ACSM precision rail guides
ACSM precision rail guides with innovative cage guidance system
ACSM—Consistent refi nement of the SKF patent Back in 1994, SKF was the first bearing supplier to develop a monolithic ACS cage guidance system (Anti Creeping System), to effectively prevent cage creep. This solution has been copied by numerous competitors ever since. Now SKF has consistently refined its own ACS solution into the Anti Creeping System Module (ACSM).
The new ACSM features Module gearing with involute gear wheel
Low friction and a high contact ratio are characteristic features of the involute gearing principle. Since SKF attaches the greatest importance to supreme precision, running accuracy and reliability of all its products, this type of gear wheel is used for the ACSM. Involute gearing
Unlimited freedom
New manufacturing methods have enabled further improvements in the rail geometry to be achieved. The groove bottom in the raceway prism has been eliminated and the end face holes at the rail modules are no longer required. This results in higher system stiffness. Moreover, the gearing runs over the entire rail length continuously so that the “specifi ed stroke” information, needed for the classic ACS, is rendered superfl uous. In this way, customers are not restricted in their freedom when operating the precision rail guides. Optimized geometry without groove bottom and end face hole
ACS
ACSM
Continuous gearing
Only the best goes into our standard products: Corrosion-resistant steel
The semiconductor and food industries as well as the chemical and medical engineering sectors are advancing rapidly. This goes hand in hand with ever increasing demands on the materials and equipment used. The ACSM takes this development into account. Its rails and rolling elements are manufactured from corrosion-resistant steel. In response to frequent customer requests, the gear is now made of high-grade brass as standard.
As is the case with the ACS, the ACSM sizes 3, 6 and 9 are equipped with a segmented cage. This permits individual turning of the rolling elements by 90° along the longitudinal axis in order to adjust them to the load situation and load direction. In this way, the ACSM precision rail guides can be optimally adjusted to customer-specifi c requirements. Individual adjustment of rolling elements
Materials
Rail: Rollers: Cage: Gear:
Unique solution for the accommodation of combined loads
Corrosion-resistant steel X46 Cr13 Bearing steel 100 Cr6 POM Brass CuZn39Pb3
Guided precision now also available in size 2
In order to meet the increasing market demands for miniaturisation, the ACSM series was extended by size 2 rail guides.
Advantages of the ACSM
13 56 99 42 85 28 14 57 00
Axial displacement [mm]
High acceleration, vertical installation and collective loads with uneven preload or uneven load distribution are the primary causes for cage creep. The ACSM prevents the cage from wandering out of its correct position and thus increases the reliability and availability of machines and equipment.
The advantages at a glance:
• Significantly higher acceleration possible • Vertical installation and uneven load distribution possible • Higher accuracy through defined cage positioning • Compatible with other SKF precision rail guides due to identical size and dimensions • Low maintenance requirements and optimised availability of equipment
30 25 20 15 10 5 0 0
10 20 30 40 50 60 70 80 90 100
LWAKE 3 ACSM LWAK 3
Distance travelled [km]
Test parameters LWE 3150 compared to LWRE 3150 ACS Double strokes: 27 million Centric load: 1 000 N Acceleration: 16 g Speed: 3.2 m / s
Comparison of stiffness and stress The improved gearing geometry thanks to modified manufacturing technology results in lower peak loads in the material. This leads to higher system stiffness
ACS ress (von Mises) Reference stress (von Mises) Pa 7
21
Tested quality
x 1e Pa 10,621
5,013 4,456 3,899 3,342 2,785 2,228 1,114 0,557 0,000
and absolute accuracy of the ACSM precision rail guides. Stress on the material is lower and the life expectancy is increased.
ACSM Reference stress (von Mises) Reference stress (von Mises) x 1e7 Pa 7 5,689
x 1e Pa 5,689
5,009
5,009
4,452
4,452
3,896
3,896
3,339 2,783 2,226 1,670
3,339 2,783 2,226 1,670 1,113
1,113
0,557
0,557
0,000
0,000
ACSM dimensions Precision rail guide LWRE J3
J3
J3
DW
DW
A1 G1
DW
B
A1 GB1
B A
A
A G
G
G N
LWRB
A1 G1
J3
N1
J3
J3
N1
A
J2
G2
J1
J1
J
A1 GB1
B
G N
J2 G N J2
Dimensions A B mm 12 6 18 8 31 15 44 22
J1
J L
J1
LWRB 2 LWRE 3 LWRE 6 LWRE 9
B
A1 G1 N1
N1
G NN1
J2
GG2 3
G2
Designation
A
A
3 3 Standard or option E7 (with end face holes)
A1 G1
DW
DW
G N N1
J2 G N J2
DW
L
J1
J L
A1
Attachment holes Dw J J1
J2
5,5 8,7 15,2 21,7
2 4 8 12
2,5 3,5 6 9
15 25 50 100
7,5 12,5 25 50
J1
G – M3 M4 M6 M8
G1 mm 2,55 3,3 5.2 6,8
N
End face holes N1 J3
4,4 6 9,5 10,5
2 3,2 5,2 6,2
2,7 4 6,75 9,75
G2 – M2,5 M3 M5 M6
Cage dimensions and load ratings Cage LWJK 2 ACSM
n x t*
DW
t1
t
DW
t1
t
n x t*
U U L = n x t + 2 xt
1
* One ball is replaced by the L = ACSM n x t gear + 2 wheel xt 1
* Onet ball is replaced by the ACSM gear wheel LWAKE 3, 6, 9 ACSM DW t DW
t3 t3
L = n x t + t3 L = n x t + t3
Designation
Dimensions
LWJK 2 ACSM LWAKE 3 ACSM LWAKE 6 ACSM LWAKE 9 ACSM
Dw mm 2 4 8 12
t
t3
3,9 6,25 11 16
3,9 9 15,3 22
Load ratings for 10 rolling elements per row dynamic static C C0 N 510 650 5 040 8 160 27 200 37 440 62 400 74 880
Suitable rail guide
– LWRB 2 ACSM LWRE 3 ACSM LWRE 6 ACSM LWRE 9 ACSM
G3 mm 3 6 9 9
Available lengths1) 0
LWRB 22) LWRE 3 LWRE 6 LWRE 9 1) 2)
100
200
22
300
400 mm
200 33
300 62
400 113
400
Standard lengths are indicated by light blue triangles Fitted with balls instead of rollers
ACSM precision rail guides in kit packaging Designation
Load ratings2) dynamic C N 2 940 3 380 5 040 6 180 7 270 7 970 9 320 18 260 25 050 31 360 39 240 44 870 52 090 57 310
LWRE 3050 ACSM KIT LWRE 3075 ACSM KIT LWRE 3100 ACSM KIT LWRE 3125 ACSM KIT LWRE 3150 ACSM KIT LWRE 3175 ACSM KIT LWRE 3200 ACSM KIT LWRE 6100 ACSM KIT LWRE 6150 ACSM KIT LWRE 6200 ACSM KIT LWRE 6250 ACSM KIT LWRE 6300 ACSM KIT LWRE 6350 ACSM KIT LWRE 6400 ACSM KIT 1) 2)
Stroke
Rail type 4 pieces
Cage type1) 2 pieces
mm 20 30 45 62 79 94 100 37 71 105 117 151 163 197
– LWRE 3050 ACSM LWRE 3075 ACSM LWRE 3100 ACSM LWRE 3125 ACSM LWRE 3150 ACSM LWRE 3175 ACSM LWRE 3200 ACSM LWRE 6100 ACSM LWRE 6150 ACSM LWRE 6200 ACSM LWRE 6250 ACSM LWRE 6300 ACSM LWRE 6350 ACSM LWRE 6400 ACSM
LWAKE 3 x 5 ACSM LWAKE 3 x 6 ACSM LWAKE 3 x 10 ACSM LWAKE 3 x 13 ACSM LWAKE 3 x 16 ACSM LWAKE 3 x 18 ACSM LWAKE 3 x 22 ACSM LWAKE 6 x 6 ACSM LWAKE 6 x 9 ACSM LWAKE 6 x 12 ACSM LWAKE 6 x 16 ACSM LWAKE 6 x 19 ACSM LWAKE 6 x 23 ACSM LWAKE 6 x 26 ACSM
static C0 4 080 4 900 8 160 10 610 13 060 14 690 17 950 22 460 33 700 44 930 59 900 71 140 86 110 97 340
Note: After cutting, the length of the cage (roller unit) should be at least 2/3 of the entire rail length Basis 55 HRC rounded
Prospective availability of the ACSM 2007 Sept
2008 Oct
LWRB 2*) LWRE 3 LWRE 6 LWRE 9 *)
Fitted with balls instead of rollers
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Contacts Linear motion from SKF www.linearmotion.skf.com Benelux SKF Multitec Benelux B.V. Nederland Tel +31 030 6029 029 Fax +31 030 6029 028 België & Luxembourg Tel +32 25 024 270 Fax +32 25 027 336 E-mail [email protected]
France SKF Equipements Tel +33 1 30 12 73 00 Fax +33 1 30 12 69 09 E-mail [email protected]
Brasil SKF do Brasil Ltda Tel +55 11 461 991 114 Fax +55 11 461 991 99 E-mail [email protected]
Italia SKF Multitec S.p.A. Tel +39 011 22 49 01 Fax +39 011 22 49 233 E-mail [email protected]
Canada SKF Canada Limited Tel +1 416 299 1220 Fax +1 416 299 6548 E-mail [email protected]
Mexico SKF de México S.A. de C.V Tel +52 222 229 4900 Fax +52 222 229 4908 Web www.skf.com.mx
Danmark SKF Multitec Tel +45 65 92 77 77 Fax +45 65 92 74 77 E-mail [email protected]
Norge SKF Multitec Tel +47 22 90 50 00 Fax +47 22 30 28 14 E-mail [email protected]
Deutschland & Österreich SKF Linearsysteme GmbH Tel +49 9721 657 232/233 Fax +49 9721 657 111 E-mail [email protected]
Schweiz SKF LM&PT Tel +41 44 825 81 81 Fax +41 44 825 82 82 E-mail [email protected]
España & Portugal SKF Productos Industriales S.A. Tel +34 93 377 99 07/-77 Fax +34 93 474 2039/-2156 E-mail [email protected]
Suomi SKF Multitec Tel +358 9 615 00 850 Fax +358 9 615 00 851 E-mail [email protected]
Sverige SKF Multitec Tel +46 42 253 500 Fax +46 42 253 545 E-mail [email protected] U.K. SKF (UK) Ltd. Tel +44 1582 496 735 Fax +44 1582 496 574 E-mail [email protected] USA SKF Motion Technologies Tel +1 610 861 4800 Toll free +1 800 541 3624 Fax +1 610 861 3716 E-mail [email protected] Other countries Fax +49 972 657 118 E-mail [email protected]
Represented by:
® SKF is a registered trademark of the SKF Group. © SKF Group 2007 The contents of this publication are the copyright of the publisher and may not be reproduced (even extracts) unless prior written permission is granted. Every care has been taken to ensure the accuracy of the information contained in this publication but no liability can be accepted for any loss or damage whether direct, indirect or consequential arising out of the use of the information contained herein.
Publication 6602 EN Printed in Germany
ACSM—Consistent refi nement of the SKF patent Back in 1994, SKF was the first bearing supplier to develop a monolithic ACS cage guidance system (Anti Creeping System), to effectively prevent cage creep. This solution has been copied by numerous competitors ever since. Now SKF has consistently refined its own ACS solution into the Anti Creeping System Module (ACSM).
The new ACSM features Module gearing with involute gear wheel
Low friction and a high contact ratio are characteristic features of the involute gearing principle. Since SKF attaches the greatest importance to supreme precision, running accuracy and reliability of all its products, this type of gear wheel is used for the ACSM. Involute gearing
Unlimited freedom
New manufacturing methods have enabled further improvements in the rail geometry to be achieved. The groove bottom in the raceway prism has been eliminated and the end face holes at the rail modules are no longer required. This results in higher system stiffness. Moreover, the gearing runs over the entire rail length continuously so that the “specifi ed stroke” information, needed for the classic ACS, is rendered superfl uous. In this way, customers are not restricted in their freedom when operating the precision rail guides. Optimized geometry without groove bottom and end face hole
ACS
ACSM
Continuous gearing
Only the best goes into our standard products: Corrosion-resistant steel
The semiconductor and food industries as well as the chemical and medical engineering sectors are advancing rapidly. This goes hand in hand with ever increasing demands on the materials and equipment used. The ACSM takes this development into account. Its rails and rolling elements are manufactured from corrosion-resistant steel. In response to frequent customer requests, the gear is now made of high-grade brass as standard.
As is the case with the ACS, the ACSM sizes 3, 6 and 9 are equipped with a segmented cage. This permits individual turning of the rolling elements by 90° along the longitudinal axis in order to adjust them to the load situation and load direction. In this way, the ACSM precision rail guides can be optimally adjusted to customer-specifi c requirements. Individual adjustment of rolling elements
Materials
Rail: Rollers: Cage: Gear:
Unique solution for the accommodation of combined loads
Corrosion-resistant steel X46 Cr13 Bearing steel 100 Cr6 POM Brass CuZn39Pb3
Guided precision now also available in size 2
In order to meet the increasing market demands for miniaturisation, the ACSM series was extended by size 2 rail guides.
Advantages of the ACSM
13 56 99 42 85 28 14 57 00
Axial displacement [mm]
High acceleration, vertical installation and collective loads with uneven preload or uneven load distribution are the primary causes for cage creep. The ACSM prevents the cage from wandering out of its correct position and thus increases the reliability and availability of machines and equipment.
The advantages at a glance:
• Significantly higher acceleration possible • Vertical installation and uneven load distribution possible • Higher accuracy through defined cage positioning • Compatible with other SKF precision rail guides due to identical size and dimensions • Low maintenance requirements and optimised availability of equipment
30 25 20 15 10 5 0 0
10 20 30 40 50 60 70 80 90 100
LWAKE 3 ACSM LWAK 3
Distance travelled [km]
Test parameters LWE 3150 compared to LWRE 3150 ACS Double strokes: 27 million Centric load: 1 000 N Acceleration: 16 g Speed: 3.2 m / s
Comparison of stiffness and stress The improved gearing geometry thanks to modified manufacturing technology results in lower peak loads in the material. This leads to higher system stiffness
ACS ress (von Mises) Reference stress (von Mises) Pa 7
21
Tested quality
x 1e Pa 10,621
5,013 4,456 3,899 3,342 2,785 2,228 1,114 0,557 0,000
and absolute accuracy of the ACSM precision rail guides. Stress on the material is lower and the life expectancy is increased.
ACSM Reference stress (von Mises) Reference stress (von Mises) x 1e7 Pa 7 5,689
x 1e Pa 5,689
5,009
5,009
4,452
4,452
3,896
3,896
3,339 2,783 2,226 1,670
3,339 2,783 2,226 1,670 1,113
1,113
0,557
0,557
0,000
0,000
ACSM dimensions Precision rail guide LWRE J3
J3
J3
DW
DW
A1 G1
DW
B
A1 GB1
B A
A
A G
G
G N
LWRB
A1 G1
J3
N1
J3
J3
N1
A
J2
G2
J1
J1
J
A1 GB1
B
G N
J2 G N J2
Dimensions A B mm 12 6 18 8 31 15 44 22
J1
J L
J1
LWRB 2 LWRE 3 LWRE 6 LWRE 9
B
A1 G1 N1
N1
G NN1
J2
GG2 3
G2
Designation
A
A
3 3 Standard or option E7 (with end face holes)
A1 G1
DW
DW
G N N1
J2 G N J2
DW
L
J1
J L
A1
Attachment holes Dw J J1
J2
5,5 8,7 15,2 21,7
2 4 8 12
2,5 3,5 6 9
15 25 50 100
7,5 12,5 25 50
J1
G – M3 M4 M6 M8
G1 mm 2,55 3,3 5.2 6,8
N
End face holes N1 J3
4,4 6 9,5 10,5
2 3,2 5,2 6,2
2,7 4 6,75 9,75
G2 – M2,5 M3 M5 M6
Cage dimensions and load ratings Cage LWJK 2 ACSM
n x t*
DW
t1
t
DW
t1
t
n x t*
U U L = n x t + 2 xt
1
* One ball is replaced by the L = ACSM n x t gear + 2 wheel xt 1
* Onet ball is replaced by the ACSM gear wheel LWAKE 3, 6, 9 ACSM DW t DW
t3 t3
L = n x t + t3 L = n x t + t3
Designation
Dimensions
LWJK 2 ACSM LWAKE 3 ACSM LWAKE 6 ACSM LWAKE 9 ACSM
Dw mm 2 4 8 12
t
t3
3,9 6,25 11 16
3,9 9 15,3 22
Load ratings for 10 rolling elements per row dynamic static C C0 N 510 650 5 040 8 160 27 200 37 440 62 400 74 880
Suitable rail guide
– LWRB 2 ACSM LWRE 3 ACSM LWRE 6 ACSM LWRE 9 ACSM
G3 mm 3 6 9 9
Available lengths1) 0
LWRB 22) LWRE 3 LWRE 6 LWRE 9 1) 2)
100
200
22
300
400 mm
200 33
300 62
400 113
400
Standard lengths are indicated by light blue triangles Fitted with balls instead of rollers
ACSM precision rail guides in kit packaging Designation
Load ratings2) dynamic C N 2 940 3 380 5 040 6 180 7 270 7 970 9 320 18 260 25 050 31 360 39 240 44 870 52 090 57 310
LWRE 3050 ACSM KIT LWRE 3075 ACSM KIT LWRE 3100 ACSM KIT LWRE 3125 ACSM KIT LWRE 3150 ACSM KIT LWRE 3175 ACSM KIT LWRE 3200 ACSM KIT LWRE 6100 ACSM KIT LWRE 6150 ACSM KIT LWRE 6200 ACSM KIT LWRE 6250 ACSM KIT LWRE 6300 ACSM KIT LWRE 6350 ACSM KIT LWRE 6400 ACSM KIT 1) 2)
Stroke
Rail type 4 pieces
Cage type1) 2 pieces
mm 20 30 45 62 79 94 100 37 71 105 117 151 163 197
– LWRE 3050 ACSM LWRE 3075 ACSM LWRE 3100 ACSM LWRE 3125 ACSM LWRE 3150 ACSM LWRE 3175 ACSM LWRE 3200 ACSM LWRE 6100 ACSM LWRE 6150 ACSM LWRE 6200 ACSM LWRE 6250 ACSM LWRE 6300 ACSM LWRE 6350 ACSM LWRE 6400 ACSM
LWAKE 3 x 5 ACSM LWAKE 3 x 6 ACSM LWAKE 3 x 10 ACSM LWAKE 3 x 13 ACSM LWAKE 3 x 16 ACSM LWAKE 3 x 18 ACSM LWAKE 3 x 22 ACSM LWAKE 6 x 6 ACSM LWAKE 6 x 9 ACSM LWAKE 6 x 12 ACSM LWAKE 6 x 16 ACSM LWAKE 6 x 19 ACSM LWAKE 6 x 23 ACSM LWAKE 6 x 26 ACSM
static C0 4 080 4 900 8 160 10 610 13 060 14 690 17 950 22 460 33 700 44 930 59 900 71 140 86 110 97 340
Note: After cutting, the length of the cage (roller unit) should be at least 2/3 of the entire rail length Basis 55 HRC rounded
Prospective availability of the ACSM 2007 Sept
2008 Oct
LWRB 2*) LWRE 3 LWRE 6 LWRE 9 *)
Fitted with balls instead of rollers
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Contacts Linear motion from SKF www.linearmotion.skf.com Benelux SKF Multitec Benelux B.V. Nederland Tel +31 030 6029 029 Fax +31 030 6029 028 België & Luxembourg Tel +32 25 024 270 Fax +32 25 027 336 E-mail [email protected]
France SKF Equipements Tel +33 1 30 12 73 00 Fax +33 1 30 12 69 09 E-mail [email protected]
Brasil SKF do Brasil Ltda Tel +55 11 461 991 114 Fax +55 11 461 991 99 E-mail [email protected]
Italia SKF Multitec S.p.A. Tel +39 011 22 49 01 Fax +39 011 22 49 233 E-mail [email protected]
Canada SKF Canada Limited Tel +1 416 299 1220 Fax +1 416 299 6548 E-mail [email protected]
Mexico SKF de México S.A. de C.V Tel +52 222 229 4900 Fax +52 222 229 4908 Web www.skf.com.mx
Danmark SKF Multitec Tel +45 65 92 77 77 Fax +45 65 92 74 77 E-mail [email protected]
Norge SKF Multitec Tel +47 22 90 50 00 Fax +47 22 30 28 14 E-mail [email protected]
Deutschland & Österreich SKF Linearsysteme GmbH Tel +49 9721 657 232/233 Fax +49 9721 657 111 E-mail [email protected]
Schweiz SKF LM&PT Tel +41 44 825 81 81 Fax +41 44 825 82 82 E-mail [email protected]
España & Portugal SKF Productos Industriales S.A. Tel +34 93 377 99 07/-77 Fax +34 93 474 2039/-2156 E-mail [email protected]
Suomi SKF Multitec Tel +358 9 615 00 850 Fax +358 9 615 00 851 E-mail [email protected]
Sverige SKF Multitec Tel +46 42 253 500 Fax +46 42 253 545 E-mail [email protected] U.K. SKF (UK) Ltd. Tel +44 1582 496 735 Fax +44 1582 496 574 E-mail [email protected] USA SKF Motion Technologies Tel +1 610 861 4800 Toll free +1 800 541 3624 Fax +1 610 861 3716 E-mail [email protected] Other countries Fax +49 972 657 118 E-mail [email protected]
Represented by:
® SKF is a registered trademark of the SKF Group. © SKF Group 2007 The contents of this publication are the copyright of the publisher and may not be reproduced (even extracts) unless prior written permission is granted. Every care has been taken to ensure the accuracy of the information contained in this publication but no liability can be accepted for any loss or damage whether direct, indirect or consequential arising out of the use of the information contained herein.
Publication 6602 EN Printed in Germany
