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Rexroth: Screw Assemblies. Catalog (R999001185/2018-10) - page 11

151

Technical data

Size

Rigidity and dynamic drag torque of the single nuts

with preload class C1

Preload class C2

Preload class C3

R_nu

F_pr

T_p0

R_nu

F_pr

T_p0

R_nu

F_pr

T_p0

(N/µm)

(N)

(Nm)

(N/µm)

(N)

(Nm)

(N/µm)

(N)

(Nm)

d₀ x P x D_w - i

Tolerance grade 3; 5; 7

63 x 10R x 6 - 6

1,100

1,780

1.120

1,250

2,660

1.68

1,460

4,440

2.800

63 x 20R x 6.5 - 3

570

1,060

0.670

650

1,600

1.01

770

2,660

1.680

63 x 20R x 6.5 - 5

950

1,680

1.060

1,080

2,520

1.59

1,280

4,200

2.640

63 x 20R x 6.5 - 8

1,250

2,090

1.320

1,430

3,140

1.98

63 x 40R x 6.5 - 2

390

740

0.460

440

1,110

0.70

520

1,850

1.160

63 x 40R x 6.5 - 3

580

1,070

0.670

660

1,600

1.01

780

2,670

1.680

63 x 40R x 6.5 - 6

950

1,600

1.010

1,080

2,400

1.51

80 x 10R x 6.5 - 6

1,290

2,170

1.730

1,460

3,250

2.60

1,700

5,420

4.340

80 x 20R x 12.7 - 6

1,430

5,250

4.200

1,620

7,880

6.31

1,910

13,100

10.510

Size

Rigidity and dynamic drag torque of the double nuts

with preload class C5

with preload class C4

Tolerance grade 3; 5; 7

R_nu

F_pr

T_p0

R_nu

F_pr

T_p0

d₀ x P x D_w - i

(N/µm)

(N)

(Nm)

(N/µm)

(N)

(Nm)

16 x 5R x 3 - 4

320

860

0.06

360

1,230

0.08

20 x 5R x 3 - 4

400

1,000

0.08

450

1,430

0.11

25 x 5R x 3 - 4

470

1,110

0.11

330

1,590

0.16

25 x 10R x 3 - 4

480

1,100

0.11

440

1,570

0.16

32 x 5R x 3.5 - 4

570

1,510

0.19

640

2,160

0.28

32 x 10R x 3.969 - 5

770

2,220

0.28

860

3,170

0.41

40 x 5R x 3.5 - 5

850

2,040

0.33

950

2,910

0.47

40 x 10R x 6 - 4

760

3,500

0.56

850

5,000

0.80

40 x 10R x 6 - 6

1,150

5,050

0.81

1,280

7,210

1.15

40 x 20R x 6 - 3

570

2,650

0.42

640

3,790

0.61

50 x 5R x 3.5 - 5

1,000

2,240

0.45

1,110

3,200

0.64

50 x 10R x 6 - 4

900

3,880

0.78

1,010

5,540

1.11

50 x 10R x 6 - 6

1,350

5,580

1.12

1,510

7,970

1.59

50 x 20R x 6.5 - 5

1,180

5,300

1.06

1,320

7,570

1.51

63 x 10R x 6 - 4

1,080

4,330

1.09

1,200

6,180

1.56

63 x 10R x 6 - 6

1,620

6,220

1.57

1,800

8,880

2.24

63 x 20R x 6.5 - 5

1,420

5,870

1.48

1,590

8,390

2.11

80 x 10R x 6.5 - 6

1,870

7,590

2.43

2,070

10,800

3.47

80 x 20R x 12.7 - 6

2,130

18,400

5.88

2,380

26,300

8.41

152

Screw Assemblies | Ball Screw Assemblies BASA

Technical data

Frictional torques of the seals

Size

Dynamic drag torque

Seal torque for single

Standard seal

reinforced seal

Low-friction seal

and double nuts

d₀ x P x D_w

T_RDapprox.

T_RD = 0 Nm

T₀

= overall dynamic drag torque

(Nm)

T₀

= T_p0+ T_RD

6 x 1R x 0.8

T_RD = dynamic drag torque of the 2 seals

6 x 2R x 0.8

T_p0 = dynamic drag torque without seals

8 x 1R x 0.8

d₀

= nominal diameter

8 x 2R x 1.2

= lead

8 x 2.5R x 1.588

0.015

D_w = ball diameter

8 x 5R x 1.588

0.015

12 x 2R x 1.2

0.030

12 x 5R x 2

0.030

12 x 10R x 2

0.030

16 x 5R x 3

0.080

16 x 5L x 3

0.080

16 x 10R x 3

0.080

Note:

16 x 16R x 3

0.080

To measure the dynamic drag torque, see

20 x 5R x 3

0.100

the “Installation” section page 155.

20 x

5L x 3

0.100

20 x

10R x 3

0.120

20 x

20R x 3.5

0.120

20 x

40R x 3.5

0.040

25 x

5R x 3

0.120

0.34

25 x

5L x 3

0.120

25 x

10R x 3

0.150

0.29

25 x

25R x 3.5

0.200

0.25

32 x

5R x 3.5

0.250

0.51

32 x

5L x 3.5

0.250

32 x

10R x 3.969

0.250

0.46

32 x

20R x 3.969

0.250

0.49

32 x

32R x 3.969

0.250

0.45

32 x

64R x 3.969

0.250

0.45

40 x

5R x 3.5

0.400

0.85

40 x

5L x 3.5

0.400

40 x

10R x 6

0.400

0.91

40 x

10L x 6

0.400

40 x

12R x 6

0.400

40 x

16R x 6

0.400

40 x

20R x 6

0.400

0.54

40 x

25R x 6

0.400

0.54

40 x

30R x 6

0.400

0.54

40 x

40R x 6

0.400

0.54

50 x

5R x 3.5

0.500

50 x

10R x 6

0.600

0.95

50 x

12R x 6

0.600

50 x

16R x 6

0.600

50 x

20R x 6.5

0.600

0.95

50 x

25R x 6.5

0.700

50 x

30R x 6.5

0.700

0.95

50 x

40R x 6.5

0.700

63 x

10R x 6

1.200

63 x

20R x 6.5

1.200

1.40

63 x

40R x 6.5

1.200

1.40

80 x

10R x 6.5

1.400

80 x

20R x 12.7

2.200

153

Technical data

When retrofitting and changing

Standard nuts

FED nut

over the seals, please note:

All precision screws with small leads are

Fig. 1

single-start

Single-start seal

(Figure 1). There is thus no ball raceway on

the screw.

Precision screws with higher leads,

however, are 2-start or 4-start

(Figs. 2 and 3).

“Reinforced seals” for precision screws

Fig. 2

are optionally available. This version can

Seal for the 2-start precision

be identified by the opal-green coloring of

screw with medium lead

the component and the material number.

Low-friction seals for precision screws are

available on request. This version can be

identified by the red-brown coloring of the

component and the material number.

Fig. 3

Seal for the 4-start precision

screw with high lead

Installing the seal

Position the nut on the screw according to

the Figure. Lay the wiper seal with the nose

in the recess and press until it snaps into

the groove. When turning the nut on the

screw, monitor the sealing lip and align it by

pressing on the end face if need be. Please

make sure that the sealing lip does not get

damaged.

Detailed assembly instructions are included

with the delivery.

5 - 10 mm

154

Screw Assemblies | Ball Screw Assemblies BASA

Installation

Delivery condition

Nut mounting

Individual mounting steps

Normally, Rexroth ball screws are supplied

Carry out installation as follows:

initially greased with Dynalub grease. This

Preloaded single nut double nut

Remove the retaining ring (! mounting

makes possible relubrication using oil or

These versions are always supplied on the

instructions) on one side of the mounting

grease. and cartridges and cans of this

ready-mounted nut unit on the screw.

arbor.

grease are available. If another lubricant

You must not disassemble the nut unit and

is used, you will need to check that it is

the screw. If this is unavoidable, please

compatible with the initial lubrication grease.

In special cases, a Ball Screw Assembly

with only a preservative coating can be

ordered and supplied using the appropriate

ordering code.

Note: In the case of Ball Screw

Assemblies with a front lube unit, do

Note

not rotate the nut and the front lube

The selected lubricant must be in the nut

unit from the screw.

before the machine is started.

Single nut with standard backlash

Push the mounting arbor with the nut to the

Cleaning

Single nut with reduced backlash

start of the thread.

Various cleaning agents can be used to

Adjustable-preload single nut

The arbor must be in contact on an axially

degrease and wash the assembly:

backlash-free basis.

aqueous cleaning agents

You must only mount the nut unit on an

Now, carefully turn the nut unit onto the

-–

organic cleaning agents

end-machined screw using a mounting

thread with slight axial pressure.

arbor. The screw journal is then used

Note

to center the mounting arbor. In the case

Immediately after cleaning, thoroughly dry

of screw ends of Form “00”, you can use a

all parts and apply a preservative coating or

centering bore “Z” on the end face to place

anti-corrosion oil.

an auxiliary spigot in position for mounting.

In all cases, take care to observe the ap-

The external diameter of the arbor should

propriate legal regulations (environmental

be approximately 0.1 mm less than the root

protection, health and safety at work, etc.)

diameter of the screw. In most cases, you

as well as the specifications for the clean-

can use the supplied arbor with nut units. The

ing agent (e.g. handling).

start of the screw’s thread must be rounded

off carefully to avoid damage to the seal and

the individual inner parts of the nut unit.

Do not remove the mounting arbor until the

nut unit is located completely on the screw

Storage

thread.

Ball Screw Assemblies are high-quality

systems that must be treated with due care.

In order to prevent damage and contamina-

tion, the elements should not be removed

from the protective wrapping until immedi-

ately before installation. Once they have

been removed from the packaging, they

must be set down on V-shaped cradles.

The individual mounting steps are

described below.

Disassembly is carried out in the reverse

order. Be particularly careful; otherwise, the

nut or its individual internal parts could be

damaged, which would lead to premature

failure of the Ball Screw Assembly.

155

Installation

Steel/aluminum and aluminum/aluminum

Preloading of the adjustable-

Installation in the machine

material pairings

preload single nut

It is not normally necessary to remove the

Screw

Tightening torque (Nm)

Measuring of the dynamic drag torque with

preservative coating before installation.

diameter

Strength classes as per

SEM-E-S and SEM-E-C.

If the Ball Screw Assembly is

(mm)

DIN ISO 898

Use an adjusting screw to restrict the

contaminated, you must clean it first

8.8

10.9

12.9

clearance of the nut that is ready-mounted

(see “Cleaning”) and re-oil it

1.2

on the screw such that the dynamic drag

Push the nut unit into the mounting bore,

2.4

torque T_p0 achieves the value in the table

taking care to avoid any impact force or

4.8

! page 148 (with the Ball Screw Assem-

misalignment.

8.5

bly lightly oiled).

Tighten the mounting screws using a

20.0

You must carry out the inspection across

torque wrench if necessary. Maximum

M10

41.0

the entire length of the thread; if the values

tightening torque for the steel/steel mate-

M12

70.0

are different from the ones in the table,

rial pairing (R_m ≥ 370 N/mm²), see table.

M14

110.0

correct the setting.

M16

175.0

After you make the setting, the centering

Steel/steel material pairing

M18

250.0

diameter D₁ must match the values in the

Screw

Tightening torque (Nm)

M20

345.0

tables ! page 38 and 40. Cover the

diameter

Strength classes as per

head of the screw with a protective cap.

(mm)

DIN ISO 898

= F·r

Tightening torques for fastening screws

Measure value, e.g.

8.8

10.9

12.9

according to VDI 2230 where

Set screw

with spring gauge

1.3

1.8

2.1

µ_G = µ_K = 0.125

2.7

3.8

4.6

5.5

8.0

9.5

13.0

16.0

Aligning the Ball Screw Assembly

23.0

32.0

39.0

in the machine

M10

46.0

64.0

77.0

A gauge¹⁾ with a self-aligning contact pad is

M12

80.0

110.0

135.0

available from Rexroth for easy alignment of

M14

125.0

180.0

215.0

the Ball Screw Assembly.

M16

195.0

275.0

330.0

M18

280.0

400.0

470.0

T_pa

= currently measured dynamic drag

M20

390.0

560.0

650.0

torque

Two pads of different lengths are available

which can be used depending on the screw

Assembly instructions are included with

The maximum tightening torques speci-

lead:

each delivery. If you need additional copies,

fied in the table below apply to the steel/

Part number R3305 131 19

please ask us.

aluminum or aluminum/aluminum material

length 33 mm for leads < 20

pairings (R_m ≥ 280 N/mm²).

Part number R3305 131 21

When driving screws into aluminum, the

length 50 mm for leads > 20

length of thread engagement should be

at least 1.5 times the screw diameter.

Mounting screws

Always make sure the screws

are secure where there are high screw

loads!

1) The dial gauge is not supplied

156

Screw Assemblies | Ball Screw Assemblies BASA

Installation

Installation Tolerances

Note

Any alignment errors can lead to premature failure of the Ball Screw Assembly, which means that they are not allowed!

To ensure that a BASA can actually achieve the calculated service life and performance, its system-related requirements and limitations

must be taken into account at the design stage. Screw assemblies are not suitable for transferring radial forces and torques, such as may

be caused by misalignments during installation. The following sections illustrate the most important principles for achieving designs that will

be compatible with the screw drive system and its requirements.

When using BASAs, the specified installation tolerances must be observed when designing and building the adjoining structures. The first

basic principle is: The higher the BASA’s precision and preload, the more accurate the adjoining structures must be.

This applies in particular to applications in which the nut travels close up to the end bearings since, in this area, the risk of distortive

stresses and therefore of additional loads is very high.

2 · d₀

2 · d

Parallelism offset and details of the rectangularity between the screw shaft axis and the location face of the nut housing.

= distance between end bearings

(mm)

d₀

= nominal diameter of screw

(mm)

= permissible deviation from rectangularity:

The tolerance applies to a surface that must lie

between two planes spaced at a distance X from

each other which are perpendicular to the reference axis A.

(mm)

= Permissible parallelism offset between the guide

and the Ball Screw Assembly

(mm)

Preload option

The adjacent table shows the most important recommended tolerances for Ball Screw Assemblies as a

(mm)

function of the preload.

Backlash

0.04

These tolerances include the rectangularity of the nut housing (or adjoining structure) relative to the

Preloaded

0.02

screw axis. The tolerances for parallelism between the guide and the Ball Screw Assembly must also

be complied with.

Minimum distance of the nut from the end bearings > 2 • d₀

Any alignment errors can lead to premature breakdown of the Ball Screw Assembly!

157

Installation

Lubrication

Do not use greases containing solid particles (e.g. graphite or MoS₂)!

If other lubricants are used, this may lead to a reduction in the relubrication intervals, the achievable travel in short-stroke

applications, and the load capacities. Possible chemical interactions between the plastic materials, lubricants and preservative

oils must also be taken into account.

If your application makes greater environmental demands (i.e. cleanroom, vacuum, foodstuff application, strong or aggres-

sive metalworking fluids, or extreme temperatures) please contact us, since a special test, and possibly a special lubricant, will be

required. Please have all information about your application to hand.

When using in other sectors, e.g.: food industry, clean room, vacuum etc. or at extreme temperatures, or if the lubrication is

exposed to process media, the standard initial lubrication and anti-corrosion agents used prior to shipment may not be suitable,

or they may be incompatible with the relubrication lubricant. In this case, please consult us in advance!

Even under normal operating conditions, the system must be relubricated at the latest after 2 years due to aging of the

grease. Please note the reduced load ratings according to the technical notes.

Recommendation:

In general, you should not apply the lubricant all in one go; rather, apply several smaller amounts.

In the case of a short stroke, (stroke ≤ nut length, L), it is advisable to carry out a lubricating stroke more often. In this case, there

is a risk, amongst other things, that low-viscosity lubricants drop out.

Please note the information about reducing the load rating in “"Technical notes"” on page 141.

Please consult our regional centers regarding short stroke applications.

You can find your local contact person at: www.boschrexroth.com/contact

158

Screw Assemblies | Ball Screw Assemblies BASA

Lubrication

Grease lubrication With a grease gun or a progressive lubrication system in the case of Ball Screw Assemblies > Ø 12 mm

Lubricating grease

We recommend using Dynalub 510 with

Under conventional environmental conditions,

You can download product and safety

the following properties:

this ground-fiber, homogeneous grease is ideally

data sheets from our website at:

NLGI grade 2 lithium-based high-

suited for the lubrication of linear elements:

www.boschrexroth.de.

performance grease as per DIN 51818

For loads of up to 50% C

Please also observe the information on

(KP2K-20 according to DIN 51825)

-–

For short-stroke applications ≥ 1 mm

page 170.

Good water resistance

-–

For the permissible speed range of Ball Screw

Material numbers for Dynalub 510:

-–

Corrosion protection

Assemblies

R3416 037 00 (cartridge 400 g)

-–

Temperature range: -20 to +80 °C

-–

R3416 035 0 0 (hobbock 25 kg)

Initial lubrication of the Ball Screw

Assemblies (basic lubrication)

Fully assembled BASAs with a diameter

When individual parts are supplied (nut on

The positioning and traversing instruc-

greater than 12 mm are prelubricated at

mounting arbor) or with versions without basic

tions (see figure below) must be

the factory with Dynalub 510.

lubrication at the factory, you must apply double

complied with.

the quantity of lubricant stated in the “Lubricant

When using progressive lubrication

quantities - Relubrication” table via the nut’s lube

systems, ensure that all the lines and

hole before commissioning.

distributors (including the connection

to the BASA nut unit) are filled before

carrying out basic lubrication or

relubrication.

Positioning and traversing instructions

Horizontal mounting position

Vertical mounting position

Position of the nut during lubrication

Flange with lube port (if installed horizontally, the port should be at the top if possible)

Direction of travel after lubrication. Traversing path should be at least 3x the nut length.

Relubricating the Ball Screw Assemblies

If the relubrication interval according to the diagram on page 159 has been reached, relubricate the amount stated in Table “Amount of

lubricant for relubrication” on page 160.

In this connection, you must comply with the nut position and traversing path shown in the “Positioning and traversing instructions” illustration.

159

Lubrication

Load-dependent re-greasing intervals

in the case of grease lubrication with a

(M revolutions)

grease gun or a progressive lubrication

100

system in the case of Ball Screw Assem-

d₀ ≤ Ø 40 mm

blies > Ø 12 mm (“dry axes”)

This applies to the following conditions:

Dynalub 510 grease or, alternatively,

Castrol Longtime PD 2,

Elkalub GLS 135/N2 grease

d₀ > Ø 40 mm

No exposure to media

-–

Standard seals

-–

Driven screws

-–

Not mission critical operation

-–

Ambient temperature: T = 20 to 30 °C

= relubrication interval

m/C

in millions of revolutions (10⁶ revolutions)

C = dynamic load rating

(N)

0,1

0,2

0,3

0,4

F_m = average load

(N)

d₀ = nominal diameter

(mm)

Conversion of the relubrication interval s

s in millions (of revs) · lead P (mm)

from millions of revolutions to kilometers:

s in kilometers =

10⁶

Example:

50 · 10⁶ (revs) · 16 (mm)

s in kilometers =

= 8,00 km

10⁶

Notes

The load ratio F_m/C is the quotient of the average load F_m and the dynamic load rating C (see “Calculation”).

If you are using a progressive lubrication system, please take into account the minimum metering quantity of 0.03 cm³.

In this connection, please note the general lubrication information on page 157.

160

Screw Assemblies | Ball Screw Assemblies BASA

Lubrication

Grease lubrication With a grease gun or a progressive lubrication system in the case of Ball Screw Assemblies > Ø 12 mm

Amount of lubricant for relubrication

Size

Amount of lubricant for relubrication (cm³)

FED-E-B / FEM-E-B / FEM-E-C / FEM-E-S / FEP-E-S

FAR-B-S¹⁾

ZEV-E-S

FDM-E-C / FDM-E-S

d₀ x P x D_w - i

SEM-E-C / SEM-E-S / ZEM-E-S / ZEM-E-K / ZEM-E-A

16x5Rx3 - 3

0.9

16x5R/Lx3 - 4

0.70

1.75

16x10Rx3 - 3

0.85

1.10

16x16Rx3 - 2

0.95

16x16Rx3 - 3

1.20

16x16Rx3 - 6

1.35

20x5R/Lx3 - 4

1.00

1.30

2.95

20x5Rx3 - 5

1.15

20x10Rx3 - 4

1.50

20x20Rx3.5 - 2

1.85

20x20Rx3.5 - 3

2.40

20x20Rx3.5 - 6

2.50

20x40Rx3.5 - 4

1.75

25x5R/Lx3 - 4

1.50

3.50

25x5Rx3 - 7

1.95

25x10Rx3 - 4

1.85

4.15

25x10Rx3 - 5

2.05

25x25Rx3.5 - 2

2.65

25x25Rx3.5 - 3

3.45

25x25Rx3.5 - 4.8

1.65

25x25Rx3.5 - 6

3.90

32x5Lx3.5 - 4

2.50

32x5Rx3.5 - 4

2.15

4.90

32x5Rx3.5 - 5

2.40

32x10Rx3.969 - 5

3.05

3.5

3.25

6.65

32x20Rx3.969 - 2

2.80

32x20Rx3.969 - 3

3.55

4.0

32x20Rx3.969 - 6

3.70

32x32Rx3.969 - 2

4.05

32x32Rx3.969 - 3

5.45

6.0

32x32Rx3.969 - 4.8

2.85

32x32Rx3.969 - 6

6.20

32x64Rx3.969 - 4

3.35

40x5Lx3.5 - 5

3.35

40x5Rx3.5 - 5

2.95

7.60

40x10Lx6 - 4

6.50

40x10Rx6 - 4

6.65

16.75

40x10Rx6 - 5

7.70

8.4

40x10Rx6 - 6

8.15

19.70

40x12Rx6 - 4

6.75

40x16Rx6 - 4

9.15

21.35

40x20Rx6 - 3

8.70

9.8

20.55

40x20Rx6 - 8

9.35

40x25Rx6 - 4

10.84

40x25Rx6 - 8

10.99

40x30Rx6 - 4

11.95

40x30Rx6 - 8

12.29

40x40Rx6 - 2

10.40

40x40Rx6 - 3

14.30

16.1

40x40Rx6 - 6

15.00

161

Lubrication

Size

Amount of lubricant for relubrication (cm³)

FED-E-B / FEM-E-B / FEM-E-C / FEM-E-S / FEP-E-S

FAR-B-S¹⁾

ZEV-E-S

FDM-E-C / FDM-E-S

d₀ x P x D_w - i

SEM-E-C / SEM-E-S / ZEM-E-S / ZEM-E-K / ZEM-E-A

50x5Rx3.5 - 5

4.65

11.70

50x10Rx6 - 4

21.90

50x10Rx6 - 6

10.75

12.2

25.55

50x12Rx6 - 6

11.60

50x16Rx6 - 6

16.15

50x20Rx6.5 - 3

12.65

50x20Rx6.5 - 5

17.35

19.5

34.75

50x20Rx6.5 - 8

9.90

50x25Rx6.5 - 4

14.20

50x25Rx6.5 - 6

10.45

50x30Rx6.5 - 4

14.73

50x30Rx6.5 - 8

14.81

50x40Rx6.5 - 2

15.45

50x40Rx6.5 - 3

20.65

23.3

50x40Rx6.5 - 6

19.15

63x10Rx6 - 4

25.55

63x10Rx6 - 6

12.15

13.8

30.00

63x20Rx6.5 - 3

15.45

63x20Rx6.5 - 5

21.35

24.0

43.75

63x20Rx6.5 - 8

14.35

63x40Rx6.5 - 2

18.90

63x40Rx6.5 - 3

25.40

28.7

63x40Rx6.5 - 6

26.95

80x10Rx6.5 - 6

19.10

66.00

80x20Rx12.7 - 6

65.50

132.75

1) Grease can be applied to the driven nut via the outer ring of the angular-contact thrust ball bearing. The only thing to observe is that the nut must stand still during the lubrica-

tion process. The nut may be positioned anywhere on the screw during this process. This easily solves the problem of a rotating lube fitting on the nut. Two lube fittings (M6)

with radial or axial access are provided. Condition on delivery: both sealed by setscrews. The desired lube port can be opened by removing the set screw.

Note: The sizes that are listed in the table are not available for all nut types.

You can find the respective size range in the chapter entitled “Nuns” from page 24 onward.

162

Screw Assemblies | Ball Screw Assemblies BASA

Lubrication

Liquid grease lubricationwith a single-line piston distributor system and

Liquid grease lubrication with Ball Screw Assemblies ≤ Ø 12 mm

Lubricating grease

We recommend using Dynalub 520 with

With miniature versions

the following properties:

Under conventional environmental condi-

Lithium-based, high-performance grease

tions, this ground-fiber, homogeneous

You can download product and safety

of NLGI grade 00 according to

grease is ideally suited for the lubrication of

data sheets from our website at:

DIN 51818 (GP00K-20 according

linear elements:

www.boschrexroth.de.

to DIN 51826)

In single-line one-point lubrication

Please also observe the information on

Good water resistance

systems

page 170.

-–

Corrosion protection

For loads of up to 50% C

-–

Temperature range: -20 to +80 °C

For short-stroke applications ≥ 1 mm

Material numbers for Dynalub 520:

-–

For the permissible speed range of

R3416 043 00 (cartridge 400 g)

Ball Screw Assemblies

R3416 042 00 (bucket 5 kg)

-–

R0419 090 01 (5 ml maintenance kit)

Initial lubrication of the Ball Screw

The positioning and traversing instructions in

Assemblies (basic lubrication)

the illustration below must be complied with.

Fully assembled BASAs with a diameter less

When individual parts are supplied (nut on

When using single-line distributor systems,

than or equal to 12 mm are prelubricated at

mounting arbor) or with versions without

care should be taken that all lines and the

the factory with Dynalub 520.

basic lubrication at the factory, you must

piston distributors (including the connection

apply double the quantity of lubricant stated

to the BASA nut) are filled before performing

in table “Amount of lubricant for relubrication”

basic lubrication or relubrication. In the case

on page 164 via the nut’s lube hole before

of Ball Screw Assemblies ≤ Ø 12 mm, it is

commissioning.

advisable to use the maintenance set.

Positioning and traversing instructions

Horizontal mounting position

Vertical mounting position

Position of the nut during lubrication

Flange with lube port (if installed horizontally, the port should be at the top if possible)

Direction of travel after lubrication. Traversing path should be at least 3x the nut length.

Relubricating the Ball Screw Assemblies

Apply the relubrication quantity according

The pulse count that is needed for this is

to Table “Amount of lubricant for relubrica-

the integer quotient of the relubrication

The lubricant cycle time can then be

tion” on page 164 to the lube port until

amount according to table “Amount of lubri-

obtained by dividing the relubrication inter-

the specified relubrication interval shown

cant for relubrication” on page 164 and

val by the calculated pulse count.

in the diagram on page 163 has been

the piston distributor size.

In this connection, you must comply with

reached.

In this connection, you must ensure that the

the nut position and traversing path shown

smallest piston distributor size of 0.03 cm³

in the “Positioning and traversing instruc-

is not fallen short of.

tions” illustration.

163

Lubrication

load-dependent re-greasing intervals in

the case of a single-line piston distribu-

(M revolutions)

tor system and liquid grease lubrication

100.0

with Ball Screw Assemblies ≤ Ø 12 mm

(“dry axes”)

d₀ ≤ Ø 40 mm

This applies to the following conditions:

37.5

Dynalub 520 grease or, alternatively,

Castrol Longtime PD 00, Elkalub GLS

135/N00 grease

No exposure to media

d₀ > Ø 40 mm

-–

Standard seals

7.5

Driven screws

-–

Not mission critical operation

-–

Ambient temperature: T = 20 to 30 °C

m/C

1.0

= relubrication interval

0.1

0.2

0.3

0.4

in millions of revolutions

(10⁶ revolutions)

= dynamic load rating

(N)

F_m

= average load

(N)

d₀

= nominal diameter

(mm)

s in millions (of revs) · lead P (mm)

Conversion of the relubrication interval s

s in kilometers =

10⁶

from millions of revolutions to kilometers:

Example:

37,5 · 10⁶ (revs) · 16 (mm)

s in kilometers =

= 600 km

10⁶

Notes

The load ratio F_m/C is the quotient of the average load F_m and the dynamic load rating C (see “Calculation”).

When using a single-line distributor system, you must ensure that the smallest piston distributor size of 0.03 cm3 is not fallen

short of.

We recommend using piston distributors from SKF. They should be installed as close as possible to the lube ports of the Ball Screw

Assembly nut.

Long lines and small line diameters should be avoided, and the lines should be laid on an upward slant.

If other consumers are connected to the single-line centralized lubrication system, the weakest link in the chain determines the lubrication

cycle time.

Pumping or storage tanks for the lubricant should be fitted either with a stirrer or a follower piston to guarantee the flow of lubricant

(to avoid funneling in the tank).

In this connection, please note the general lubrication information on page 157.

164

Screw Assemblies | Ball Screw Assemblies BASA

Lubrication

Amount of lubricant for relubrication

Size

Amount of lubricant for relubrication (cm³)

FED-E-B / FEM-E-B / FEM-E-C / FEM-E-S / FEP-E-S

ZEV-E-S

FDM-E-C / FDM-E-S

d₀ x P x D_w - i

SEM-E-C / SEM-E-S / ZEM-E-S / ZEM-E-K / ZEM-E-A

6x1Rx0.8-3

0.05

6x2Rx0.8-3

0.05

8x1Rx0.8-4

0.06

8x2Rx1.2-4

0.07

8x2.5Rx1.588-3

0.11

8x5Rx1.588-3

0.12

12x2Rx1.2-4

0.17

12x5Rx2-3

0.33

12x10Rx2-2

0.33

16x5Rx3-3

0.90

16x5R/Lx3-4

0.70

1.75

16x10Rx3-3

0.85

1.10

16x16Rx3-2

0.95

16x16Rx3-3

1.20

16x16Rx3-6

1.35

20x5R/Lx3-4

1.00

1.30

2.95

20x5Rx3-5

1.15

20x10Rx3-4

1.50

20x20Rx3.5-2

1.85

20x20Rx3.5-3

2.40

20x20Rx3.5-6

2.50

20x40Rx3.5-4

1.75

25x5R/Lx3-4

1.50

3.50

25x5Rx3-7

1.95

25x10Rx3-4

1.85

4.15

25x10Rx3-5

2.05

25x25Rx3.5-2

2.65

25x25Rx3.5-3

3.45

25x25Rx3.5-4.8

1.65

25x25Rx3.5-6

3.90

32x5Lx3.5-4

2.50

32x5Rx3.5-4

2.15

4.90

32x5Rx3.5-5

2.40

32x10Rx3.969-5

3.05

3.25

6.65

32x20Rx3.969-2

2.80

32x20Rx3.969-3

3.55

32x20Rx3.969-6

3.70

32x32Rx3.969-2

4.05

32x32Rx3.969-3

5.45

32x32Rx3.969-4.8

2.85

32x32Rx3.969-6

6.20

32x64Rx3.969-4

3.35

40x5Lx3.5-5

3.35

40x5Rx3.5-5

2.95

7.60

40x10Lx6-4

6.50

40x10Rx6-4

6.65

16.75

40x10Rx6-5

7.70

40x10Rx6-6

8.15

19.70

40x12Rx6-4

6.75

40x16Rx6-4

9.15

21.35

40x20Rx6-3

8.70

20.55

40x20Rx6-8

9.35

40x25Rx6-8

11.00

40x30Rx6-8

12.20

165

Lubrication

Size

Amount of lubricant for relubrication (cm³)

FED-E-B / FEM-E-B / FEM-E-C / FEM-E-S / FEP-E-S

ZEV-E-S

FDM-E-C / FDM-E-S

d₀ x P x D_w - i

SEM-E-C / SEM-E-S / ZEM-E-S / ZEM-E-K / ZEM-E-A

40x40Rx6-2

10.40

40x40Rx6-3

14.30

40x40Rx6-6

15.00

50x5Rx3.5-5

4.65

11.70

50x10Rx6-4

21.90

50x10Rx6-6

10.75

25.55

50x12Rx6-6

11.60

50x16Rx6-6

16.15

50x20Rx6.5-3

12.65

50x20Rx6.5-5

17.35

34.75

50x20Rx6.5-8

9.90

50x25Rx6.5-6

10.45

50x30Rx6.5-6

14.80

50x40Rx6.5-2

15.45

50x40Rx6.5-3

20.65

50x40Rx6.5-6

19.15

63x10Rx6-4

25.55

63x10Rx6-6

12.15

30.00

63x20Rx6.5-3

15.45

63x20Rx6.5-5

21.35

43.75

63x20Rx6.5-8

14.35

63x40Rx6.5-2

18.90

63x40Rx6.5-3

25.40

63x40Rx6.5-6

26.95

80x10Rx6.5-6

19.10

66.00

80x20Rx12.7-6

65.50

132.75

Note: The sizes that are listed in the table are not available for all nut types.

You can find the respective size range in the chapter entitled “Nuns” from page 24 onward.

Content .. 9 10 11 12 ..