28mm Length Bearings | McMaster-Carr

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Threading Threading

	Fully Threaded

	Bearing Material Bearing Material

Stainless Steel

Aluminum

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39 Products

About Linear Bearings

About Plain Bearings

Selecting Compatible Lead Screws and Nuts

Startup friction causes these porous bronze bearings to release a thin layer of oil on the bearing’s surface. They are also known as Oilite® bearings.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

Metric 841 Bronze Bearings

For 18 mm Shaft Dia.
For Housing ID, mm	Lg., mm	Dynamic Radial Load Capacity	Lubrication	Lubricant	Temperature Range, °F		Each
22	28	1,550 lbs. @ 60 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	00000
For 25 mm Shaft Dia.
30	28	2,150 lbs. @ 60 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	0000
For 28 mm Shaft Dia.
32	28	2,400 lbs. @ 30 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	00000
For 35 mm Shaft Dia.
44	28	3,000 lbs. @ 30 rpm	Lubricated	SAE 30 Oil	-35° to 300°	00000000	00000

Light Duty Dry-Running Sleeve Bearings

Use where high loads and speeds are not required.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

Metric Nylon Bearings
For Housing ID	Lg.	Dynamic Radial Load Capacity	Color	Temperature Range, °F		Each
For 28mm Shaft Dia.
32mm	28mm	350 lbs. @ 30 rpm	Off-White	-10° to 220°	0000000	000000

Multipurpose Sleeve Bearings

These 660 leaded bronze bearings are strong, wear resistant, and excellent at handling shock loads. They’re sometimes called 932 bronze bearings.

Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.

For technical drawings and 3-D models, click on a part number.

Metric 660 Leaded Bronze Bearings
For Housing ID	Lg.	Dynamic Radial Load Capacity	Lubrication	Temperature Range, °F		Each
For 12mm Shaft Dia.
16mm	28mm	2,050 lbs. @ 120 rpm	Required	-350° to 450°	00000000	000000
18mm	28mm	2,050 lbs. @ 120 rpm	Required	-350° to 450°	00000000	00000

Ultra-Thin Linear Sleeve Bearings

Thinner than standard linear sleeve bearings, these bearings fit where clearance is a concern. Pair them with round end-supported shafts. They have fixed alignment, so they’re best for applications where shaft misalignment is unlikely. The PTFE lining stands up to chemicals and won’t scratch the shaft. To install, slide them into a housing (not included).

For technical drawings and 3-D models, click on a part number.

Fixed Alignment
For Shaft Diameter, mm	Overall Length, mm	For Housing ID, mm	With Retaining Ring Grooves	Dynamic Load Capacity	Static Load Capacity, lbs.	Shaft Clearance, mm	Temperature Range, °F	For Shaft Material		Each
PTFE-Lined 6061 Aluminum Bearings
12	28	19.000 to 19.021	No	250 lbs. @ 100 fpm	1,950	0.038	-400° to 375°	Stainless Steel, Steel	0000000	000000
14	28	21.000 to 21.021	No	300 lbs. @ 100 fpm	2,250	0.038	-400° to 375°	Stainless Steel, Steel	0000000	00000

High-Speed Ultra-Thin Linear Sleeve Bearings

Use these ultra-thin sleeve bearings in high-speed applications where clearance is a concern. They have a ceramic liner to achieve high speeds and allow rapid acceleration and deceleration. Pair them with round end-supported shafts. These fixed-alignment bearings are for use where shaft misalignment is unlikely. To install, slide them into a housing (not included).

For technical drawings and 3-D models, click on a part number.

Fixed Alignment
For Shaft Diameter, mm	Overall Length, mm	For Housing ID, mm	Dynamic Load Capacity	Static Load Capacity, lbs.	Shaft Clearance, mm	Temperature Range, °F	For Shaft Material		Each
Ceramic-Lined 6061 Aluminum Bearings
12	28	19.000 - 19.021	250 lbs. @ 100 fpm	1,950	0.038	-200° to 400°	Stainless Steel, Steel	0000000	000000
14	28	21.000 - 21.021	300 lbs. @ 100 fpm	2,250	0.038	-200° to 400°	Stainless Steel, Steel	0000000	00000

Food Industry Linear Sleeve Bearings

Without Retaining Ring Grooves

Made of FDA-listed materials for use in food applications, these bearings also have excellent chemical and corrosion resistance. They have a fixed-alignment design for applications where shaft misalignment is unlikely. To install, slide bearings into a housing (not included).

For technical drawings and 3-D models, click on a part number.

Fixed Alignment
For Shaft Dia.	Overall Lg.	For Housing ID	With Retaining Ring Grooves	Dynamic Load Capacity	Static Load Capacity, lbs.	Shaft Clearance	Temperature Range, ° F	For Shaft Material	Specifications Met		Each
Rulon 641-Lined 304 Stainless Steel Bearings
12mm	28mm	19.000mm - 19.021mm	No	50 lbs. @ 100 fpm	115	0.05mm	-400° to 375°	Aluminum, Stainless Steel	FDA Compliant 21 CFR 177.1380	000000	000000

Metric Ball Screws and Nuts

Internal ball bearings provide smooth low-friction travel in applications that require high speeds, accurate positioning, and repeatable movement. Also known as single-start ball screws and nuts, these have a single thread that runs the length of the screw. They operate with more torque than fast-travel ball screws and nuts. To ensure compatibility, select components that have the same thread size and travel distance per turn. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.

Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.

For technical drawings and 3-D models, click on a part number.

Ball Screws with Flange Ball Nut—Right-Hand Threaded

Root diameter indicates the diameter the ball screw will be after machining away the threads.

	Ball Screw			Flange Ball Nut
Thread Size	Lg., mm	Root Dia., mm	Tensile Strength, psi	Lg., mm	Dia., mm	No. of Thread Starts	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Dynamic Thrust Load Cap., lbs.	Max. Backlash, mm	Temperature Range, °F		Each
Carbon Steel Ball Screw with Alloy Steel Flange Ball Nut
M8	150	6.6	21,000	28	20	1	2	±0.210 mm per 300 mm	Rockwell C58	470	0.05	5° to 175°	0000000	0000000
M8	250	6.6	21,000	28	20	1	2	±0.210 mm per 300 mm	Rockwell C58	470	0.05	5° to 175°	000000	000000
M10	200	8.6	21,000	28	23	1	2	±0.210 mm per 300 mm	Rockwell C58	510	0.05	5° to 175°	0000000	000000
M10	300	8.6	21,000	28	23	1	2	±0.210 mm per 300 mm	Rockwell C58	510	0.05	5° to 175°	000000	000000

Metric Press-Fit Drill Bushings

Also known as jig bushings, these metric drill bushings fit inside fixture plate holes to guide drill bits, counterbores, reamers, and other cutting tools. They improve accuracy so that your drilled holes and cuts are consistent from part to part. Known for their versatility, drill bushings are also used as spacers, shims, and machinery bushings. These bushings are made of hardened, ground steel that holds its shape and resists wear, so they last for many cycles without needing to be replaced.

All bushings have a chamfer on the outside that centers the bushing as you place it into the hole. Press into place with a manual or hydraulic press. They also have internal chamfers, so it's easier to insert bits, pins, and punches into the bushing. Some bushings have internal chamfers on both ends, so no matter which end of the bushing is inserted into your jig, your bits, pins, and other tooling enter easily. Having an internal chamfer on the bottom of your bushing may cause shavings to get caught and bind as you remove the bit, however.

DIN 179 bushings meet dimensional and material standards that make sure they're compatible with other parts and tools. Although DIN 179 is no longer an active standard, it's still a common reference point for designers.

Don't see the size you need? Additional sizes are available.

For technical drawings and 3-D models, click on a part number.

				Tolerance							Each
OD, mm	Lg., mm	Internal Chamfer	For Drill Bit Size	ID, mm	OD, mm	Lg., mm	Drill Bushing Type	Material	Hardness		1-5	6-11	12-Up
12 mm ID
22	28	One End	12 mm	0.006 to 0.017	0.035 to 0.048	-0.35 to 0.35	PM	Steel	Rockwell C61	000000000	000000	00000	00000
12.5 mm ID
22	28	Both Ends	12.5 mm	0.016 to 0.034	0.015 to 0.028	-0.2 to 0.2	PM	Steel	Rockwell C61	000000000	00000	00000	00000
22	28	One End	12.5 mm	0.016 to 0.034	0.015 to 0.028	-0.4 to 0.4	PM	Steel	Rockwell C61	0000000	00000	00000	00000
13 mm ID
22	28	Both Ends	13 mm	0.016 to 0.034	0.015 to 0.028	-0.2 to 0.2	PM	Steel	Rockwell C61	000000000	00000	00000	00000
22	28	One End	13 mm	0.016 to 0.034	0.015 to 0.028	-0.4 to 0.4	PM	Steel	Rockwell C61	0000000	00000	00000	00000

				Tolerance								Each
OD, mm	Lg., mm	Internal Chamfer	For Drill Bit Size	ID, mm	OD, mm	Lg., mm	Drill Bushing Type	Material	Hardness	Specifications Met		1-5	6-11	12-Up
13.5 mm ID
22	28	One End	13.5 mm	0.016 to 0.034	0.015 to 0.028	-0.4 to 0.4	PM	Steel	Rockwell C61	__	0000000	000000	000000	000000
14 mm ID
22	28	Both Ends	14 mm	0.016 to 0.034	0.015 to 0.028	-0.2 to 0.2	PM	Steel	Rockwell C61	__	000000000	00000	00000	00000
22	28	One End	14 mm	0.016 to 0.034	0.015 to 0.028	-0.4 to 0.4	PM	Steel	Rockwell C61	__	0000000	00000	00000	00000
22	28	One End	14 mm	0.016 to 0.034	0.015 to 0.028	-0.2 to 0.2	PM	Steel	Rockwell C61	DIN 179	000000000	00000	00000	00000
14.5 mm ID
22	28	One End	14.5 mm	0.016 to 0.034	0.015 to 0.028	-0.4 to 0.4	PM	Steel	Rockwell C61	__	0000000	00000	00000	00000

				Tolerance							Each
OD, mm	Lg., mm	Internal Chamfer	For Drill Bit Size	ID, mm	OD, mm	Lg., mm	Drill Bushing Type	Material	Hardness		1-5	6-11	12-Up
15 mm ID
22	28	Both Ends	15 mm	0.016 to 0.034	0.015 to 0.028	-0.2 to 0.2	PM	Steel	Rockwell C61	000000000	000000	000000	000000
22	28	One End	15 mm	0.016 to 0.034	0.015 to 0.028	-0.4 to 0.4	PM	Steel	Rockwell C61	0000000	00000	00000	00000
26	28	One End	15 mm	0.006 to 0.017	0.035 to 0.048	-0.35 to 0.35	PM	Steel	Rockwell C61	000000000	00000	0000	0000
15.25 mm ID
26	28	One End	15.25 mm	0.006 to 0.017	0.035 to 0.048	-0.4 to 0.4	PM	Steel	Rockwell C61	0000000	00000	00000	00000
15.5 mm ID
26	28	One End	15.5 mm	0.016 to 0.034	0.015 to 0.028	-0.4 to 0.4	PM	Steel	Rockwell C61	0000000	00000	00000	00000
16 mm ID
26	28	Both Ends	16 mm	0.016 to 0.034	0.015 to 0.028	-0.2 to 0.2	PM	Steel	Rockwell C61	000000000	00000	00000	00000
26	28	One End	16 mm	0.016 to 0.034	0.015 to 0.028	-0.4 to 0.4	PM	Steel	Rockwell C61	0000000	00000	00000	00000
16.5 mm ID
26	28	One End	16.5 mm	0.016 to 0.034	0.015 to 0.028	-0.4 to 0.4	PM	Steel	Rockwell C61	0000000	00000	00000	00000
17 mm ID
26	28	Both Ends	17 mm	0.016 to 0.034	0.015 to 0.028	-0.2 to 0.2	PM	Steel	Rockwell C61	000000000	00000	00000	00000
26	28	One End	17 mm	0.016 to 0.034	0.015 to 0.028	-0.4 to 0.4	PM	Steel	Rockwell C61	0000000	00000	00000	00000
17.5 mm ID
26	28	One End	17.5 mm	0.016 to 0.034	0.015 to 0.028	-0.4 to 0.4	PM	Steel	Rockwell C61	0000000	00000	00000	00000
18 mm ID
26	28	Both Ends	18 mm	0.016 to 0.034	0.015 to 0.028	-0.2 to 0.2	PM	Steel	Rockwell C61	000000000	00000	00000	00000
26	28	One End	18 mm	0.016 to 0.034	0.015 to 0.028	-0.4 to 0.4	PM	Steel	Rockwell C61	0000000	00000	00000	00000

Email Us

About Linear Bearings

About Plain Bearings

Selecting Compatible Lead Screws and Nuts

Oil-Embedded Sleeve Bearings

Light Duty Dry-Running Sleeve Bearings

Multipurpose Sleeve Bearings

Ultra-Thin Linear Sleeve Bearings

High-Speed Ultra-Thin Linear Sleeve Bearings

Food Industry Linear Sleeve Bearings

Metric Ball Screws and Nuts

Metric Press-Fit Drill Bushings