McMaster-Carr

Search Results

	Diameter Diameter

6 mm

8 mm

	End Type End Type


Splined	Step Down

	For Shaft Diameter For Shaft Diameter

	Linear Bearing Component Linear Bearing Component


Bearing in Housing	Bearing

	Step Diameter Step Diameter

	ID ID

	OD OD

	Mechanical Finish Mechanical Finish

Polished

Precision Ground

Turned

	Overall Length Overall Length

	Spline Length Spline Length

	Maximum Torque Maximum Torque

	Length Length

	Number of Splines Number of Splines

	Hardness Rating Hardness Rating

Very Hard

Not Rated

	Hardness Hardness

Rockwell C60

Not Rated

	Yield Strength Yield Strength

128,000 psi

Not Rated

	Material Material

52100 Alloy Steel

1045 Carbon Steel

	Base Thickness Base Thickness

	Surface Smoothness Surface Smoothness

16 microinch

Not Rated

	Mounting Hole Diameter Mounting Hole Diameter

	Mounting Hole Thread Size Mounting Hole Thread Size

	Bolt Circle Diameter Bolt Circle Diameter

	Flange OD Flange OD

24 Products

About Shafts

About Linear Bearings

Splined on Both Ends

Splined End × Step-Down End

Grooves on the surface of these shafts transmit rotary power while allowing bearings to move freely along the length of the shaft. The edges are chamfered to remove sharp corners, reducing damage to bearings, housings, and other components during installation. All are turned, ground, and polished to tight diameter and straightness tolerances.

Four Splines

Shafts with four splines work with ball spline bearings, which create relatively little friction. They're commonly found in robotic and other automated systems that require complex, fast movements. They don't transmit as much torque as shafts with six splines.

All four-spline shafts are 52100 alloy steel for high strength. They're case-hardened to increase hardness and wear resistance on the surface of the shaft while allowing the center to remain soft for absorbing stresses caused by shifting loads.

Some of our four-spline shafts have a step-down end, which has been ground smooth and round like a standard shaft. Mount bearings, gears, and other round-bore components.

Six Splines

Large, evenly spaced splines transmit high-torque loads, such as those found in hydraulic systems, drivetrains, and machine tools. These shafts work with plain bearings, which means they're not meant for high-speed positioning applications. Made of 1045 steel, they're strong but also machinable, so you can modify the ends to fit into your mounting fixtures. All meet ISO 14-B (formerly DIN 5463-B) to ensure they work with bearings that meet ISO 14-A.

4 Splines (Metric—52100 Alloy Steel)

Four Splines

					Step
Dia., mm	Dia. Tolerance, mm	Lg., mm	Lg. Tolerance, mm	Spline Lg., mm	Dia., mm	Dia. Tolerance, mm	Lg., mm	Surface Smoothness, microinch	Edge Type	Yield Strength, psi		Each
Splined End × Splined End
6	-0.012 to 0	150	-0.7874 to 0.7874	150	__	__	__	16	Chamfered	128,000	00000000	0000000
8	-0.015 to 0	150	-0.7874 to 0.7874	150	__	__	__	16	Chamfered	128,000	00000000	00000
10	-0.015 to 0	200	-0.7874 to 0.7874	200	__	__	__	16	Chamfered	128,000	00000000	00000
Splined End × Step-Down End
18.2	-0.021 to 0	350	-0.7874 to 0.7874	200	15	-0.018 to 0	150	16	Chamfered	128,000	00000000	000000
23	-0.021 to 0	350	-0.7874 to 0.7874	200	20	-0.021 to 0	150	16	Chamfered	128,000	00000000	000000
28	-0.021 to 0	450	-0.7874 to 0.7874	300	25	-0.021 to 0	150	16	Chamfered	128,000	00000000	000000
37.4	-0.025 to 0	550	-0.7874 to 0.7874	400	30	-0.021 to 0	150	16	Chamfered	128,000	00000000	000000

6 Splines (Metric—1045 Carbon Steel)

Six Splines

Splined End × Splined End
Dia., mm	Dia. Tolerance, mm	Lg., mm	Lg. Tolerance	Spline Lg., mm	Surface Smoothness	Edge Type	Yield Strength	Specifications Met		Each
20	-0.07 to -0.027	1,000	Not Rated	1,000	Not Rated	Chamfered	Not Rated	ISO 14-B, DIN 5463-B	000000000	0000000
25	-0.07 to -0.027	1,000	Not Rated	1,000	Not Rated	Chamfered	Not Rated	ISO 14-B, DIN 5463-B	000000000	000000
32	-0.07 to -0.027	1,000	Not Rated	1,000	Not Rated	Chamfered	Not Rated	ISO 14-B, DIN 5463-B	000000000	000000

Mounted Linear Bearings for Spline Shafts

A flanged housing with mounting holes connects these bearings directly to your system. They have a grooved inner diameter that's designed to work with spline shafts. Together, they transmit rotary power while allowing the bearing to move freely along the length of the shaft. Wide and flat, the flange is especially useful for lifting and lowering loads on vertical shafts. All are for use where shaft misalignment is unlikely.

Also known as ball splines, ball bearings run with less friction than plain bearings, so they're smoother and more precise, even at high speeds. However, they don't transmit as much torque as plain bearings. They're commonly used for robotic systems and other automated applications that require complex, fast movements.

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

Steel Ball Bearings with Steel Housing

Ball Bearing

For Four Splines

								Mounting Holes
For No. of Splines	For Shaft Dia., mm	Overall Lg., mm	Flange OD, mm	Bolt Circle Dia., mm	OD, mm	Max. Torque, in.-lbs.	Max. Temperature, ° F	No. of	Thread Size		Each
Fixed Alignment
4	6	25	30	22	14	13	176°	4	M3 × 0.5	00000000	000000
4	8	25	32	24	16	18	176°	4	M3 × 0.5	00000000	00000
4	10	33	42	32	21	38	176°	4	M4 × 0.7	00000000	00000
4	18.2	60	51	40	32	734	176°	4	M4 × 0.7	00000000	000000
4	23	70	60	47	37	1,433	176°	4	M5 × 0.8	00000000	000000
4	28	80	70	54	45	2,557	176°	4	M6 × 1	00000000	000000
4	37.4	100	90	72	60	5,637	176°	4	M8 × 1.25	00000000	000000

Steel Spline Shafts

Splined on Both Ends

Splined End × Step-Down End

Four Splines

				Step
Dia., mm	Lg., mm	Spline Lg., mm	End Type	Dia., mm	Lg., mm		Each
4 Splines
6	150	150	Splined End × Splined End	__	__	00000000	0000000
8	150	150	Splined End × Splined End	__	__	00000000	00000
10	200	200	Splined End × Splined End	__	__	00000000	00000
18.2	350	200	Splined End × Step-Down End	15	150	00000000	000000
23	350	200	Splined End × Step-Down End	20	150	00000000	000000
28	450	300	Splined End × Step-Down End	25	150	00000000	000000
37.4	550	400	Splined End × Step-Down End	30	150	00000000	000000

Linear Bearings for Spline Shafts

With a grooved inner diameter, these bearings are designed to work with splined shafts. Together, they transmit rotary power while allowing the bearing to move freely along the length of the shaft. All are for use where shaft misalignment is unlikely.

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

Steel Ball Bearings

Ball Bearing

For Four Splines

Fixed Alignment
For No. of Splines	For Shaft Dia., mm	Overall Lg., mm	OD, mm	Max. Torque, in.-lbs.	Max. Temperature, °F		Each
4	6	25	14	13	176°	00000000	000000
4	8	25	16	18	176°	00000000	00000
4	10	33	21	38	176°	00000000	00000
4	18.2	60	32	734	176°	00000000	000000
4	23	70	37	1,433	176°	00000000	000000
4	28	80	45	2,557	176°	00000000	000000
4	37.4	100	60	5,637	176°	00000000	000000

Steel Spline Shafts

Splined on Both Ends

Splined End × Step-Down End

Four Splines

				Step
Dia., mm	Lg., mm	Spline Lg., mm	End Type	Dia., mm	Lg., mm		Each
4 Splines
6	150	150	Splined End × Splined End	__	__	00000000	0000000
8	150	150	Splined End × Splined End	__	__	00000000	00000
10	200	200	Splined End × Splined End	__	__	00000000	00000
18.2	350	200	Splined End × Step-Down End	15	150	00000000	000000
23	350	200	Splined End × Step-Down End	20	150	00000000	000000
28	450	300	Splined End × Step-Down End	25	150	00000000	000000
37.4	550	400	Splined End × Step-Down End	30	150	00000000	000000

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About Shafts

About Linear Bearings

Splined Shafts for Rotary and Linear Motion

Mounted Linear Bearings for Spline Shafts

Linear Bearings for Spline Shafts