Rexroth: Screw Assemblies. Catalog (R999001185/2018-10) - page 1
Screw Assemblies
Ball Screw Assemblies BASA/Planetary Screw Assemblies PLSA
Ball Screw Assemblies BASA
Ball Screw Assemblies are the efficient solution for the precise conversion of rotary to linear
motion. Building on our many years of experience and extensive engineering expertise, we
have developed a product range that fulfills the most diverse requirements. No matter
whether you need very high linear speeds, maximum load ratings, or minimum installed
length, you will always find the right solution in Rexroth’s broad manufacturing spectrum.
To make sure your application runs with the utmost accuracy and operational reliability, the
individual components in our range have been precisely matched to one another,
so complete assemblies can be put together efficiently.
More detailed information from page 7 onwards
Characteristic features
▶▶
A really varied range, suitable for virtually any
▶▶
Easy installation of the nuts, mounting orientation
requirements
individually specified
▶▶
Absolutely uniform and stable functioning
▶▶
Adjustable preloaded single nuts
▶▶
Especially smooth operation due to optimal ball
▶▶
Extensive range comprising various series
pick-up and recirculation
▶▶
Matching supplementary individual components such as
▶▶
High load rating due to large number of balls
nut housings and end bearings, also as pillow block
▶▶
Short nut length
units, partly prepared for the installation of suitable
motor flanges
Planetary Screw Assemblies PLSA
The Planetary Screw Assembly PLSA is a complete cylindrical screw assembly with planets
as the rolling elements. It serves to convert rotary motion into linear motion and vice versa.
The basic functioning of a Planetary Screw Assembly is easy to describe, but the range of
designs and the requirements for practical applications are many and varied.
Planetary Screw Assemblies are designed to transmit high forces and thus round off the
upper end of the screw assembly product portfolio.
Planetary Screw Assemblies are screw assemblies in which threaded rollers (the planets)
are housed in a threaded nut, their ends being lodged in discs with holes arranged around a
pitch circle so that they rotate axially parallel to the special threaded screw, causing the nut
to move linearly along the screw.
More detailed information from page 193 onwards
Characteristic features
▶▶
Smooth functioning due to the principle of synchro-
▶▶
High power density
nized planets
▶▶
Pre-tensioned units available
▶▶
Very quiet operation
▶▶
High positioning accuracy and repeatability
▶▶
Long service life
▶▶
Low lubricant consumption
▶▶
Compact design
Screw Assemblies
3
4
Screw Assemblies |
Notes
General Notes
▶▶
Non-horizontal installation
There is no self-locking effect due to the low level of friction between the screw and the nut.
The components of the product are designed to last for the product's service life; a major defect may nonetheless arise
in exceptional cases, and if the moving part (i.e. the screw assembly nut) is not installed horizontally it may fall off. An
additional protection against falling loads is therefore required for non-horizontal installation.
Intended use
▶▶
Rexroth Screw Assemblies are components that are used to convert a rotary motion into a linear motion, and vice
versa. Rexroth Screw Assemblies are intended exclusively for use in machines for moving and positioning.
▶▶
The product is intended exclusively for professional use and not for private use.
▶▶
Use for the intended purpose also includes the requirement that users must have read and understood the related
documentation completely, in particular the “Safety Instructions.”
Misuse
Use of the product in any other way than as described under “Intended Use” is considered to be misuse and is therefore
not permitted. If unsuitable products are installed or used in safety-relevant applications, this may lead to uncontrolled
operating statuses in the application which can cause personal injury and/or damage to property.
The product may only be used in safety-relevant applications if this use has been expressly specified and permitted in the
product documentation.
Bosch Rexroth AG will not accept any liability for injury or damage caused by misuse of the product. The risks associated
with any misuse of the product shall be borne by the user alone.
Misuse of the product includes:
▶▶
transporting people
General safety instructions
▶▶
The safety rules and regulations of the country in which the product is used must be complied with.
▶▶
All current and applicable accident prevention and environmental regulations must be adhered to.
▶▶
The product may only be used when it is in technically perfect condition.
▶▶
The technical data and environmental conditions stated in the product documentation must be complied with.
▶▶
The product must not be put into service until it has been verified that the final product (for example a machine or
system) into which the product has been installed complies with the country-specific requirements, safety regulations
and standards for the application.
▶▶
Rexroth Screw Assemblies may not be used in zones with potentially explosive atmospheres as defined in the
ATEX directive 94/9/EC.
▶▶
Rexroth Screw Assemblies must never be altered or modified. The user may only perform the work described in the
"Quick User Guide" or the "Mounting Instructions for Screw Assemblies."
▶▶
The product must never be disassembled.
▶▶
At high travel speeds a certain amount of noise is caused by the product. If necessary, appropriate measures should be
taken to protect hearing.
▶▶
Special safety requirements for specific sectors (e.g. cranes, theaters, foodstuffs) as provided for in laws, directives
and standards must be complied with.
▶▶
The following standards must be complied with: ISO 3408 and DIN 69051.
| Screw Assemblies
5
Directives and standards
Rexroth Screw Assemblies are suitable for dynamic linear applications that are moved and positioned reliably and pre-
cisely. The machine tool industry and other sectors must observe a series of standards and directives. These requirements
can vary significantly worldwide. It is therefore essential to understand the legislation and standards that apply in each
particular region.
DIN EN ISO 12100
This standard is entitled Safety of machinery - General principles for design - Risk assessment and risk reduction. It gives
a general overview and contains a guide to the major developments governing machines and their intended use.
Directive 2006/42/EC
This European Machinery Directive describes the basic health and safety requirements
for the design and manufacture of machinery. The manufacturer of a machine or his authorized representative has a duty
to ensure that a risk assessment has been performed in order to determine the health and safety requirements which have
to be fulfilled for that machine. The machine must be designed and built with the results of the risk assessment in mind.
Directive 2001/95/EC
This directive covers general safety requirements for any product placed on the market and intended for consumers, or
likely to be used by consumers under reasonably foreseeable conditions, including products that are made available to
consumers in the context of service provision for use by them.
Directive 1999/34/EC
This directive concerns liability for defective products and applies to industrially manufactured movables, irrespective of
whether they have been incorporated into another movable or into an immovable or not.
REGULATION (EC) No. 1907/2006 (REACH)
This regulation relates to restrictions on the marketing and use of certain dangerous substances and preparations.
“Substances” means chemical elements and their compounds as they occur in the natural state or as produced by
industry. “Preparations” are mixtures, compounds or solutions consisting of two or more substances.
Ball Screw Assemblies BASA
8
Screw Assemblies | Ball Screw Assemblies BASA
New features at a glance
New features at a glance
Discontinuation of 4 nut types
In the standard series,
Single Nuts with flange with recirculation cap FSZ-E-S
and FSZ-E-B have been discontinued,
cc
FSZ-E-S
cc FSZ-E-B
and in the Asian series,
Single Nut with flange JIS B 1192 FEM-E-D
and Double Nut with flange D JIS B 1192 FDM-E-D
have also been discontinued.
cc
FEM-E-D
cc FDM-E-D
Series expansion
To complete our product portfolio, for size 8, lead 5 has been reissued. For this new lead, Single Nuts with flange FEM-E-B
and Cylindrical Single Nuts ZEM-E-S are available. Size 40 has also been expanded with lead 25 and 30 as well as size 50
with lead 30. These leads have been brought out especially for the machine tool. These are available for the nut types
Single Nut FEM-E-C and Single Nut with flange FED-E-B.
Nut rework
Options 02 (axial lube port) und 03 (axial lube port and additional surface) have been supplemented.
Expansion of the documentation
Option 5 = Two-point compensation
This kind of documentation is intended to compensate for the lead error of a screw.
New end forms
L1 (replacement for form 01)
K1/K1A (replacement for form 11/11A)
N1/N1A (replacement for form A1/A1A)
N2/N2A (replacement for form A2/A2A)
Introduction of a new bearing type LAS for the Ball Screw
Drive
The bearing portfolio for the Ball Screw Drive has been
expanded with the LAS series.
This bearing type is suitable for nuts with higher load
capacities.
The screw ends 81/81A and 82/82A have also been added
accordingly.
cc
LAS
9
Table of contents
Table of contents: Ball screw assemblies
New features at a glance
8
Accessories
96
Overview
96
Table of contents
9
Nut housing MGS
98
Nut housing MGD
100
Product overview
10
Nut housing MGA
102
Nuts and Nut Housings
10
Pillow Block Unit SEC-F assembly, aluminum
104
Screws
12
Pillow Block Unit SEC-L assembly, aluminum
106
Bearing
14
Pillow Block Unit SES-F assembly, steel
108
Accessories
15
Pillow Block Unit SES-L assembly, steel
110
Definition of Ball Screw Assembly
16
Pillow Block Unit SEB-F assembly
112
Ball Screw Assemblies for all applications
18
Pillow Block Unit SEB-L assembly
114
Pillow Block Unit SED-F-Z assembly
116
Sample applications
19
Pillow Block Unit SED-L-S assembly
118
Flange bearing assembly SEE-F-Z
120
Inquiries and orders
20
Bearing assembly LAF
122
Bearing assembly LAN
124
Nuts, miniature series
24
Bearing assembly LAD
126
Overview of formats
24
Bearing assembly LAL
128
Single nut with flange FEM-E-B
25
Bearing assembly LAS
130
Single nut with flange FEM-E-S
26
Slotted Nuts NMA, NMZ and NMG for fixed bearings
132
Adjustable-preload single nut SEM-E-S
27
Assembly tool for slotted nut
133
Cylindrical Single Nut ZEM-E-S/ZEM-E-K
28
Ring nut GWR
133
Screw-in nut ZEV-E-S
29
Ball Screw Assembly with front lube unit
134
Measuring pads
139
Nuts, Speed Series
30
Arrestor nut
139
Single nut with flange with recirculation caps FEP-E-S
31
Technical data
140
Nuts, standard series
32
Technical notes
140
Overview of formats
33
Acceptance Conditions and Tolerance Grades
142
Single nut with flange FEM-E-S
34
Preload and rigidity
146
Single nut with flange FEM-E-C
36
Frictional torques of the seals
152
Adjustable-preload single nut SEM-E-S
38
Adjustable-preload single nut SEM-E-C
40
Installation
154
Cylindrical Single Nut ZEM-E-S / ZEM-E-K / ZEM-E-A
42
Screw-in nut ZEV-E-S
44
Lubrication
158
Double nut with flange FDM-E-S
46
Grease lubrication
158
Double nut with flange FDM-E-C
48
Grease lubrication
160
Oil lubrication
166
Nuts, high-performance series
50
Lubricants
170
Nuts, high-performance series
50
Single nut with flange FED-E-B
52
Calculation and examples
172
Driven single nut with flange FAR-B-S
54
Calculation
172
Critical speed ncr
176
Screws
56
Permissible axial load on screw Fc (buckling load)
177
Design of drive unit FAR-B-S
178
Screw ends
58
Abbreviations
59
End Bearings
186
Design notes, installation
186
Mounting the housing
187
Lubrication of the end bearings
188
Calculation
189
Design Calculation Service Form
191
10
Screw Assemblies | Ball Screw Assemblies BASA
Product overview
Nuts and Nut Housings
Nuts
Series
Miniature
Page
Miniature series
Size
FEM-E-B
FEM-E-S
SEM-E-S
ZEM-E-S
ZEV-E-S
FEM-E-B / FEM-E-S /
d0 x P x Dw
ZEM-E-K
from
SEM-E-S / ZEM-E-S /
6 x 1 x 0.8
25
ZEM-E-K / ZEV-E-S
6 x 2 x 0.8
8 x 1 x 0.8
Speed series
8 x 2 x 1.2
8 x 2.5 x 1.588
8 x 5 x 1.588
Single nut with flange
31
with recirculation caps
12 x 2 x 1.2
FEP-E-S
12 x 5 x 2
12 x 10 x 2
Standard series
Series
Single nut with flange
34
FEM-E-S
Size
d0 x P x Dw
Single nut with flange
16 x 5 x 3
L
L
L
L
36
DIN 69 051, Part 5
16 x 10 x 3
FEM-E-C
16 x 16 x 3
20 x 5 x 3
L
L
L
L
L
20 x 10 x 3
20 x 20 x 3,5
Adjustable-preload
20 x 40 x 3,5
38
single nut
25 x 5 x 3
L
L
L
L
SEM-E-S
25 x 10 x 3
25 x 25 x 3,5
32 x 5 x 3,5
L
L
L
L
32 x 10 x 3,969
Adjustable-preload single nut
32 x 20 x 3,969
40
DIN 69051, Part 5
SEM-E-C
32 x 32 x 3,969
32 x 64 x 3,969
40 x 5 x 3,5
L
L
L
L
40 x 10 x 6
L
L
L
L
Cylindrical single nut
40 x 12 x 6
42
ZEM-E-S/ZEM-E-K/
40 x 16 x 6
ZEM-E-A
40 x 20 x 6
40 x 25 x 6
40 x 30 x 6
40 x 40 x 6
Screw-in nut
50 x 5 x 3,5
44
ZEV-E-S
50 x 10 x 6
50 x 12 x 6
50 x 16 x 6
50 x 20 x 6,5
50 x 25 x 6,5
Double nut with flange
50 x 30 x 6,5
46
FDM-E-S
50 x 40 x 6,5
63 x 10 x 6
63 x 20 x 6,5
63 x 40 x 6,5
Double nut with flange
80 x 10 x 6,5
48
DIN 69 051, Part 5
80 x 20 x 12,7
FDM-E-C
Standard range, right-hand lead
L
Left-hand lead readily available
11
Product overview
High-performance series
Page
Single nut with flange
52
DIN 69051, Part 5
FED-E-B
Driven single nut with
54
flange
FAR-B-S
Nut housing
Page
MGS
98
for standard series
Lead P
FEP-E-S
5
10
12
16
20
25
30
32
40
64
FEM-E-S
16
A
B
A
B
A
B
SEM-E-S
FDM-E-S
20
A
B
C
A
B
C
A
B
C
A
MGD
25
A
B
A
B
A
B
100
for standard series
32
A
B
C
A
B
C
A
B
C
A
B
C
A
FEM-E-C
40
A
B
C
A
B
C
B
B
A
B
C
B
B
A
B
C
SEM-E-C
50
A
B
A
B
B
A
B
A
B
B
A
B
FDM-E-C
FED-E-B
63
A
B
B
B
MGA
80
A
B
B
102
for cylindrical single nut
A = MGS
ZEM-E-S
B = MGD
ZEM-E-K
C = MGA
ZEM-E-A
12
Screw Assemblies | Ball Screw Assemblies BASA
Product overview
Screws
Precision screw BAS
Page
Tolerance grades:
57
T5, T7, T9
Sizes 6 to 12
6x1Rx0.8
6x2Rx0.8
8x1Rx0.8
8x2Rx1.2
8x2.5Rx1.588
8x5x1.588
12x2Rx1.2
12x5Rx2
12x10Rx2
Screw
300
400
500
800
1 500
2 500
length
Tolerance grades:
T5, T7, T9
Left-hand lead
Size
16x5Lx3
20x5Lx3
25x5Lx3
32x5Lx3.5
40x5Lx3.5
40x10Lx6
Screw
1 500
2 500
4 500
5 000
length
Screws in tolerance
grade T3 (longer versions
and larger sizes available
16x5Rx3
on request)
16x10Rx3
20x5Rx3
25x5Rx3
25x10Rx3
32x5Rx3.5
32x10Rx3.969
32x20Rx3.969
40x5Rx3.5
40x10Rx6
40x20Rx6
40x25Rx6
40x30Rx6
50x30Rx6.5
Screw
500
1 000
1 500
2 000
length
Standard, available at short notice
on request
13
Product overview
Precision screw BAS
Page
Tolerance grades:
57
T5, T7, T9
Größen 16 bis 80
16x5Rx3
16x10Rx3
16x16Rx3
20x5Rx3
20x10Rx3
20x20Rx3.5
20x40Rx3.5
25x5Rx3
25x10Rx3
25x25Rx3.5
32x5Rx3.5
32x10Rx3.969
32x20Rx3.969
32x32Rx3.969
32x64Rx3.969
40x5Rx3.5
40x10Rx6
40x12Rx6
40x16Rx6
40x20Rx6
40x25Rx6
40x30Rx6
40x40Rx6
50x5Rx3.5
50x10Rx6
50x12Rx6
50x16Rx6
50x20Rx6.5
50x25Rx6.5
50x30Rx6.5
50x40Rx6.5
63x10Rx6
63x20Rx6.5
63x40Rx6.5
Screw
80x10Rx6.5
length
80x20Rx12.7
1 500
2 500
3 500
4 500
7 500
10 000
13 000
5 000
5 500
6 000
Standard, available at short notice
On request
Maximum length (assembled) on request
Screw ends
Page
58
14
Screw Assemblies | Ball Screw Assemblies BASA
Product overview
Bearing
Pillow block unit
Page
SEC-F
104
SEC-L
106
SES-F
108
Lead P
1
2
2.5
5
10
12
16
20
25
30
32
40
64
6
A
A
SES-L
110
8
A
A
A
A
12
A
A
A
16
A
A
A
20
A
B
C
D
E
A
B
C
D
E
A
B
C
D
E
A
B
C
SEB-F
112
25
A
C
D
E
A
C
D
E
A
C
32
A
B
C
D
E
A
B
C
D
E
A
B
C
D
E
A
B
C
A
B
C
40
A
B
C
E
A
B
C
E
A
B
C
A
B
C
A
B
C
E
A
B
C
A
B
C
A
B
C
E
50
A
E
A
E
A
A
A
E
A
A
A
E
SEB-L
114
63
A
A
A
80
A
A
A = SEB-F and SEB-L
SED-F-Z
116
B = SEC-F and SEC-L
C = SES-F and SES-L
D = SED-F and SED-L
E = SEE-F
SED-L-S
118
SEE-F-Z
120
15
Product overview
Bearing
Bearing
Page
LAF
Lead
122
P
1
2
2.5
5
10
12
16
20
25
30
32
40
64
6
8
12
LAN
124
16
20
25
32
40
LAD
50
126
63
80
LAF
LAN / LAD
LAL
128
Lead
P
1
2
2.5
5
10
6
8
12
16
20
25
32
LAL
LAS
Lead
130
P
5
10
12
16
20
25
32
40
64
16
20
25
32
40
50
63
80
LAS
Accessories
The load capacities of bearing and ball screw drive must be kept in reasonable balance.
Single parts
Page
Slotted nut
132
NMA, NMZ
Assembly tool for
133
NMA/NMZ/NMG
Ring nut GWR
133
Front lube unit
134
Measuring pads
139
Arrestor nut
139
Acceptance conditions
Page
142
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