Splined Axles | McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Diameter Diameter

	Length Length

	End Type End Type	Show

	Splined

	End Type End Type	Hide


Straight	Made to Order

Threaded	With Retaining Ring Grooves

Keyed	Tapped

D-Profile	Step Down

Splined

	Number of Splines Number of Splines

	For Motion Type For Motion Type

	Rotary
	Linear and Rotary

	Mechanical Finish Mechanical Finish

Precision Ground

Polished

Turned

	Edge Type Edge Type

	Chamfered

	Spline Length Spline Length

	Spline Diameter Spline Diameter

3/4"

1 1/2"

	Material Material

1045 Carbon Steel

52100 Alloy Steel

	Hardness Rating Hardness Rating

Medium

Very Hard

Not Rated

	Hardness Hardness

Rockwell C15

Rockwell C60

Not Rated

	Yield Strength Yield Strength

50,000 to 69,999 psi

80,000 psi or greater

Not Rated

	Heat Treatment Heat Treatment

Case Hardened

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Step Diameter Step Diameter

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

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

REACH Compliant

	Specifications Met Specifications Met

DIN

ISO

	Surface Smoothness Surface Smoothness

16 microinch

Not Rated

	Maximum Spline Diameter Tolerance Maximum Spline Diameter Tolerance

-0.007"

-0.004"

	Minimum Spline Diameter Tolerance Minimum Spline Diameter Tolerance

32 Products

About Shafts

Splined End × Straight End

With a splined profile on one end, these shafts transmit high rotational loads—good for hydraulic systems, machine tools, and other high-torque applications. Compared to keyed shafts, they last longer, handle higher torque, and do not require as tight of a fit. Shafts are 1045 carbon steel, a general purpose shafting material that balances high strength and good machinability. They are 48" long and have six 12"-long splined grooves on one end. The straight end is turned, ground, and polished for a smooth, round finish. The edges are chamfered to remove sharp corners, reducing damage to bearings, housings, and other components during installation.

Splined End
Dia.	Lg.	No. of Splines	Straight End Dia.	Lg.	Edge Type	Hardness Rating	Hardness	Yield Strength, psi		Each
Inch—1045 Carbon Steel
3/4"	12"	6	1"	48"	Chamfered	Medium	Rockwell C15	85,000	000000	0000000
1"	12"	6	1.5"	48"	Chamfered	Medium	Rockwell C15	85,000	000000	000000
1 1/2"	12"	6	2"	48"	Chamfered	Medium	Rockwell C15	85,000	000000	000000

Splined Shafts for Rotary and Linear Motion

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 carbon 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.

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

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	63,000	00000000	0000000
6	-0.01 to 0	200	-0.05 to 0.05	200	__	__	__	16	Chamfered	57,500	000000000	000000
6	-0.01 to 0	300	-0.05 to 0.05	300	__	__	__	16	Chamfered	57,500	000000000	000000
8	-0.015 to 0	150	-0.7874 to 0.7874	150	__	__	__	16	Chamfered	63,000	00000000	000000
8	-0.01 to 0	200	-0.05 to 0.05	200	__	__	__	16	Chamfered	57,500	000000000	00000
10	-0.02 to 0	300	-0.05 to 0.05	300	__	__	__	16	Chamfered	57,500	000000000	000000
10	-0.02 to 0	600	-0.08 to 0.08	600	__	__	__	16	Chamfered	57,500	000000000	000000
10	-0.015 to 0	200	-0.7874 to 0.7874	200	__	__	__	16	Chamfered	63,000	00000000	000000
13	-0.02 to 0	200	-0.05 to 0.05	200	__	__	__	16	Chamfered	57,500	000000000	00000
13	-0.02 to 0	500	-0.08 to 0.08	500	__	__	__	16	Chamfered	57,500	000000000	000000
13	-0.02 to 0	700	-0.08 to 0.08	700	__	__	__	16	Chamfered	57,500	000000000	000000
16	-0.02 to 0	200	-0.05 to 0.05	200	__	__	__	16	Chamfered	57,500	000000000	000000
16	-0.02 to 0	700	-0.08 to 0.08	700	__	__	__	16	Chamfered	57,500	000000000	000000
20	-0.02 to 0	200	-0.05 to 0.05	200	__	__	__	16	Chamfered	57,500	000000000	000000
20	-0.02 to 0	2,000	-0.08 to 0.08	2,000	__	__	__	16	Chamfered	57,500	000000000	000000
25	-0.02 to 0	200	-0.05 to 0.05	200	__	__	__	16	Chamfered	57,500	000000000	000000
25	-0.02 to 0	500	-0.08 to 0.08	500	__	__	__	16	Chamfered	57,500	000000000	000000
30	-0.02 to 0	300	-0.05 to 0.05	300	__	__	__	16	Chamfered	57,500	000000000	000000
30	-0.02 to 0	1,000	-0.08 to 0.08	1,000	__	__	__	16	Chamfered	57,500	000000000	000000
30	-0.02 to 0	2,000	-0.08 to 0.08	2,000	__	__	__	16	Chamfered	57,500	000000000	00000000
40	-0.02 to 0	400	-0.05 to 0.05	400	__	__	__	16	Chamfered	57,500	000000000	000000
40	-0.02 to 0	700	-0.08 to 0.08	700	__	__	__	16	Chamfered	57,500	000000000	000000
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	57,500	00000000	000000
23	-0.021 to 0	350	-0.7874 to 0.7874	200	20	-0.021 to 0	150	16	Chamfered	57,500	00000000	000000
28	-0.021 to 0	450	-0.7874 to 0.7874	300	25	-0.021 to 0	150	16	Chamfered	57,500	00000000	000000
37.4	-0.025 to 0	550	-0.7874 to 0.7874	400	30	-0.021 to 0	150	16	Chamfered	57,500	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

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About Shafts

Splined Rotary Shafts

Splined Shafts for Rotary and Linear Motion