Linear Motion Products

ReliaMark linear products provide a reliable resource for linear assemblies at an affordable price. Made in conformance with industry standards, our self-aligning linear ball bearings are available with either nylon composite or precision steel housings, with or without wipers and in both open and closed configurations. ReliaMark’s full line of linear products includes both open and closed linear bearings, standard and twin pillow blocks as well as shaft supports to accommodate shafts from 1/4″ to 2″ in diameter.

ReliaMark Linear Motion Products

Precision Steel Linear Bearings

Precision Steel Open

For pricing and availability, please click a part number.

Part Number Dimensions Maximum Dynamic Load Capacity (lbf)
Without Wipers With Wipers Shaft Diameter “d” Outside Diameter D Length C Retaining Ring Groove Width C1 Distance Between Retaining Ring Grooves C2 Mass (lb) Housing Bore Diameter Norm. Fit
OPN-81420-RM OPN-81420-DD-RM .4995/.4990 .8750/.8746 1.250 .046 .967/.951 .07 .8760/.8740 60
OPN-122026-RM OPN-122026-DD-RM .7495/.7490 1.2500/1.2496 1.625 .056 1.170/1.154 .17 1.2510/1.2490 140
OPN-162536-RM OPN-162536-DD-RM .9995/.9990 1.5625/1.5621 2.250 .068 1.759/1.741 .32 1.5635/1.5615 240
OPN-203242-RM OPN-203242-DD-RM 1.2495/1.2490 2.0000/1.9995 2.625 .068 2.009/1.991 .90 2.0010/1.9990 400
OPN-243848-RM OPN-243848-DD-RM 1.4994/1.4989 2.3750/2.3745 3.000 .086 2.415/2.397 1.12 2.3760/2.3740 600
OPN-324864-RM OPN-324864-DD-RM 1.9940/1.9987 3.0000/2.9994 4.000 .103 3.195/3.177 2.16 3.0010/2.9990 800

Precision Steel Closed

For pricing and availability, please click a part number.

Part Number Dimensions Maximum Dynamic Load Capacity (lbf)
Without Wipers With Wipers Shaft Diameter “d” Outside Diameter D Length C Retaining Ring Groove Width C1 Distance Between Retaining Ring Grooves C2 Mass (lb) Housing Bore Diameter Norm. Fit
A4812-RM A4812-DD-RM .2490/.2485 .5000/.4996 .750 .039 .515/.499 .02 .5005/.5000 19
A61014-RM A61014-DD-RM .3740/.3735 .6250/.6246 .875 .039 .640/.624 .06 .6255/.6250 36
A81420-RM A81420-DD-RM .4990/.4985 .8750/.8746 1.250 .046 .967/.951 .08 .8755/.8750 85
A122026-RM A122026-DD-RM .7490/.7485 1.2500/1.2496 1.625 .056 1.170/1.154 .21 1.2505/1.2500 200
A162536-RM A162536-DD-RM .9990/.9985 1.5625/1.5621 2.250 .068 1.759/1.741 .38 1.5630/1.5625 350
A203242-RM A203242-DD-RM 1.2490/1.2485 2.0000/1.9995 2.625 .068 2.009/1.991 1.10 2.0010/2.0000 520
A243848-RM A243848-DD-RM 1.4989/1.4984 2.3750/2.3745 3.000 .086 2.415/2.397 1.43 2.3760/2.3750 770
A324864-RM A324864-DD-RM 1.9981/1.9980 3.0000/2.9994 4.000 .103 3.195/3.177 2.75 3.0010/3.0000 1,100

Self Aligning Linear Bearings

Self Aligning Open

For pricing and availability, please click a part number.

Part Number Dimensions Maximum Dynamic Load Capacity (lbf)
Without Wipers With Wipers Shaft Diameter “d” Number Ball Circuits Housing Bore Diameter D B B1 B2 E a (deg)
SU8-OPN-RM SU8-OPN-DD-RM 0.500 3 0.8755/0.8750 1.250/1.230 1.032/1.012 0.050 0.32 30 265
SU10-OPN-RM SU10-OPN-DD-RM 0.625 4 1.1255/1.1250 1.500/1.480 1.105/1.095 0.056 0.38 30 420
SU12-OPN-RM SU12-OPN-DD-RM 0.750 5 1.2505/1.2500 1.625/1.605 1.270/1.250 0.056 0.43 30 640
SU16-OPN-RM SU16-OPN-DD-RM 1.000 5 1.5630/1.5625 2.250/2.230 1.884/1.864 0.068 0.56 30 1045
SU20-OPN-RM SU20-DD-OPN-RM 1.250 5 2.0008/2.0000 2.625/2.600 2.004/1.984 0.068 0.63 30 1585
SU24-OPN-RM SU24-DD-OPN-RM 1.500 5 2.3760/2.3750 3.000/2.970 2.410/2.390 0.086 0.75 30 1930

Self Aligning Closed

For pricing and availability, please click a part number.

Part Number Dimensions Maximum Dynamic Load Capacity lbf)
Without Wipers With Wipers Shaft Diameter “d” Number Ball Circuits Housing Bore Diameter D B B1 B2
SU4-RM SU4-DD-RM 0.250 4 0.5005/0.5000 0.750/0.735 0.517/0.497 0.039 60
SU6-RM SU6-DD-RM 0.375 4 0.6255/0.6250 0.875/0.860 0.699/0.689 0.039 105
SU8-RM SU8-DD-RM 0.500 4 0.8755/0.8750 1.250/1.230 1.032/1.012 0.050 265
SU10-RM SU10-DD-RM 0.625 5 1.1255/1.1250 1.500/1.480 1.105/1.095 0.056 420
SU12-RM SU12-DD-RM 0.750 6 1.2505/1.2500 1.625/1.605 1.270/1.250 0.056 640
SU16-RM SU16-DD-RM 1.000 6 1.5630/1.5625 2.250/2.230 1.884/1.864 0.068 1,045
SU20-RM SU20-DD-RM 1.250 6 2.0008/2.0000 2.625/2.600 2.004/1.984 0.068 1,585
SU24-RM SU24-DD-RM 1.500 6 2.3760/2.3750 3.000/2.970 2.410/2.390 0.086 1,930

Pillow Blocks

Pillow Blocks Open

For pricing and availability, please click a part number.

Part Number Shaft Diameter H +/– .003 H1 A A1 A2 B E +/– .010 E1 +/– .010 E2 F1 Hole Diameter N N Bolt Mass (lb) Load Rating (lbf)
PB8-OPN-RM 0.500 0.687 1.13 2.00 0.69 0.75 1.50 1.000 1.688 .31 .25 .16 #6 0.2 230
PB10-OPN-RM 0.625 0.875 1.44 2.50 0.88 0.94 1.75 1.125 2.125 .37 .28 .19 #8 0.4 320
PB12-OPN-RM 0.750 0.937 1.56 2.75 0.94 1.00 1.88 1.250 2.375 .43 .31 .19 #8 0.5 470
PB16-OPN-RM 1.000 1.187 2.00 3.25 1.19 1.25 2.63 1.750 2.875 .56 .38 .22 #10 1.0 780
PB20-OPN-RM 1.250 1.500 2.56 4.00 1.50 1.63 3.38 2.000 3.500 .62 .44 .22 #10 2.1 1,170
PB24-OPN-RM 1.500 1.750 2.94 4.75 1.75 1.88 3.75 2.500 4.125 .75 .50 .28 1/4 3.2 1,560

Pillow Blocks Closed

For pricing and availability, please click a part number.

Part Number Shaft Diameter H +/– .003 H1 A A2 B E +/– .010 E1 +/– .010 F F1 Hole Diameter N N Bolt Mass (lb) Load Rating (lbf)
PB8-RM 0.500 0.687 1.25 2.00 1.38 1.69 1.000 1.688 1.13 .25 .16 #6 0.2 255
PB10-RM 0.625 0.875 1.63 2.50 1.75 1.94 1.125 2.125 1.44 .28 .19 #8 0.5 450
PB12-RM 0.750 0.937 1.75 2.75 1.86 2.06 1.250 2.375 1.56 .31 .19 #8 0.6 600
PB16-RM 1.000 1.187 2.19 3.25 2.38 2.81 1.750 2.875 1.94 .38 .22 #10 1.2 1,050
PB20-RM 1.250 1.500 2.81 4.00 3.00 3.63 2.000 3.500 2.50 .44 .22 #10 2.5 1,500
PB24-RM 1.500 1.750 3.25 4.75 3.50 4.00 2.500 4.125 2.88 .50 .28 1/4 3.8 2,000

Twin Pillow Blocks

Twin Pillow Blocks Open

For pricing and availability, please click a part number.

Part Number Shaft Diameter H +/– .003 H1 A A1 A2 B E +/– .010 E1 +/– .010 E2 F1 Hole Diameter N N Bolt Mass (lb) Load Rating (lbf)
PB8-TWN-OPN-RM 0.500 0.687 1.13 2.00 .69 .75 3.50 2.50 1.688 .31 .25 .16 #6 0.4 460
PB12-TWN-OPN-RM 0.750 0.937 1.56 2.75 .94 1.00 4.50 3.50 2.375 .43 .31 .19 #8 1.0 940
PB16-TWN-OPN-RM 1.000 1.187 2.00 3.25 1.19 1.25 6.00 4.50 2.875 .56 .38 .22 #10 2.0 1,560

Twin Pillow Blocks Closed

For pricing and availability, please click a part number.

Part Number Shaft Diameter H +/– .003 H1 A A2 B E +/– .010 E1 +/– .010 F F1 Hole Diameter N N Bolt Mass (lb) Load Rating (lbf)
PB8-TWN-RM 0.500 0.687 1.25 2.00 1.38 3.50 2.50 1.688 1.13 .25 .16 #6 0.4 510
PB12-TWN-RM 0.750 0.937 1.75 2.75 1.86 4.50 3.50 2.375 1.56 .31 .19 #8 1.2 1,200
PB16-TWN-RM 1.000 1.187 2.19 3.25 2.38 6.00 4.50 2.875 1.94 .38 .22 #10 2.4 2,100

Shaft Support Blocks

Shaft Support Blocks

For pricing and availability, please click a part number.

Part Number Shaft Diameter h +/– .001 E +/– .0005 W L F G P B +/– .01 S Bolt # Mass (lb)
SES8-RM 0.500 1.0000 1.0000 2.000 0.625 1.625 .250 0.875 1.500 .188 #8 0.075
SES12-RM 0.750 1.2500 1.2500 2.500 0.750 2.063 .313 1.250 2.000 .218 #10 0.156
SES16-RM 1.000 1.5000 1.5315 3.063 1.000 2.500 .375 1.500 2.500 .281 1/4 0.294
SES20-RM 1.250 1.7500 1.8750 3.750 1.125 3.000 .438 2.000 3.000 .346 5/16 0.531
SES24-RM 1.500 2.0000 2.1875 4.375 1.250 3.437 .500 2.250 3.500 .346 5/16 0.725
SES32-RM 2.000 2.5000 2.7500 5.500 1.500 4.375 .625 3.000 4.500 .406 3/8 1.400