20.04mm ID Bearings | McMaster-Carr

Small but mighty, our thinnest rolling thrust bearings slot into tight spaces and spin at whirring speeds. Their long, slender rollers support thrust loads and reduce friction in everything from machine tool spindles to gearboxes.

A cage holds the rollers in place. You can install these bearings without washers between hardened, ground surfaces for the thinnest profile. If you’re working with unhardened, unground surfaces, you’ll need two washers for the rollers to run on. This three-piece design is easy to lubricate, but the oil will attract dust and grime since it’s exposed.

Steel—Strong and wear resistant. However, these bearings are best for dry environments since moisture will cause them to rust.

	Thrust Bearings										Thin Washers			Thick Washers
	For Shaft Dia., mm	OD, mm	Thk., mm	Cage Material	Dynamic Thrust Load Cap., lb.	Max. Rotation Speed, rpm	Temp. Range, ° F	Specs. Met		Each	Thk., mm		Each	Thk., mm		Each
Steel



		20	35	2	Steel	2,950	10,000	0 to 240	DIN 5405-2	5909K15	00000	1	5909K75	00000	2.75	5909K87	000000

Washers for Needle-Roller Thrust Bearings

Adapt needle-roller thrust bearings to use on unhardened, unground surfaces.

For Shaft Dia., mm	OD, mm	Thk., mm	Washer Material	Specs. Met		Each
20	35	1	Steel	DIN 5405-3, ISO 303	5909K75	00000
20	35	2.75	Steel	—	5909K87	00000

Dry-Running Flanged Sleeve Bearings for Food and Beverage

Made of plastics permitted by the US FDA for contact with food, these bearings won’t release harmful, smelly, and distasteful impurities into your food or beverage production line. These self-lubricating plastics eliminate the need for oil, resulting in less maintenance and improved hygiene. You’ll find them inside food-processing equipment such as mixers, conveyors, and fillers.

Flanged sleeve bearings combine a sleeve and thrust bearing in one. The flange supports thrust loads and prevents the bearing from being pushed out of place. The sleeve is the simplest way to support the load of a rotating shaft while reducing friction. Also known as plain bearings.

Moisture-Resistant Plastic Blend—Similar to UHMW, these bearings will keep their shape after washdowns but won’t hold up to steam cleaning. They're bright blue so they are easy to spot if they fall into your production line.

	For Housing ID, mm	Lg., mm	Flange OD, mm	Flange Thk., mm	Dynamic Radial Load Cap. @ Speed	Dynamic Thrust Load Cap. @ Speed	Color	Temp. Range, ° F	Specs. Met		Each
Moisture-Resistant Plastic Blend



	20	23	11.5	30	1.5	50 lb. @ 60 rpm	85 lb. @ 60 rpm	Blue	-50 to 190	FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 177.1550, FDA Compliant 21 CFR 178.3297	57785K339	00000


	20	23	16.5	30	1.5	70 lb. @ 60 rpm	85 lb. @ 60 rpm	Blue	-50 to 190	FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 177.1550, FDA Compliant 21 CFR 178.3297	57785K341	0000
	20	23	21.5	30	1.5	95 lb. @ 60 rpm	85 lb. @ 60 rpm	Blue	-50 to 190	FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 177.1550, FDA Compliant 21 CFR 178.3297	57785K342	0000

Dry-Running Sleeve Bearings for Food and Beverage

With no moving parts, sleeve bearings are the simplest way to support the load of a rotating shaft while reducing friction. Also known as plain bearings.

	For Housing ID, mm	Lg., mm	Dynamic Radial Load Cap. @ Speed	Color	Temp. Range, ° F	Specs. Met		Each
Moisture-Resistant Plastic Blend



	20	23	10	215 lb. @ 60 rpm	Blue	-50 to 190	FDA Compliant 21 CFR 177.1550	6657K137	00000


	20	23	20	430 lb. @ 60 rpm	Blue	-50 to 190	FDA Compliant 21 CFR 177.1550	6657K138	0000
	20	23	25	540 lb. @ 60 rpm	Blue	-50 to 190	FDA Compliant 21 CFR 177.1550	6657K139	0000