23 mm ID Bearings | McMaster-Carr

A flange with mounting holes makes it easy to attach a load to these bearings. Create a compact linear and rotary motion system for robots and other applications requiring complex, fast movements, by combining them with ball splines. These bearings move smoothly and precisely even at high speeds along ball splines while grooves on the ball spline transmit rotary power. Clip a retaining ring (not included) into the groove on these bearings to position them in your system.

Splines are alloy steel for high strength and wear resistance. They're hardened only on the outside, so they stand up to repeated motion while keeping their center soft enough to absorb stress from shifting loads. Those with a step-down end have a shoulder near the end to stop gears, sprockets, and bearings.

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

Steel Ball Bearings

For Four Splines

												Groove		Mounting Holes
For Spline Dia., mm	For No. of Splines	Overall Lg., mm	Flange OD, mm	Bolt Circle Dia., mm	OD, mm	Dynamic Load Capacity, lbs.	Static Load Capacity, lbs.	Max. Dynamic Torque, in.-lbs.	Max. Static Torque, in.-lbs.	Max. Temperature, ° F	With Retaining Ring Grooves	Wd., mm	Dia., mm	No. of	Thread Size		Each
23	4	70	60	47	37	2,750	3,600	1,433	2,115	176°	Yes	3.5	36.1	4	M5 × 0.8 mm	00000000	0000000

Steel Splines

Splined End × Step-Down End

Four Splines

					Step
Dia., mm	No. of Splines	Lg., mm	Spline Lg., mm	Root Dia., mm	Dia., mm	Lg., mm	Material		Each
Splined End × Step-Down End
23	4	350	200	20.6	20	150	52100 Alloy Steel	00000000	0000000

Metric Press-Fit Drill Bushings with Head

Shown in Countersunk Hole

Shown in Standard Hole

Even under extreme drilling pressure, these metric bushings won't press through your jig plate. A flanged head on the top of the bushing acts as a stop, preventing it from moving as you push down your drill bit, reamer, or other cutting bit. Drill bushings ensure accurate, consistent cuts and drilled holes from one part to the next. They sometimes also work as spacers, shims, and machinery bushings. Made of hardened, ground steel, these bushings hold their shape and resist wear over time. The flanged head protects your jig plate from damage caused by heavy use.

Although it's no longer an active standard, DIN 172 is still a common reference point for making sure parts are compatible with other parts and tools.

These bushings work in both countersunk and standard drill holes. To install, place the bushing inside the hole in your jig. A chamfered edge on the bottom of the bushing helps center the bushing in the hole. Once centered, press the bushing into the hole with a hydraulic or lever press.

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

		Head		Tolerance								Each
OD, mm	Lg., mm	OD, mm	Thick., mm	ID, mm	OD, mm	Lg., mm	Drill Bushing Type	Material	Hardness	Specifications Met		1-5	6-11	12-Up
23 mm ID
35	15	39	5	0.02 to 0.041	0.017 to 0.033	-0.2 to 0.2	H	Steel	Rockwell C61	DIN 172	000000000	000000	000000	000000
35	31	39	5	0.02 to 0.041	0.017 to 0.033	-0.3 to 0.3	H	Steel	Rockwell C61	DIN 172	000000000	00000	00000	00000
35	40	39	5	0.02 to 0.041	0.017 to 0.033	-0.3 to 0.3	H	Steel	Rockwell C61	DIN 172	000000000	00000	00000	00000

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About Linear Bearings

Mounted Linear Bearings for Ball Splines

Metric Press-Fit Drill Bushings with Head