Splined Axles | McMaster-Carr

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93 Products

About Shafts

Splined Rotary Shafts

Good for hydraulic systems, machine tools, and other high-torque applications, these shafts have teeth that transmit high rotational loads. Compared to keyed shafts, they last longer and handle higher torque. They’re also better than keyed shafts for applications requiring frequent disassembly or adjustments because you can move bushings along their splines.

Parallel splines have large, straight-sided teeth that resemble machine keys and transmit more torque than involute spline teeth. These splines are known as straight splines.

Involute splines have curved teeth, similar to the teeth on a gear. These teeth make more contact with a bushing than the teeth on parallel splines, so these splines are less prone to wear. They handle misalignment and reduce vibration.

Straight ends have a smooth, round finish instead of splines. Use this end with gears, sprockets, and bearings.

Bushings act as a surface to transmit rotary motion or to position a load along the length of the shaft. If welded into place, these bushings can act as a coupler, connecting two splined shafts. Flanged bushings have a surface with mounting holes for you to attach your load.

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

Parallel Spline on Both Ends

Sleeve Bushing for Parallel Spline

Shafts										Flanged Bushings		Sleeve Bushings
Dia.	Spline Lg.	No. of Splines	Lg.	Edge Type	Hardness Rating	Hardness	Specifications Met		Each		Each		Each
Inch—1215 Carbon Steel
1"	10"	6	10"	Chamfered	Not Rated	Not Rated	__	0000000	0000000	000000	00	0000000	000000
1 1/8"	10"	6	10"	Chamfered	Not Rated	Not Rated	__	0000000	000000	000000	00	0000000	00000
1 1/4"	10"	6	10"	Chamfered	Not Rated	Not Rated	__	0000000	000000	000000	00	0000000	000000
1 1/4"	10"	10	10"	Chamfered	Not Rated	Not Rated	__	0000000	000000	000000	00	0000000	000000
1 3/8"	10"	6	10"	Chamfered	Not Rated	Not Rated	__	0000000	00000	000000	00	0000000	00000
1 1/2"	10"	6	10"	Chamfered	Not Rated	Not Rated	__	0000000	000000	000000	00	0000000	000000
1 5/8"	10"	6	10"	Chamfered	Not Rated	Not Rated	__	0000000	000000	000000	00	0000000	000000
1 3/4"	10"	6	10"	Chamfered	Not Rated	Not Rated	__	0000000	000000	000000	00	0000000	000000
Metric—1045 Carbon Steel
20mm	1,000mm	6	1,000mm	Chamfered	Not Rated	Not Rated	DIN 5463-B, ISO 14-B	000000000	000000	000000000	0000000	000000000	000000
25mm	1,000mm	6	1,000mm	Chamfered	Not Rated	Not Rated	DIN 5463-B, ISO 14-B	000000000	000000	000000000	000000	000000000	000000
32mm	1,000mm	6	1,000mm	Chamfered	Not Rated	Not Rated	DIN 5463-B, ISO 14-B	000000000	000000	000000	00	000000000	000000

Parallel Spline End × Straight End

Splined End × Straight End

Sleeve Bushing for Parallel Spline

Shafts
Splined End										Sleeve Bushings
Dia.	Lg.	No. of Splines	Straight End Dia.	Lg.	Edge Type	Hardness Rating	Hardness		Each		Each
Inch—1045 Carbon Steel
3/4"	12"	6	1"	48"	Chamfered	Medium	Rockwell C15	000000	0000000	0000000	000000
1"	12"	6	1 1/2"	48"	Chamfered	Medium	Rockwell C15	000000	000000	0000000	00000
1 1/2"	12"	6	2"	48"	Chamfered	Medium	Rockwell C15	000000	000000	0000000	000000

Involute Spline on Both Ends

Sleeve Bushing for Involute Spline

Shafts											Sleeve Bushings
Dia.	Spline Lg.	No. of Splines	Lg.	Pitch	Pressure Angle	Edge Type	Hardness Rating	Hardness		Each		Each
Inch—1215 Carbon Steel
5/8"	6"	9	6"	0.563"	30°	Chamfered	Not Rated	Not Rated	0000000	0000000	0000000	000000
7/8"	6"	13	6"	0.813"	30°	Chamfered	Not Rated	Not Rated	0000000	000000	0000000	00000
1"	8"	15	8"	0.938"	30°	Chamfered	Not Rated	Not Rated	0000000	000000	0000000	000000
1 1/4"	10"	14	10"	1.167"	30°	Chamfered	Not Rated	Not Rated	0000000	000000	0000000	000000
1 3/8"	10"	21	10"	1.313"	30°	Chamfered	Not Rated	Not Rated	0000000	000000	0000000	000000
1 3/4"	10"	13	10"	1.625"	30°	Chamfered	Not Rated	Not Rated	0000000	000000	0000000	000000
1 3/4"	10"	27	10"	1.688"	30°	Chamfered	Not Rated	Not Rated	0000000	000000	0000000	000000

Ball Splines and Bearings

Create a compact linear and rotary motion system for applications requiring complex, fast movements, such as robotics. The grooves on the ball splines transmit rotary power as ball bearings move smoothly and precisely along their length, even at high speeds.

Ball splines are alloy steel for high strength and wear resistance. They're hardened on the outside for additional wear resistance while the center is 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.

Bearings have a retaining ring groove, so they can be positioned in your system with a retaining ring (not included). Bearings with a keyway include a machine key for attaching your load. Flanged bearings have a surface with mounting holes for attaching your load. Stainless steel bearings are more corrosion resistant than steel bearings.

Ball Splines

Splined on Both Ends

Splined End × Step-Down End

Four Splines

				Spline			Step
Dia., mm	Dia. Tolerance, mm	Lg., mm	Lg. Tolerance, mm	Lg., mm	No. of	Root Dia., mm	Dia., mm	Dia. Tolerance, mm	Lg., mm	Surface Smoothness, microinch	Edge Type	Hardness Rating	Hardness	Heat Treatment		Each
Metric—52100 Alloy Steel
Splined on Both Ends
6	-0.012 to 0	150	-0.7874 to 0.7874	150	4	5.3	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	00000000	0000000
6	-0.01 to 0	200	-0.05 to 0.05	200	4	5.3	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
6	-0.01 to 0	300	-0.05 to 0.05	300	4	5.3	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
8	-0.015 to 0	150	-0.7874 to 0.7874	150	4	7.2	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	00000000	000000
8	-0.01 to 0	200	-0.05 to 0.05	200	4	7.2	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
10	-0.015 to 0	200	-0.7874 to 0.7874	200	4	9	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	00000000	000000
10	-0.02 to 0	300	-0.05 to 0.05	300	4	9	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
10	-0.02 to 0	600	-0.08 to 0.08	600	4	9	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
13	-0.02 to 0	200	-0.05 to 0.05	200	4	11.7	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	00000
13	-0.02 to 0	500	-0.08 to 0.08	500	4	11.7	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
13	-0.02 to 0	700	-0.08 to 0.08	700	4	11.7	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
16	-0.02 to 0	200	-0.05 to 0.05	200	4	14.2	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
16	-0.02 to 0	700	-0.08 to 0.08	700	4	14.2	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
20	-0.02 to 0	200	-0.05 to 0.05	200	4	17.9	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
20	-0.02 to 0	2,000	-0.08 to 0.08	2,000	4	17.9	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
25	-0.02 to 0	200	-0.05 to 0.05	200	4	22.4	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
25	-0.02 to 0	500	-0.08 to 0.08	500	4	22.4	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
30	-0.02 to 0	300	-0.05 to 0.05	300	4	26.8	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
30	-0.02 to 0	1,000	-0.08 to 0.08	1,000	4	26.8	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
30	-0.02 to 0	2,000	-0.08 to 0.08	2,000	4	26.8	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	00000000
40	-0.02 to 0	400	-0.05 to 0.05	400	4	35.5	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
40	-0.02 to 0	700	-0.08 to 0.08	700	4	35.5	__	__	__	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	000000000	000000
Splined End × Step-Down End
18.2	-0.021 to 0	350	-0.7874 to 0.7874	200	4	16.4	15	-0.018 to 0	150	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	00000000	000000
23	-0.021 to 0	350	-0.7874 to 0.7874	200	4	20.6	20	-0.021 to 0	150	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	00000000	000000
28	-0.021 to 0	450	-0.7874 to 0.7874	300	4	24.8	25	-0.021 to 0	150	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	00000000	000000
37.4	-0.025 to 0	550	-0.7874 to 0.7874	400	4	33.1	30	-0.021 to 0	150	16	Chamfered	Very Hard	Rockwell C60	Case Hardened	00000000	000000

Bearings

				Material						Keyway
For Spline Dia., mm	For No. of Splines	Overall Lg., mm	OD, mm	Bearing	Ball	Dynamic Load Cap., lbs.	Max. Dynamic Torque, in.-lbs.	With Retaining Ring Grooves	Includes	Dp., mm	Lg., mm	Wd., mm		Each
6	4	25	14	Steel	Steel	270	13	Yes	Machine Key	1.2	10.5	2.5	00000000	000000
6	4	25	14	Stainless Steel	Stainless Steel	270	13	Yes	Machine Key	1.2	10.5	2.5	00000000	000000
8	4	25	16	Steel	Steel	325	18	Yes	Machine Key	1.2	10.5	2.5	00000000	00000
10	4	33	21	Steel	Steel	610	38	Yes	Machine Key	1.5	13	3	00000000	00000
13	4	36	24	Steel	Steel	600	185	Yes	Machine Key	1.5	15	3	00000000	00000
13	4	36	24	Stainless Steel	Stainless Steel	600	185	Yes	Machine Key	1.5	15	3	00000000	000000
16	4	50	31	Steel	Steel	1,350	531	Yes	Machine Key	2	17.5	3.5	00000000	00000
18.2	4	60	32	Steel	Steel	1,750	734	Yes	Machine Key	2.5	26	4	00000000	000000
25	4	71	42	Steel	Steel	2,850	1,672	Yes	Machine Key	2.5	36	4	00000000	000000
28	4	80	45	Steel	Steel	4,150	2,557	Yes	Machine Key	4	41	7	00000000	000000
30	4	80	47	Steel	Steel	4,150	2,716	Yes	Machine Key	2.5	42	4	00000000	000000
40	4	100	64	Steel	Steel	6,900	5,964	Yes	Machine Key	3.5	52	6	00000000	000000

Flanged Bearings

					Material					Mounting Hole
For Spline Dia., mm	For No. of Splines	Overall Lg., mm	Flange OD, mm	OD, mm	Bearing	Ball	Dynamic Load Cap., lbs.	Max. Dynamic Torque, in.-lbs.	With Retaining Ring Grooves	No. of	Thread Size		Each
6	4	25	30	14	Steel	Steel	270	13	Yes	4	M3 × 0.5 mm	00000000	000000
8	4	25	32	16	Steel	Steel	325	18	Yes	4	M3 × 0.5 mm	00000000	00000
10	4	33	42	21	Steel	Steel	610	38	Yes	4	M4 × 0.7 mm	00000000	000000
13	4	36	43	24	Steel	Steel	600	185	Yes	4	M4 × 0.7 mm	000000000	00000
16	4	50	50	31	Steel	Steel	1,350	531	Yes	4	M4 × 0.7 mm	000000000	000000
18.2	4	60	51	32	Steel	Steel	1,750	734	Yes	4	M4 × 0.7 mm	00000000	000000
20	4	63	58	35	Steel	Steel	2,000	929	Yes	4	M5 × 0.8 mm	000000000	000000
23	4	70	60	37	Steel	Steel	2,750	1,433	Yes	4	M5 × 0.8 mm	00000000	000000
25	4	71	65	42	Steel	Steel	2,850	1,672	Yes	4	M5 × 0.8 mm	000000000	000000
28	4	80	70	45	Steel	Steel	4,150	2,557	Yes	4	M6 × 1 mm	00000000	000000
30	4	80	75	47	Steel	Steel	4,150	2,716	Yes	4	M6 × 1 mm	000000000	000000
37.4	4	100	90	60	Steel	Steel	6,900	5,637	Yes	4	M8 × 1.25 mm	00000000	000000
40	4	100	100	64	Steel	Steel	6,900	5,964	Yes	4	M8 × 1.25 mm	000000000	000000