Rexroth: Screw Assemblies. Catalog (R999001185/2020-03) - page 1
Screw Assemblies
Ball Screw Assemblies BASA/Planetary Screw Assemblies PLSA
2
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
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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.
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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.
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7
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
Introduction of the B flange
The C flange in the series FEM-E-C and FDM-E-C is replaced
by the B flange. The nuts of the new design are available
now under the designation FEM-E-B and FDM-E-B. All tech-
nical data remain unchanged. This change is necessary as
the market and DIN favor the B flange.
cc
FEM-E-B
cc FDM-E-B
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-B and Single Nut with flange FED-E-B.
Introduction of the ID number for the screw drive
By the middle of the year, the ID number for the entire screw drive range (BASA and PLSA) was introduced. The ID number
(R0404
) is a serial number, which is already generated in the quotation phase and not only during order processing.
This way, the material number of the requested screw drive is already provided to clients with their quotation.
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Table of contents
Table of contents: Ball screw assemblies
New features at a glance
8
Accessories
92
Overview
92
Table of contents
9
Nut housing MGS
94
Nut housing MGD
96
Product overview
10
Nut housing MGA
98
Nuts and Nut Housings
10
Pillow Block Unit SEC-F assembly, aluminum
100
Screws
12
Pillow Block Unit SEC-L assembly, aluminum
102
Bearing
14
Pillow Block Unit SES-F assembly, steel
104
Accessories
15
Pillow Block Unit SES-L assembly, steel
106
Definition of Ball Screw Assembly
16
Pillow Block Unit SEB-F assembly
108
Ball Screw Assemblies for all applications
18
Pillow Block Unit SEB-L assembly
110
Flange bearing assembly SEE-F-Z
112
Sample applications
19
Bearing assembly LAF
114
Bearing assembly LAN
116
Inquiries and orders
20
Bearing assembly LAD
118
Bearing assembly LAL
120
Nuts, miniature series
24
Bearing assembly LAS
122
Overview of formats
24
Slotted Nuts NMA, NMZ and NMG for fixed bearings
124
Single nut with flange FEM-E-B
25
Assembly tool for slotted nut
125
Single nut with flange FEM-E-S
26
Ring nut GWR
125
Adjustable-preload single nut SEM-E-S
27
Ball Screw Assembly with front lube unit
126
Cylindrical Single Nut ZEM-E-S/ZEM-E-K
28
Measuring pads
131
Screw-in nut ZEV-E-S
29
Arrestor nut
131
Nuts, Speed Series
30
Technical data
132
Single nut with flange with recirculation caps FEP-E-S
31
Technical notes
132
Acceptance Conditions and Tolerance Grades
134
Nuts, standard series
32
Preload and rigidity
138
Overview of formats
33
Frictional torques of the seals
144
Single nut with flange FEM-E-S
34
Single nut with flange FEM-E-B
36
Installation
146
Adjustable-preload single nut SEM-E-S
38
Adjustable-preload single nut SEM-E-C
40
Lubrication
150
Cylindrical Single Nut ZEM-E-S / ZEM-E-K / ZEM-E-A
42
Grease lubrication
150
Screw-in nut ZEV-E-S
44
Grease lubrication
152
Double nut with flange FDM-E-S
46
Oil lubrication
158
Double nut with flange FDM-E-B
48
Lubricants
162
Nuts, high-performance series
50
Calculation and examples
164
Nuts, high-performance series
50
Calculation
164
Single nut with flange FED-E-B
52
Critical speed ncr
168
Driven single nut with flange FAR-B-S
54
Permissible axial load on screw Fc (buckling load)
169
Design of drive unit FAR-B-S
170
Screws
56
End Bearings
178
Screw ends
58
Design notes, installation
178
Abbreviations
59
Mounting the housing
179
Lubrication of the end bearings
180
Calculation
181
Design Calculation Service Form
183
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-B
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-B
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
94
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
96
for standard series
32
A
B
C
A
B
C
A
B
C
A
B
C
A
FEM-E-B
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-B
FED-E-B
63
A
B
B
B
MGA
80
A
B
B
98
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
100
SEC-L
102
Lead P
1
2
2.5
5
10
12
16
20
25
30
32
40
64
6
A
A
SES-F
8
A
A
A
A
104
12
A
A
A
16
A
A
A
20
A
B
C
D
A
B
C
D
A
B
C
D
D
A
B
C
SES-L
106
25
A
C
D
A
C
D
A
C
32
A
B
C
D
A
B
C
D
A
B
C
D
D
A
B
C
A
B
C
40
A
B
C
D
A
B
C
D
A
B
C
A
B
C
A
B
C
D
A
B
C
A
B
C
A
B
C
D
50
A
D
A
D
A
A
A
D
A
A
A
D
SEB-F
108
63
A
A
A
80
A
A
A = SEB-F and SEB-L
SEB-L
110
B = SEC-F and SEC-L
C = SES-F and SES-L
D = SEE-F
SEE-F-Z
112
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