Pillow Block Mounts | McMaster-Carr

Mount bearings quickly by using these precision housings, which don’t require any machining. They support a shaft that’s parallel to their mounting surface and let you replace the bearings as needed. Made of aluminum, they’re lightweight, durable, and have good corrosion resistance.

	For Bearing			Overall			Mounting
	OD	Wd.	Ctr. Ht.	Ht.	Lg.	Wd.	Hole Dia.	Hole Ctr.-to-Ctr.		Each
2014 Aluminum Housing



		5/16"	3/16"	3/8"	3/4"	1 7/16"	3/16"	1/8"	1 1/8"	3971N29	000000


		5/16"	3/8"	3/8"	3/4"	1 7/16"	3/8"	13/64"	1 1/8"	3971N14	00000
		3/8"	3/16"	3/8"	3/4"	1 7/16"	3/16"	1/8"	1 1/8"	3971N33	00000
		3/8"	3/8"	3/8"	3/4"	1 7/16"	3/8"	13/64"	1 1/8"	3971N17	00000
		3/8"	3/8"	9/16"	1 1/8"	2 1/4"	3/8"	9/32"	1 3/4"	3971N42	00000
		3/8"	7/16"	9/16"	1 1/8"	2 1/4"	7/16"	9/32"	1 3/4"	3971N61	00000
		3/8"	5/8"	9/16"	1 1/8"	2 1/4"	5/8"	9/32"	1 3/4"	3971N79	00000
		15/32"	3/8"	3/8"	3/4"	1 7/16"	3/8"	13/64"	1 1/8"	3971N21	00000
		15/32"	5/8"	9/16"	1 1/8"	2 1/4"	5/8"	9/32"	1 3/4"	3971N83	00000
		17/32"	3/8"	9/16"	1 1/8"	2 1/4"	3/8"	9/32"	1 3/4"	3971N47	00000
		17/32"	5/8"	9/16"	1 1/8"	2 1/4"	5/8"	9/32"	1 3/4"	3971N85	00000


		19/32"	7/16"	9/16"	1 1/8"	2 1/4"	7/16"	9/32"	1 3/4"	3971N69	00000
		25/32"	5/8"	9/16"	1 1/8"	2 1/4"	5/8"	9/32"	1 3/4"	3971N96	00000
		25/32"	5/8"	3/4"	1 9/16"	3 1/4"	5/8"	11/32"	2 1/2"	3971N108	00000
		7/8"	5/8"	3/4"	1 9/16"	3 1/4"	5/8"	11/32"	2 1/2"	3971N112	00000
		7/8"	5/8"	1"	1 15/16"	4"	5/8"	11/32"	3 1/8"	3971N187	00000
		7/8"	27/32"	3/4"	1 9/16"	3 1/4"	27/32"	11/32"	2 1/2"	3971N156	00000
		7/8"	57/64"	1"	1 15/16"	4"	57/64"	11/32"	3 1/8"	3971N168	00000
		1"	5/8"	3/4"	1 9/16"	3 1/4"	5/8"	11/32"	2 1/2"	3971N117	00000
		1"	5/8"	1"	1 15/16"	4"	5/8"	11/32"	3 1/8"	3971N193	00000
		1"	27/32"	1 1/4"	2 9/16"	5"	27/32"	9/16"	4"	3971N258	00000


		1"	15/16"	1 1/4"	2 9/16"	5"	15/16"	9/16"	4"	3971N249	00000
		1 1/8"	5/8"	1"	1 15/16"	4"	5/8"	11/32"	3 1/8"	3971N196	00000
		6 mm	10 mm	9.5 mm	19 mm	37 mm	10 mm	13/64"	29 mm	3971N12	00000
		8 mm	5 mm	9.5 mm	19 mm	37 mm	5 mm	1/8"	29 mm	3971N31	00000
		8 mm	10 mm	9.5 mm	19 mm	37 mm	10 mm	13/64"	29 mm	3971N15	00000
		10 mm	5 mm	9.5 mm	19 mm	37 mm	5 mm	1/8"	29 mm	3971N34	00000
		10 mm	10 mm	9.5 mm	19 mm	37 mm	10 mm	13/64"	29 mm	3971N18	00000
		16 mm	10 mm	14.3 mm	29 mm	57 mm	10 mm	9/32"	44 mm	3971N52	00000
		18 mm	16 mm	14.3 mm	29 mm	57 mm	16 mm	9/32"	44 mm	3971N93	00000
		19 mm	10 mm	14.3 mm	29 mm	57 mm	10 mm	9/32"	44 mm	3971N57	00000


		19 mm	20 mm	19 mm	40 mm	83 mm	20 mm	11/32"	64 mm	3971N129	00000
		22 mm	16 mm	19 mm	40 mm	83 mm	16 mm	11/32"	64 mm	3971N111	00000
		28 mm	16 mm	19 mm	40 mm	83 mm	16 mm	11/32"	64 mm	3971N119	00000
		32 mm	16 mm	25.4 mm	49 mm	102 mm	16 mm	11/32"	79 mm	3971N198	00000

Bearing Housings with Base Mount

Mate one of these housings with your own bearing to create a custom mounted bearing. If you don’t see an exact match, you can machine the housing to fit.

	For Bearing			Overall			Mounting
	OD	Wd.	Ctr. Ht.	Ht.	Lg.	Wd.	Hole Dia.	Hole Ctr.-to-Ctr.		Each
Aluminum Housing



		0.375"	3/8"	3/8"	3/4"	1 7/16"	3/8"	13/64"	1 1/8"	2829N1	000000


		0.5"	3/8"	9/16"	1 1/8"	2 1/4"	3/8"	9/32"	1 3/4"	2829N2	00000
		0.812"	5/8"	3/4"	1 9/16"	3 1/4"	5/8"	11/32"	2 1/2"	2829N3	00000
		1.25"	27/32"	1"	1 15/16"	4"	27/32"	11/32"	3 1/8"	2829N4	00000
		1.58"	7/8"	1 1/4"	2 9/16"	5"	7/8"	9/16"	4"	2829N5	00000

Linear Bearing Housings


For 1 Bearing	For 2 Bearings

Slide up to two linear ball or sleeve bearings into these housings and secure them with the included internal retaining rings.

For 2 Bearings—Housings for two bearings give you better running accuracy and alignment than using two separate pillow blocks.

			Overall				Mounting Holes
	For Bearing OD	For Max. Bearing Lg.	Lg.	Wd.	Ht.	Ctr. Ht.	No. of	Dia.		Each
6061 Aluminum







				For 1 Bearing

				1/2"	3/4"	1 3/16"	1 5/8"	13/16"	7/16"	4	5/32"	9804K1	000000


				5/8"	7/8"	1 5/16"	1 3/4"	15/16"	1/2"	4	5/32"	9804K2	00000
				7/8"	1 1/4"	1 11/16"	2"	1 1/4"	11/16"	4	5/32"	9804K3	00000
				1 1/8"	1 1/2"	1 15/16"	2 1/2"	1 5/8"	7/8"	4	3/16"	9804K4	00000
				1 1/4"	1 5/8"	2 1/16"	2 3/4"	1 3/4"	15/16"	4	3/16"	9804K5	00000
				1 9/16"	2 1/4"	2 13/16"	3 1/4"	2 3/16"	1 3/16"	4	7/32"	9804K67	00000
				2"	2 5/8"	3 5/8"	4"	2 13/16"	1 1/2"	4	7/32"	9804K68	00000
				2 3/8"	3"	4"	4 3/4"	3 1/4"	1 3/4"	4	9/32"	9804K69	000000




						For 2 Bearings

						7/8"	1 1/4"	3 1/2"	2"	1 1/4"	11/16"	4	5/32"	9804K61	00000


						1 1/8"	1 1/2"	4"	2 1/2"	1 5/8"	7/8"	4	3/16"	9804K62	00000
						1 1/4"	1 5/8"	4 1/2"	2 3/4"	1 3/4"	15/16"	4	3/16"	9804K63	00000
						1 9/16"	2 1/4"	6"	3 1/4"	2 3/16"	1 3/16"	4	7/32"	9804K64	000000

Precision Acme Lead Screws and Nuts

Pair with a motor in automated motion and positioning applications. A tight thread fit allows these lead screws and nuts to make accurate, repeatable starts and stops. Also known as single-start and self-locking lead screws and nuts, they have a single thread that runs the length of the screw. The nut travels only when the screw turns, so your system won’t unexpectedly move when the lead screw is at rest. To ensure compatibility, please select components that have the same thread direction, thread size, and number of thread starts.

Platform Nuts—Left-Hand Thread

Image of Product. Front orientation. Contains Annotated. Precision Lead Screws and Nuts. Precision Acme Lead Screws and Nuts, Platform Nuts—Left-Hand Thread.

Platform nuts have wide, machinable surfaces for custom mounting.

932 Bearing Bronze—932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

	Lg.	Wd.	Ht.	Ctr. Ht.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.		Each
932 Bearing Bronze



	1/2"-10	1 3/4"	2"	1 1/8"	5/8"	Acme	1:1	1	0.1"	Acme Class 2C	Brinell 65	Not Rated	1,200	1710K49	0000000


	3/4"-5	2 1/4"	2 5/8"	1 5/8"	15/16"	Acme	1:1	1	0.2"	Acme Class 2C	Brinell 65	Not Rated	2,800	1710K44	000000
	3/4"-6	2 1/4"	2 5/8"	1 5/8"	15/16"	Acme	1:1	1	0.167"	Acme Class 2C	Brinell 65	Not Rated	2,800	1710K47	000000
	3/4"-10	2 1/4"	2 5/8"	1 5/8"	15/16"	Acme	1:1	1	0.1"	Acme Class 2C	Brinell 65	Not Rated	2,800	1710K51	000000
	1"-4	3"	3"	1 15/16"	1 1/8"	Acme	1:1	1	0.25"	Acme Class 2C	Brinell 65	Not Rated	5,000	1710K41	000000
	1"-5	3"	3"	1 15/16"	1 1/8"	Acme	1:1	1	0.2"	Acme Class 2C	Brinell 65	Not Rated	5,000	1710K45	000000
	1"-6	3"	3"	1 15/16"	1 1/8"	Acme	1:1	1	0.167"	Acme Class 2C	Brinell 65	Not Rated	5,000	1710K48	000000
	1"-10	3"	3"	1 15/16"	1 1/8"	Acme	1:1	1	0.1"	Acme Class 2C	Brinell 65	Not Rated	5,000	1710K52	000000
	1 1/2"-4	4 1/2"	3 5/8"	2 9/16"	1 1/2"	Acme	1:1	1	0.25"	Acme Class 2C	Brinell 65	Not Rated	11,000	1710K43	000000

Platform Nuts—Right-Hand Thread

Image of Product. Front orientation. Contains Annotated. Precision Lead Screws and Nuts. Precision Acme Lead Screws and Nuts, Platform Nuts—Right-Hand Thread.

Platform nuts have wide, machinable surfaces for custom mounting.

932 Bearing Bronze—932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

	Lg.	Wd.	Ht.	Ctr. Ht.	Thread Type	Speed Ratio	No. of Thread Starts	Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength	Dynamic Thrust Load Cap., lb.		Each
932 Bearing Bronze



	1/2"-10	1 3/4"	2"	1 1/8"	5/8"	Acme	1:1	1	0.1"	Acme Class 2C	Brinell 65	Not Rated	1,200	1710K9	0000000


	3/4"-5	2 1/4"	2 5/8"	1 5/8"	15/16"	Acme	1:1	1	0.2"	Acme Class 2C	Brinell 65	Not Rated	2,800	1710K4	000000
	3/4"-6	2 1/4"	2 5/8"	1 5/8"	15/16"	Acme	1:1	1	0.167"	Acme Class 2C	Brinell 65	Not Rated	2,800	1710K7	000000
	3/4"-10	2 1/4"	2 5/8"	1 5/8"	15/16"	Acme	1:1	1	0.1"	Acme Class 2C	Brinell 65	Not Rated	2,800	1710K11	000000
	1"-4	3"	3"	1 15/16"	1 1/8"	Acme	1:1	1	0.25"	Acme Class 2C	Brinell 65	Not Rated	5,000	1710K1	000000
	1"-5	3"	3"	1 15/16"	1 1/8"	Acme	1:1	1	0.2"	Acme Class 2C	Brinell 65	Not Rated	5,000	1710K5	000000
	1"-6	3"	3"	1 15/16"	1 1/8"	Acme	1:1	1	0.167"	Acme Class 2C	Brinell 65	Not Rated	5,000	1710K8	000000
	1"-10	3"	3"	1 15/16"	1 1/8"	Acme	1:1	1	0.1"	Acme Class 2C	Brinell 65	Not Rated	5,000	1710K12	000000
	1 1/2"-4	4 1/2"	3 5/8"	2 9/16"	1 1/2"	Acme	1:1	1	0.25"	Acme Class 2C	Brinell 65	Not Rated	11,000	1710K3	000000

Ball Screws and Nuts

Internal ball bearings provide smooth low-friction travel in applications that require high speeds, accurate positioning, and repeatable movement. Also known as single-start ball screws and nuts, they have a single thread that runs the length of the screw. They operate with more torque than fast-travel ball screws and nuts. To ensure compatibility, select components that have the same thread direction and size. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.

Platform Ball Nuts—Right-Hand Threaded

Image of Product. Front orientation. Contains Annotated. Ball Screws and Nuts. Ball Screws and Nuts , Platform Nut, Ball Nuts.

Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.

	Lg., mm	Wd., mm	Ht., mm	Ctr. Ht., mm	No. of Thread Starts	Travel Distance per Turn, mm	Hardness	Dynamic Thrust Load Cap., lb.	Max. Backlash, mm	Temp. Range, ° F		Each
Alloy Steel



	M14	35	34	30	13	1	4	Rockwell C58	1,200	0.1	5 to 175	6624K73	0000000


	M16	36	42	32.5	16	1	5	Rockwell C58	1,200	0.1	5 to 175	6624K27	000000
	M20	35	48	39	17	1	5	Rockwell C58	1,300	0.1	5 to 175	6624K29	000000
	M20	58	48	46	18	1	10	Rockwell C58	2,350	0.1	5 to 175	6624K31	000000
	M25	35	60	45	20	1	5	Rockwell C58	1,500	0.1	5 to 175	6624K33	000000
	M25	94	60	55	23	1	10	Rockwell C58	7,000	0.1	5 to 175	6624K35	000000