20.03mm ID Bearings | McMaster-Carr

Leave the lubricant in the supply closet—these low-maintenance bearings are made from naturally slippery plastic. They'll keep shafts spinning with no messy grease to drip off, wash out, or collect dust. With no moving parts, sleeve bearings stand up to grimy environments better than ball bearings. However, with more friction generated, they're less effective at high speeds. The sturdy housing supports the shaft and secures with a two-bolt flange, the most common type of flanged bearing.

Acetal—The most common choice for plastic bearings, acetal is wear-resistant and affordable.

Ultra-Low-Friction PTFE-Filled Acetal—Made from a special blend of acetal and PTFE, these extra-slippery bearings are ideal for conveyors and other machinery with frequent starts and stops.

Aluminum Housing—One-third the weight of cast iron but not as strong. Aluminum also resists corrosion.

Misalignment Capability—Bearings compensate for as much shaft misalignment as the degree listed. This extends the life of the bearing and protects against wear if shafts are slightly askew.

		Overall, mm
	For Shaft Dia., mm	Lg.	Wd.	Flange Thk., mm	Dynamic Radial Load Cap. @ Speed	Misalignment Capability		Each
Acetal Bearing with Aluminum Housing



		20	82.5	21.5	6.4	160 lb. @ 60 rpm	5°	8420N129	000000


		Ultra-Low-Friction PTFE-Filled Acetal Bearing with Aluminum Housing



				20	82.6	21.5	6.4	370 lb. @ 60 rpm	5°	4385N129	00000

Oil-Embedded Panel-Mount Sleeve Bearings

Reduce upkeep with sleeve bearings that lubricate themselves. Made from porous, oil-saturated bronze, they release a thin film of lubrication upon startup to keep shafts spinning. With no moving parts, sleeve bearings withstand dusty, dirty environments better than ball or roller bearings. However, with more friction generated, they're less effective at high speeds. They mount securely in thin panels.

Steel Housing—Best for dry environments as moisture will cause them to rust.

Clinch Panel Mount—Secure these self-clinching bearings into sheet metal panels for a permanent hold. Install them using an air-powered or hydraulic press—no need for precision-bored holes or machined mounts. They're not for use in plastic panels.

Misalignment Capability—Bearings compensate for as much shaft misalignment as the degree listed. This extends the life of the bearing and protects against wear if shafts are slightly askew.

	Flange OD, mm	Flange Thk., mm	Dynamic Radial Load Cap. @ Speed	Misalignment Capability		Each
840 Bearing Bronze Bearing with Steel Housing







	Clinch Panel Mount

	20	31.8	22.5	33	2.3	1,350 lb. @ 60 rpm	5°	2032N31	000000

Dry-Running Mounted Sleeve Bearings

Acetal—The most common choice for plastic bearings, acetal is wear-resistant and affordable.

Aluminum Housing—One-third the weight of cast iron but not as strong. Aluminum also resists corrosion.

Misalignment Capability—Bearings compensate for as much shaft misalignment as the degree listed. This extends the life of the bearing and protects against wear if shafts are slightly askew.

			Overall, mm
	For Shaft Dia., mm	Ctr. Ht., mm	Lg.	Wd.	Dynamic Radial Load Cap. @ Speed	Misalignment Capability		Each
Acetal Bearing with Aluminum Housing



		20	19	82.6	21.5	160 lb. @ 60 rpm	5°	4393N33	000000

Light Duty Dry-Running Mounted Sleeve Bearings with Two-Bolt Flange

With simple, lightweight designs, these bearings are a cost-effective option when extreme precision isn't necessary. Less stable than bearings with forged, one-piece housings, they're good for hand-cranked systems, gravity feed conveyor rollers, and other low-speed applications. Inside, the sleeve is made of naturally slick plastic that doesn't require lubrication. They'll keep shafts spinning with no messy grease to drip off, wash out, or collect dust. With no moving parts, sleeve bearings stand up to grimy environments better than ball bearings. However, with more friction generated, they're less effective at high speeds. The housing mounts in place with a two-bolt flange, the most common type of flanged bearing.

Ultra-Low-Friction PTFE-Filled Acetal—Made from a special blend of acetal and PTFE, these extra-slippery bearings are ideal for conveyors and other machinery with frequent starts and stops.

Steel Housing—Best for dry environments as moisture will cause them to rust.

Misalignment Capability—Bearings compensate for as much shaft misalignment as the degree listed. This extends the life of the bearing and protects against wear if shafts are slightly askew.

		Overall, mm
	For Shaft Dia., mm	Lg.	Wd.	Flange Thk., mm	Dynamic Radial Load Cap. @ Speed	Misalignment Capability		Each
Ultra-Low-Friction PTFE-Filled Acetal Bearing with Steel Housing



		20	59.8	22.4	2.3	350 lb. @ 60 rpm	5°	5792N26	000000

Oil-Embedded Mounted Sleeve Bearings

Reduce upkeep with sleeve bearings that lubricate themselves. Made from porous, oil-saturated bronze, they release a thin film of lubrication upon startup to keep shafts spinning. With no moving parts, they withstand dusty, dirty environments better than ball bearings. However, with more friction generated, they're less effective at high speeds. The sturdy housing bolts down to support shafts as they turn.

Aluminum Housing—One-third the weight of cast iron but not as strong. Aluminum also resists corrosion.

Misalignment Capability—Bearings compensate for as much shaft misalignment as the degree listed. This extends the life of the bearing and protects against wear if shafts are slightly askew.

			Overall, mm
	For Shaft Dia., mm	Ctr. Ht., mm	Lg.	Wd.	Dynamic Radial Load Cap. @ Speed	Misalignment Capability		Each
840 Bearing Bronze Bearing with Aluminum Housing



		20	19	82.5	22.5	1,400 lb. @ 60 rpm	5°	5912K72	000000