How the ball screw, lead screw or satellite roller screw is fixed to the application has a direct influence on the efficiency, longevity and performance of the linear system.  ABSSAC stocks a complete range of bearing sets manufactured specifically for use with linear  applications. These bearing designs primarily consist of either thrust or radial bearings that are  housed in a pillow block or flange mount.  Bearing styles are grouped, for convenience, into the following prefixes of BK Type for thrust pillow block fixed, BF Type for radial simple support,  FF Type for flange mount simple support and the FK Type which is a flange mount thrust bearing. 

ABSSAC bearing sets are interchangeable with leading brands and are available to suit shaft sizes from 2mm up to 40mm.  When choosing bearing sets, it is paramount to consider the type of fixing design against the speed of rotation and column loading of the screw. This information is graphically displayed in the catalogue which can be downloaded from the link above. Shown below are some examples of bearing set ups that cater for most critical speed and column loading scenarios. However, ABSSAC's sales engineers will be more than happy to help you with your selection. PDF and Step file downloads are available for each style of bearing from the table below.

Bearing set examples

Fixed Free - BK or FK style to nothing

Simple Simple - BF to BF or FF to FF

Fixed Simple - BK or FK to BF or FF

Fixed Fixed - BK or FK to BK or FK

Other bearing styles are available on request.

Distance between shafts bearing arrangement.jpg

Column loading scenarios

 

Critical load between bearing arrangement a.jpg

 

 

End Journal machining

Supplying ball and lead screws ready to fit into applications often requires ABSSAC to supply product to a customer drawing specification. Employing turning, grinding, milling and straightening techniques optimises the final product. ABSSAC's machining capability gives you a high journal concentricity product which can be applied to all screws regardless of diameter. Working together can reduce customer scrap rates and enable linear solutions that fit into applications every time.  Working directly from dimensional drawings, or if they do not exist,  customer owned samples to reverse engineer. Although all types of end machine detail can be supplied, ABSSAC offers a cost effective basic end journal machining that directly matches the range of support bearings (see example diagrams below). 

Suggested end bearing machining journal dimensions

 img_SupportMachinedendjournalfixed.jpg img_SupportMachinedendjournal.jpg

 

Ball Screw Diameter (mm)Pitch (mm)Pillow Block Thrust BearingPillow Block Thrust BearingFlanged Thrust BearingFlanged Support Bearing
10mm2mmBK6BF6FK6FF6
10mm3mmBK6BF6FK6FF6
10mm4mmBK6BF6FK6FF6
 
12mm3mmBK8BF8FK8FF8
12mm6mmBK8BF8FK8FF8
 
14mm3mmBK10BF10FK10FF10
14mm4mmBK8BF8FK8FF8
14mm6mmBK10BF10FK10FF10
 
16mm4mmBK10BF10FK10FF10
16mm8mmBK10BF10FK10FF10
 
18mm4mmBK12BF12FK12FF12
18mm8mmBK12BF12FK12FF12
 
20mm4mmBK15BF15FK15FF15
20mm8mmBK15BF15FK15FF12
20mm20mmBK12BF12FK12FF12
 
22mm5mmBK15BF15FK15FF15
22mm10mmBK15BF15FK15FF15
 
24mm5mmBK17BF17FK17FF17
24mm10mmBK17BF17FK17FF17
 
25mm3mmBK20BF20FK20FF20
25mm5mmBK17BF17FK17FF17
25mm10mmBK17BF17FK17FF17
25mm25mmBK17BF17FK17FF17
 
26mm5mmBK20BF20FK20FF20
26mm10mmBK20BF20FK20FF20
 
28mm5mm BK20BF20FK20FF20
28mm10mmBK20BF20FK20FF20
 
30mm3mmBK25BF25FK25FF25
30mm4mmBK25BF25FK25FF25
30mm5mmBK20BF20FK20FF20
30mm6mmBK20BF20FK20FF20
30mm12mmBK20BF20FK20FF20
30mm30mmBK20BF20FK20FF20
 
32mm6mm BK25BF25FK25FF25
32mm12mmBK25BF25FK25FF25
 
35mm3mmBK30BF30FK30FF30
35mm4mmBK30BF30FK30FF30
35mm5mmBK25BF25FK25FF25
35mm6mmBK25BF25FK25FF25
35mm8mmBK25BF25FK25FF25
 
36mm6mmBK25BF25FK25FF25
36mm12mmBK25BF25FK25FF25
 
40mm3mmBK30BF30FK30FF30
40mm4mmBK30BF30FK30FF30
40mm5mmBK30BF30FK30FF30
40mm6mmBK30BF30FK30FF30
40mm7mmBK30BF30FK30FF30
40mm8mmBK30BF30FK30FF30
40mm10mmBK30BF30FK30FF30
40mm14mmBK30BF30FK30FF30
40mm40mmBK30BF30FK30FF30
 
44mm7mmBK30BF30FK30FF30
 
45mm8mmBK30BF30FK30FF30
 
50mm3mmBK40BF40FK40FF40
50mm4mmBK40BF40FK40FF40
50mm5mmBK40BF40FK40FF40
50mm6mmBK40BF40FK40FF40
50mm8mmBK40BF40FK40FF40
50mm10mmBK30BF30FK30FF30
 
55mm9mm BK40BF40FK40FF40
 
60mm6mmOn RequestOn RequestOn RequestOn Request
60mm7mmOn RequestOn RequestOn RequestOn Request
60mm9mmOn RequestOn RequestOn RequestOn Request
 
70mm10mmOn RequestOn RequestOn RequestOn Request
80mm10mmOn RequestOn RequestOn RequestOn Request
90mm12mmOn RequestOn RequestOn RequestOn Request
95mm16mmOn RequestOn RequestOn RequestOn Request
 
100mm12mmOn RequestOn RequestOn RequestOn Request
100mm16mmOn RequestOn RequestOn RequestOn Request
 
120mm14mmOn RequestOn RequestOn RequestOn Request
120mm16mmOn RequestOn RequestOn RequestOn Request
 
140mm14mmOn RequestOn RequestOn RequestOn Request
To Suit Bearing TypeBallscrew SizeD1D2D3L1L2L3W1W2
BK/FK 10168.0M10X1.010.055.015.012.02.02.8
BK/FK 1216/2010.0M12X1.012.039.020.012.03.03.2
BK/FK 152012.0M15X1.015.067.025.012.04.03.5
BK/FK 1720/2515.0M17X1.017.077.023.014.05.04.5
BK/FK 202516.0M20X1.020.088.034.014.05.05.0
BK/FK 253220.0M25X1.525.0103.039.016.05.07.0
BK/FK 304025.0M30X1.530.0114.046.016.08.08.5
BK/FK 405032.0M40X1.540.0139.055.018.08.012.0

 

Drawings in PDF and STP:

BK10PDF   STP BF10PDF   STP
FK10PDF   STPFF10PDF   STP
BK12PDFBF12PDF
FK12PDF   STPFF12PDF   STP
BK15 BF15PDF   STP
FK15PDF   STPFF15PDF   STP
BK17STPBF17STP
FK17STPFF17STP
BK20PDF   STPBF20PDF   STP
FK20PDF   STPFF20PDF   STP
BK25PDF   STPBF25PDF   STP
FK25PDF   STPFF25PDF   STP
BK30PDF   STPBF30PDF   STP
FK30PDF   STPFF30STP
BK35PDF   STPBF35PDF   STP
FK35 FF35 
BK40PDF   STPBF40PDF   STP
FK40 FF40 

 

Other Abssac services and products

To compliment our product ranges we offer a large range of support products. For example we have had great success in producing copies of lead and ball screws where no formal drawing exists. Customers have shipped the parts for us to dimensionally check and copy into a new physical part. Ancillary products can also include the ranges of lubricants we supply, including our low vapour pressure greases for clean room and vacuum applications. The new Trigel line is specifically formulated to offer a lubrication solution for a wide range of linear motion applications. Other services available from Abssac are listed below

  • Greases and lubricants for ball and lead screws
  • Wiper kits for ball and lead screws
  • Mounting flanges for ball nuts
  • NEMA sized bearing mounts
  • Vacuum environment compatible products

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