Spline Sleeves | McMaster-Carr

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Length

Number of Splines

Material

Spline Length

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Spline Diameter

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Bearing Type

Dynamic Load Capacity

Less than 500 lb.

500 lb. to 999 lb.

1,000 lb. to 1,999 lb.

2,000 lb. to 2,999 lb.

3,000 lb. or greater

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72 Products

Mounted Linear Bearings for Ball Splines

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.

Steel Bearings


		For 4 Splines

												Groove, mm
For Spline Dia., mm	For No. of Splines	Overall Lg., mm	Flange OD, mm	Bolt Circle Dia., mm	OD, mm	Dynamic Load Cap., lb.	Static Load Cap., lb.	Max. Dynamic Torque, in·lbf	Max. Static Torque, in·lbf	Max. Temp., ° F	With Retaining Ring Grooves	Wd.	Dia.	No. of Mounting Holes		Each



	6	4	25	30	22	14	270	510	13	21	176	Yes	1.25	13.7	4	61145K41	0000000


	8	4	25	32	24	16	325	645	18	32	176	Yes	1.25	15.6	4	61145K42	000000
	10	4	33	42	32	21	610	1,100	38	72	176	Yes	1.65	20.5	4	61145K43	000000
	13	4	36	43	33	24	600	1,050	185	346	176	Yes	1.3	22.7	4	61145K111	00000
	16	4	50	50	40	31	1,350	2,500	531	973	176	Yes	1.6	29.4	4	61145K112	000000
	18.2	4	60	51	40	32	1,750	2,500	734	1,177	176	Yes	3	31.3	4	61145K46	000000
	20	4	63	58	45	35	2,000	3,650	929	1,717	176	Yes	2	33	4	61145K113	000000
	23	4	70	60	47	37	2,750	3,600	1,433	2,115	176	Yes	3.5	36.1	4	61145K47	000000
	25	4	71	65	52	42	2,850	5,250	1,672	3,062	176	Yes	2.5	39.5	4	61145K114	000000
	28	4	80	70	54	45	4,150	5,200	2,557	3,646	176	Yes	4	43.9	4	61145K48	000000
	30	4	80	75	60	47	4,150	5,200	2,716	3,885	176	Yes	3	44	4	61145K115	000000


	37.4	4	100	90	72	60	6,900	8,400	5,637	7,806	176	Yes	5	58.6	4	61145K49	000000
	40	4	100	100	82	64	6,900	8,400	5,964	8,266	176	Yes	4	60	4	61145K116	000000

52100 Alloy Steel Splines

Image of ProductInUse. Front orientation. Contains Annotated. Ball Splines and Bearings. Mounted Linear Bearings for Ball Splines, Splines.

Image of Product. Front orientation. ZoomedIn view. Contains MultipleImages. Ball Splines and Bearings. Mounted Linear Bearings for Ball Splines, Splines, Splined on Both Ends.

Splined on Both

Ends

Splined End ×

Step-Down End

4 Splines

Image of Attribute. Front orientation. ZoomedIn view. Contains Annotated. Mounted Linear Bearings for Ball Splines.

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.

Step-Down End—Splines with a step-down end have a shoulder near the end to stop gears, sprockets, and bearings.

		Spline				Step, mm
	Dia., mm	Lg., mm	No. of	Lg., mm	Root Dia., mm	Dia.	Lg.		Each
Splined on Both Ends



		6	150	4	150	5.3	—	—	61145K61	0000000


		6	200	4	200	5.3	—	—	61145K136	000000
		6	300	4	300	5.3	—	—	61145K137	000000
		8	150	4	150	7.2	—	—	61145K62	000000
		8	200	4	200	7.2	—	—	61145K139	000000
		10	200	4	200	9	—	—	61145K63	000000
		10	300	4	300	9	—	—	61145K144	000000
		10	600	4	600	9	—	—	61145K147	000000
		13	200	4	200	11.7	—	—	61145K148	00000
		13	500	4	500	11.7	—	—	61145K149	000000
		13	700	4	700	11.7	—	—	61145K151	000000


		16	200	4	200	14.2	—	—	61145K154	000000
		16	700	4	700	14.2	—	—	61145K156	000000
		20	200	4	200	17.9	—	—	61145K161	000000
		20	2,000	4	2,000	17.9	—	—	61145K165	00000000
		25	200	4	200	22.4	—	—	61145K166	000000
		25	500	4	500	22.4	—	—	61145K167	000000
		30	300	4	300	26.8	—	—	61145K172	000000
		30	1,000	4	1,000	26.8	—	—	61145K174	000000
		30	2,000	4	2,000	26.8	—	—	61145K176	00000000
		40	400	4	400	35.5	—	—	61145K177	000000


		40	700	4	700	35.5	—	—	61145K178	000000


		Splined End × Step-Down End



				18.2	200	4	350	16.4	15	150	61145K86	000000


				23	200	4	350	20.6	20	150	61145K87	000000
				28	300	4	450	24.8	25	150	61145K88	000000
				37.4	400	4	550	33.1	30	150	61145K89	000000

Sleeve Splines and Bearings

Often used in wet and dirty environments, these sleeve splines and bearings create a compact linear and rotary motion system. The grooves on the splines transmit rotary power as the sleeve bearing moves freely along their length. Sleeve bearings don't have moving parts that can be damaged from dirt and debris. And they don't need to be lubricated, making them overall lower maintenance than ball bearings.

Splines

Splines are PTFE coated to reduce friction, so bearings slide smoothly and last longer. They’re stainless steel, so they won’t rust.

	Spline
	Lg.	No. of	Lg.	Lg. Tolerance	Root Dia.	Material	Edge Type	Hardness Rating	Hardness		Each
1/4" Diameter (Tolerance: -0.002" to 0.002")



		12"	14	12"	0" to 0.25"	0.202"	PTFE-Coated 304 Stainless Steel	Straight	Medium	Rockwell B70	4134N11	000000


		24"	14	24"	0" to 0.25"	0.202"	PTFE-Coated 304 Stainless Steel	Straight	Medium	Rockwell B70	4134N12	000000
		36"	14	36"	0" to 0.25"	0.202"	PTFE-Coated 304 Stainless Steel	Straight	Medium	Rockwell B70	4134N13	000000


		3/8" Diameter (Tolerance: -0.002" to 0.002")



				12"	16	12"	0" to 0.25"	0.306"	PTFE-Coated 304 Stainless Steel	Straight	Medium	Rockwell B70	4134N14	00000


				24"	16	24"	0" to 0.25"	0.306"	PTFE-Coated 304 Stainless Steel	Straight	Medium	Rockwell B70	4134N15	000000
				36"	16	36"	0" to 0.25"	0.306"	PTFE-Coated 304 Stainless Steel	Straight	Medium	Rockwell B70	4134N16	000000


				1/2" Diameter (Tolerance: -0.002" to 0.002")



						12"	18	12"	0" to 0.25"	0.419"	PTFE-Coated 304 Stainless Steel	Straight	Medium	Rockwell B70	4134N17	00000


						24"	18	24"	0" to 0.25"	0.419"	PTFE-Coated 304 Stainless Steel	Straight	Medium	Rockwell B70	4134N18	000000
						36"	18	36"	0" to 0.25"	0.419"	PTFE-Coated 304 Stainless Steel	Straight	Medium	Rockwell B70	4134N19	000000

Rounded Bearings

Plastic Bearing—Bearings are plastic with a bronze shell, so they won't rust.

No. of Splines	OD	Overall Lg.	Dynamic Load Cap., lb.	Static Load Cap., lb.	Max. Dynamic Torque	Max. Static Torque	Bearing Material	Shell Material		Each



1/4"	14	1/2"	3/4"	5	5	Not Rated	Not Rated	Plastic	Bronze	4134N31	000000


3/8"	16	5/8"	1"	10	10	Not Rated	Not Rated	Plastic	Bronze	4134N32	00000
1/2"	18	13/16"	1 1/2"	15	15	Not Rated	Not Rated	Plastic	Bronze	4134N33	00000

Externally Threaded Bearings

Threaded bearings allow you to mount your load directly to the bearing.

Plastic Bearing—Bearings are plastic with a bronze shell, so they won't rust.

No. of Splines	OD	Overall Lg.	Thread Size	Dynamic Load Cap., lb.	Static Load Cap., lb.	Max. Dynamic Torque	Max. Static Torque	Bearing Material	Shell Material		Each



1/4"	14	1/2"	3/4"	7/16"-20	5	5	Not Rated	Not Rated	Plastic	Bronze	4134N34	000000


3/8"	16	5/8"	1"	9/16"-20	10	10	Not Rated	Not Rated	Plastic	Bronze	4134N35	00000
1/2"	18	13/16"	1 1/2"	3/4"-20	15	15	Not Rated	Not Rated	Plastic	Bronze	4134N36	00000

Flanges

Flanges work with threaded bearings to give you a surface with mounting holes to attach your load.

	Flange				Mounting Hole
Thread Size	Thk.	OD	Bolt Circle Dia.	Material	No. of	Dia.	Mounting Fasteners Included		Each
7/16"-20	1/4"	1 3/16"	7/8"	Anodized Aluminum	4	0.144"	No	4134N51	000000
9/16"-20	3/8"	1 7/16"	1 1/16"	Anodized Aluminum	4	0.177"	No	4134N52	00000
3/4"-20	1/2"	1 15/16"	1 3/8"	Anodized Aluminum	4	0.266"	No	4134N53	00000

Anti-Backlash Externally Threaded Bearings

Anti-backlash bearings minimize the space (play) between the bearing and spline for more accurate, repeatable positioning.

Threaded bearings allow you to mount your load directly to the bearing.

Plastic Bearing—Bearings are plastic with a bronze shell, so they won't rust.

No. of Splines	OD	Overall Lg.	Thread Size	Dynamic Load Cap., lb.	Static Load Cap., lb.	Max. Dynamic Torque	Max. Static Torque	Bearing Material	Shell Material		Each



1/4"	14	1/2"	3/4"	7/16"-20	5	5	Not Rated	Not Rated	Plastic	Bronze	4134N41	000000


3/8"	16	5/8"	1"	9/16"-20	10	10	Not Rated	Not Rated	Plastic	Bronze	4134N42	00000
1/2"	18	13/16"	1 1/2"	3/4"-20	15	15	Not Rated	Not Rated	Plastic	Bronze	4134N43	00000

Flanges

Flanges work with threaded bearings to give you a surface with mounting holes to attach your load.

	Flange				Mounting Hole
Thread Size	Thk.	OD	Bolt Circle Dia.	Material	No. of	Dia.	Mounting Fasteners Included		Each
7/16"-20	1/4"	1 3/16"	7/8"	Anodized Aluminum	4	0.144"	No	4134N51	000000
9/16"-20	3/8"	1 7/16"	1 1/16"	Anodized Aluminum	4	0.177"	No	4134N52	00000
3/4"-20	1/2"	1 15/16"	1 3/8"	Anodized Aluminum	4	0.266"	No	4134N53	00000

Linear Bearings for Ball Splines

Combine these bearings with a ball spline to create a compact linear and rotary motion system for applications with fast, complex movements, such as robotics. 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 into the groove on these bearings to position them in your system. Use the keyway and included machine key for attaching your load.

Steel Bearings


	For 4 Splines

										Groove, mm			Keyway, mm
For Spline Dia., mm	For No. of Splines	Overall Lg., mm	OD, mm	Dynamic Load Cap., lb.	Static Load Cap., lb.	Max. Dynamic Torque, in·lbf	Max. Static Torque, in·lbf	Max. Temp., ° F	With Retaining Ring Grooves	Wd.	Dia.	Includes	Lg.	Wd.	Dp.		Each



	6	4	25	14	270	510	13	21	176	Yes	1.3	13.3	Machine Key	10.5	2.5	1.2	61145K31	000000


	8	4	25	16	325	645	18	32	176	Yes	1.3	15.3	Machine Key	10.5	2.5	1.2	61145K32	00000
	10	4	33	21	610	1,100	38	72	176	Yes	1.7	20	Machine Key	13	3	1.5	61145K33	00000
	13	4	36	24	600	1,050	185	346	176	Yes	1.3	22.7	Machine Key	15	3	1.5	61145K12	00000
	16	4	50	31	1,350	2,500	531	973	176	Yes	1.6	29.4	Machine Key	17.5	3.5	2	61145K13	00000
	18.2	4	60	32	1,750	2,500	734	1,177	176	Yes	3.1	30.2	Machine Key	26	4	2.5	61145K36	000000
	25	4	71	42	2,850	5,250	1,672	3,062	176	Yes	2.5	39.5	Machine Key	36	4	2.5	61145K15	000000
	28	4	80	45	4,150	5,200	2,557	3,646	176	Yes	4.15	42.6	Machine Key	41	7	4	61145K38	000000
	30	4	80	47	4,150	5,200	2,716	3,885	176	Yes	3	44	Machine Key	42	4	2.5	61145K16	000000
	40	4	100	64	6,900	8,400	5,964	8,266	176	Yes	4	60	Machine Key	52	6	3.5	61145K17	000000

Stainless Steel Bearings


	For 4 Splines

Stainless steel bearings are more corrosion resistant than steel bearings.

										Groove, mm			Keyway, mm
For Spline Dia., mm	For No. of Splines	Overall Lg., mm	OD, mm	Dynamic Load Cap., lb.	Static Load Cap., lb.	Max. Dynamic Torque, in·lbf	Max. Static Torque, in·lbf	Max. Temp., ° F	With Retaining Ring Grooves	Wd.	Dia.	Includes	Lg.	Wd.	Dp.		Each



	6	4	25	14	270	510	13	21	176	Yes	0.6	13.4	Machine Key	10.5	2.5	1.2	61145K23	0000000


	13	4	36	24	600	1,050	185	346	176	Yes	1.3	22.7	Machine Key	15	3	1.5	61145K26	000000