< Home < Specifications

Pillow Block Specifications

Spyraflo Aluminum Pillow Block Housings come with a choice of Self-Aligning Bearings.  Combining the light weight, clean lines, and dimensional consistency of sintered aluminum with the load carrying capability of Needle Roller Bearings, Teflon-Bronze Bearings, or SAE 840 Bronze plain
bearings, our Pillow Blocks are often able to replace more expensive, larger and heavier weight cast iron / ball bearing assemblies.  The narrow profile of Spyraflo Pillow Blocks, is a benefit and a simple solution to often
expensive Pillow Block mounting challenges. 

Pillow Block Features:

• ±5° Self-Alignment
• Lightweight and Corrosion Resistant
• Slim Profile / Economic Option
• Bronze option is a drop-in replacement for the Bunting Lube-Align product.

  * Max Radial Dyn Load - based on the load being transmitted directly through the mounting hole.

Needle Roller | Pillow Block Bearing I.D. Nominal Shaft Dia. Min/Max A B C D E F G Max. Spd. (rpm) *Max Radial Dyn Load Part No. 1/4" .2495-.2500 9/16 2 1/4 1 3/4 1 1/8 7/16 9/32 1/4 26400 342 lbf PB1-250-N 5/16" .3120-.3125 9/16 2 1/4 1 3/4 1 1/8 5/8 9/32 1/4 21300 390 lbf PB1-312-N 3/8" .3745-.3750 9/16 2 1/4 1 3/4 1 1/8 5/8 9/32 1/4 17700 390 lbf PB1-375-N 1/2" .4995-.5000 3/4 3 1/4 2 1/2 1 9/16 25/32 11/32 5/16 13200 620 lbf PB2-500-N 5/8" .6245-.6500 3/4 3 1/4 2 1/2 1 9/16 7/8 11/32 5/16 10560 1100 lbf PB2-625-N 3/4" .7495-.7500 1 1/4 5.0 4.0 2 9/16 29/32 9/16 9/16 7800 1330 lbf PB4-750-N 6mm 5.992-6.000 14.5 57.0 44.5 28.5 11.0 7.0 6.5 21000 1220 N PB1-6M-N 8mm 7.991-8.000 14.5 57.0 44.5 28.5 11.0 7.0 6.5 16800 1650 N PB1-8M-N 10mm 9.991-10.000 14.5 57.0 44.5 28.5 11.0 7.0 6.5 13800 2640 N PB1-10M-N 12mm 11.989-12.000 19.0 82.5 63.5 39.5 20.0 8.7 8.0 12000 2970 N PB2-12M-N 15mm 14.989-15.000 19.0 82.5 63.5 39.5 20.0 8.7 8.0 9600 4740 N PB2-15M-N 18mm 17.989-18.000 32.0 127.0 101.5 65.0 23.0 14.3 14.5 7800 4860 N PB4-18M-N

Teflon Bronze | Pillow Block Bearing I.D. Nominal Shaft Dia. Min/Max A B C D E F G Max. Spd. (rpm) *Max Radial Dyn Load Part No. 1/4" .2481-.2490 9/16 2 1/4 1 3/4 1 1/8 7/16 9/32 1/4 3610 1020 lbf PB1-250-P 5/16" .3106-.3115 9/16 2 1/4 1 3/4 1 1/8 7/16 9/32 1/4 2890 1270 lbf PB1-312-P 3/8" .3731-.3740 9/16 2 1/4 1 3/4 1 1/8 5/8 9/32 1/4 2410 2040 lbf PB1-375-P 1/2" .4980-.4990 3/4 3 1/4 2 1/2 1 9/16 25/32 11/32 5/16 1810 2720 lbf PB2-500-P 5/8" .6230-.6240 3/4 3 1/4 2 1/2 1 9/16 7/8 11/32 5/16 1440 3400 lbf PB2-625-P 3/4" .7479-.7491 3/4 3 1/4 2 1/2 1 9/16 7/8 11/32 5/16 1200 8158 lbf PB2-750-P 1" .9979-.9991 1 1/4 5 4 2 9/16 29/32 9/16 9/16 900 10877 lbf PB4-1000-P 6mm 5.978-5.990 14.5 57.0 44.5 28.5 11.0 7.0 6.5 3820 5400 N PB1-6M-P 8mm 7.972-7.987 14.5 57.0 44.5 28.5 11.0 7.0 6.5 2860 9600 N PB1-8M-P 10mm 9.972-9.987 14.5 57.0 44.5 28.5 16.0 7.0 6.5 2290 15000 N PB1-10M-P 12mm 11.966-11.984 14.5 57.0 44.5 28.5 16.0 7.0 6.5 1910 18000 N PB1-12M-P 16mm 15.966-15.984 19.0 82.5 63.5 39.5 20.0 8.7 8.0 1430 24000 N PB2-16M-P 18mm 17.966-17.984 19.0 82.5 63.5 39.5 23.0 8.7 8.0 1270 40500 N PB2-18M-P 25mm 24.959-24.980 32.0 127.0 101.5 65.0 23.0 14.3 14.5 920 56250 N PB4-25M-P

Bronze SAE 840 | Pillow Block I.D. Nominal I.D. Actual Min/Max A B C D E F G Max. Speed (rpm) *Max Radial Dyn Load Part No. 1/4" .2508-.2513 9/16 2 1/4 1 3/4 1 1/8 3/8 9/32 1/4 9160 110 lbf PB1-250-B 5/16" .3133-.3140 9/16 2 1/4 1 3/4 1 1/8 7/16 9/32 1/4 7340 160 lbf PB1-312-B 3/8" .3758-.3765 9/16 2 1/4 1 3/4 1 1/8 7/16 9/32 1/4 6110 190 lbf PB1-375-B 1/2" .5010-.5017 9/16 2 1/4 1 3/4 1 1/8 5/8 9/32 1/4 4580 360 lbf PB1-500-B 1/2" .5010 - .5017 1 4 3 1/8 1 15/16 29/32 11/32 13/32 4580 700 lbf PB3-500-B 5/8" .6260-.6270 3/4 3 1/4 2 1/2 1 9/16 25/32 11/32 5/16 3670 530 lbf PB2-625-B 5/8" .6260 - .6270 1 4 3 1/8 1 15/16 29/32 11/32 13/32 3670 800 lbf PB3-625-B 3/4" .7510-.7520 3/4 3 1/4 2 1/2 1 9/16 7/8 11/32 5/16 3060 770 lbf PB2-750-B 3/4" .7510 - .7520 1 4 3 1/8 1 15/16 29/32 11/32 13/32 3060 900 lbf PB3-750-B 7/8" .8760-.8780 1 4 3 1/8 1 15/16 29/32 11/32 13/32 2620 750 lbf PB3-875-B 1" 1.001-1.003 1 1/4 5 4 2 9/16 29/32 9/16 9/16 2290 850 lbf PB4-1000-B 1 1/4" 1.251-1.253 1 1/4 5 4 2 9/16 15/16 9/16 9/16 1830 1320 lbf PB4-1250-B 6mm 6.020-6.040 14.5 57.0 44.5 28.5 9.5 7.0 6.5 9670 480 N PB1-6M-B 8mm 8.020-8.040 14.5 57.0 44.5 28.5 11.0 7.0 6.5 7270 720 N PB1-8M-B 10mm 10.020-10.040 14.5 57.0 44.5 28.5 11.0 7.0 6.5 5820 890 N PB1-10M-B 12mm 12.030-12.050 14.5 57.0 44.5 28.5 16.0 7.0 6.5 4830 1520 N PB1-12M-B 15mm 15.030-15.050 19.0 82.5 63.5 39.5 20.0 8.7 8.0 3880 2250 N PB2-15M-B 18mm 18.030-18.050 19.0 82.5 63.5 39.5 23.0 8.7 8.0 3230 3220 N PB2-18M-B 25mm 25.030-25.070 32.0 127.0 101.5 65.0 23.0 14.3 14.5 2330 3730 N PB4-25M-B 30mm 30.030-30.070 32.0 127.0 101.5 65.0 24.0 14.3 14.5 1940 5550 N PB4-30M-B

More Information:
Pillow Block Overview
Copyright ©2006 Spyraflo. All Rights Reserved.