Pulleys for Flat Belts | McMaster-Carr

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176 Products

Flat Belt Idler Pulleys

Nylon

Cast Iron

Steel

Image of Attribute. Front orientation. Contains Annotated.

These pulleys spin freely on built-in bearings to maintain tension for reduced wear and vibration. They’re often used with belt tensioners (sold separately).

Ball Bearing—Pulleys with ball bearings ensure proper positioning inside a tube or housing. They’re sealed to block out dust and contaminants better than pulleys with needle roller bearings.

Needle Roller Bearing—Pulleys with needle roller bearings minimize internal friction.

Nylon—Nylon pulleys are lightweight and corrosion resistant.

Cast Iron and Steel—Cast iron and steel pulleys are more durable than nylon pulleys.

	OD	For Shaft Dia.	Dia.	Wd.	Groove Dp.	Material		Each
Ball Bearing



	5/8"	3.5"	3/8"	3"	1 3/32"	0.25"	Nylon	6235K64	000000


	5/8"	3.5"	1/2"	3"	1 3/32"	0.25"	Nylon	6235K74	00000
	11/16"	2.5"	0.635"	2 1/4"	7/8"	0.125"	Cast Iron	1355K13	00000
	13/16"	2.8"	3/8"	2 33/64"	1 7/32"	0.11"	Nylon	6235K68	00000
	13/16"	2.8"	1/2"	2 33/64"	1 7/32"	0.11"	Nylon	6235K78	00000
	13/16"	3.5"	3/8"	3"	1 7/32"	0.25"	Nylon	6235K65	00000
	13/16"	3.5"	1/2"	3"	1 7/32"	0.25"	Nylon	6235K75	00000
	7/8"	2.4"	3/8"	2"	1 5/32"	0.18"	Nylon	6235K61	00000
	7/8"	2.4"	1/2"	2"	1 5/32"	0.18"	Nylon	6235K71	00000
	7/8"	3"	3/8"	2 1/2"	1 5/16"	0.25"	Nylon	6235K63	00000
	7/8"	3"	1/2"	2 1/2"	1 5/16"	0.25"	Nylon	6235K73	00000


	7/8"	5.6"	3/8"	5 1/32"	1 19/64"	0.26"	Nylon	6235K67	00000
	7/8"	5.6"	1/2"	5 1/32"	1 19/64"	0.26"	Nylon	6235K77	00000
	29/32"	4.5"	3/8"	4"	1 25/64"	0.25"	Nylon	6235K66	00000
	29/32"	4.5"	1/2"	4"	1 25/64"	0.25"	Nylon	6235K76	00000
	1 1/16"	4.5"	0.635"	4"	1 7/16"	0.25"	Cast Iron	1355K14	000000
	1 1/8"	2.1"	3/8"	1 7/8"	1 35/64"	0.09"	Nylon	6235K62	00000
	1 1/8"	2.1"	1/2"	1 7/8"	1 35/64"	0.09"	Nylon	6235K72	00000
	1 1/8"	3.4"	3/8"	2 31/32"	1 43/64"	0.2"	Nylon	6235K69	00000
	1 1/8"	3.4"	1/2"	2 31/32"	1 43/64"	0.2"	Nylon	6235K79	00000
	2 1/16"	4.5"	0.635"	4"	2 7/16"	0.25"	Cast Iron	1355K15	000000


	3 1/16"	4.5"	0.635"	4"	3 7/16"	0.25"	Cast Iron	1355K16	000000
	4 1/2"	7"	1"	6"	5"	0.5"	Cast Iron	1355K17	000000
	6 1/4"	7"	1"	6"	6 3/4"	0.5"	Cast Iron	1355K18	000000


	Needle Roller Bearing



			7/16"	1.4"	1/2"	1 1/8"	5/8"	0.125"	Steel	1355K1	00000


			9/16"	1.8"	1/2"	1 3/8"	13/16"	0.187"	Steel	1355K2	00000
			11/16"	2.5"	1"	2 1/4"	7/8"	0.125"	Steel	1355K3	00000
			1 1/16"	4.5"	1"	4"	1 7/16"	0.25"	Cast Iron	1355K4	000000
			2 1/16"	4.5"	1"	4"	2 7/16"	0.25"	Cast Iron	1355K5	000000
			3 1/16"	4.5"	1"	4"	3 7/16"	0.25"	Cast Iron	1355K6	000000
			4 1/2"	7"	1 1/2"	6"	5"	0.5"	Cast Iron	1355K11	000000

Flat Belt Drive Pulleys

Also known as paper-plant pulleys, these are made of a composite that minimizes belt slippage and wear.

					Keyway
For Belt Wd.	OD	For Shaft Dia.	Dia.	Wd.	Wd.	Dp.	Material	Includes		Each
1"	2"	1/2"	2"	1 1/2"	1/8"	1/16"	Laminate	One Set Screw	6231K111	000000
1"	2"	5/8"	2"	1 1/2"	3/16"	3/32"	Laminate	One Set Screw	6231K112	00000
1"	2"	3/4"	2"	1 1/2"	3/16"	3/32"	Laminate	One Set Screw	6231K113	00000
1 1/2"	2"	1/2"	2"	2"	1/8"	1/16"	Laminate	One Set Screw	6231K121	00000
1 1/2"	2"	5/8"	2"	2"	3/16"	3/32"	Laminate	One Set Screw	6231K122	00000
1 1/2"	2"	3/4"	2"	2"	3/16"	3/32"	Laminate	One Set Screw	6231K123	00000
2 1/2"	2"	1/2"	2"	3"	1/8"	1/16"	Laminate	Two Set Screws	6231K131	00000
2 1/2"	2"	5/8"	2"	3"	3/16"	3/32"	Laminate	Two Set Screws	6231K132	00000
2 1/2"	2"	3/4"	2"	3"	3/16"	3/32"	Laminate	Two Set Screws	6231K133	00000
3"	2.5"	3/4"	2.5"	3 1/2"	3/16"	3/32"	Laminate	Two Set Screws	6231K151	000000
3"	2.5"	7/8"	2.5"	3 1/2"	3/16"	3/32"	Laminate	Two Set Screws	6231K152	000000
3"	2.5"	1"	2.5"	3 1/2"	1/4"	1/8"	Laminate	Two Set Screws	6231K153	000000
3"	3"	3/4"	3"	3 1/2"	3/16"	3/32"	Laminate	Two Set Screws	6231K201	000000
3"	3"	7/8"	3"	3 1/2"	3/16"	3/32"	Laminate	Two Set Screws	6231K202	000000
3"	3"	1"	3"	3 1/2"	1/4"	1/8"	Laminate	Two Set Screws	6231K203	000000
3"	3.5"	3/4"	3.5"	3 1/2"	3/16"	3/32"	Laminate	Two Set Screws	6231K221	000000
3"	3.5"	7/8"	3.5"	3 1/2"	3/16"	3/32"	Laminate	Two Set Screws	6231K222	000000
3"	3.5"	1"	3.5"	3 1/2"	1/4"	1/8"	Laminate	Two Set Screws	6231K223	000000
3"	3.5"	1 1/4"	3.5"	3 1/2"	1/4"	1/8"	Laminate	Two Set Screws	6231K224	000000
3"	3.5"	1 1/2"	3.5"	3 1/2"	3/8"	3/16"	Laminate	Two Set Screws	6231K225	000000
4"	4"	3/4"	4"	4 1/2"	3/16"	3/32"	Laminate	Two Set Screws	6231K281	000000
4"	4"	7/8"	4"	4 1/2"	3/16"	3/32"	Laminate	Two Set Screws	6231K282	000000
4"	4"	1"	4"	4 1/2"	1/4"	1/8"	Laminate	Two Set Screws	6231K283	000000
4"	4"	1 1/4"	4"	4 1/2"	1/4"	1/8"	Laminate	Two Set Screws	6231K284	000000
4"	4"	1 1/2"	4"	4 1/2"	3/8"	3/16"	Laminate	Two Set Screws	6231K285	000000

Abrasion-Resistant Made-to-Order Flat Belts


	Outer Circumference

Made of polyurethane, these belts are chemical and abrasion resistant.

To Order: Please specify outer circumference in _1/4"increments.

Wd.	Thk.	Outer Circumference Range	For Min. Pulley Dia.	Material	Color		Per Inch
3/8"	0.055"	12" to 1,200"	3/8"	Polyurethane Rubber	Orange	9485T11	00000
1/2"	0.062"	12" to 1,200"	1/2"	Polyurethane Rubber	Orange	9485T12	0000
5/8"	0.125"	12" to 1,200"	1"	Polyurethane Rubber	Orange	9485T13	0000
3/4"	0.078"	12" to 1,200"	5/8"	Polyurethane Rubber	Orange	9485T14	0000
1"	0.09"	12" to 1,200"	3/4"	Polyurethane Rubber	Orange	9485T15	0000
1 1/4"	0.09"	12" to 1,200"	3/4"	Polyurethane Rubber	Orange	9485T16	0000
1 1/2"	0.09"	12" to 1,200"	3/4"	Polyurethane Rubber	Orange	9485T17	0000
1 3/4"	0.062"	12" to 1,200"	1/2"	Polyurethane Rubber	Orange	9485T18	0000
2"	0.062"	12" to 1,200"	1/2"	Polyurethane Rubber	Orange	9485T19	0000
3"	0.062"	12" to 1,200"	7/8"	Polyurethane Rubber	Orange	9485T51	0000

Made-to-Order Flat Belts

Outer

Circumference

These oil-resistant Buna-N belts have a nylon core.

7" to 60" Outer Circumference Range

	For Min. Pulley Dia.	Material	Core Material	Color		Per Inch
0.03" Thick



	3/16"	19/32"	Buna-N	Nylon	Black, Green	6082K52	00000


	1/4"	19/32"	Buna-N	Nylon	Black, Green	6082K51	0000
	1/2"	19/32"	Buna-N	Nylon	Black, Green	6082K33	0000
	3/4"	19/32"	Buna-N	Nylon	Black, Green	6082K35	0000
	1"	19/32"	Buna-N	Nylon	Black, Green	6082K12	0000
	2 1/2"	19/32"	Buna-N	Nylon	Black, Green	6082K18	0000

61" to 4,140" Outer Circumference Range

To Order: Please specify outer circumference in _1/4" increments.

	For Min. Pulley Dia.	Material	Core Material	Color		Per Inch
0.03" Thick



	3/16"	19/32"	Buna-N	Nylon	Black, Green	6082K61	00000


	1/4"	19/32"	Buna-N	Nylon	Black, Green	6082K62	0000
	1/2"	19/32"	Buna-N	Nylon	Black, Green	6082K64	0000
	3/4"	19/32"	Buna-N	Nylon	Black, Green	6082K65	0000
	1"	19/32"	Buna-N	Nylon	Black, Green	6082K66	0000
	2 1/2"	19/32"	Buna-N	Nylon	Black, Green	6082K71	0000

Heavy Duty Long-Life Leather Flat Belting

Also known as center-stock belting, this belting resists permanent stretch and has excellent resistance to oil, which gives it a long service life. To join ends, use alligator belt lacing.

	For Min. Pulley Dia.	Material	Color		Per Ft.
1 Ply—0.1563" Thick



	1/2"	3"	Leather	Brown	6076K51	00000


	3/4"	3"	Leather	Brown	6076K52	00000
	1"	3"	Leather	Brown	6076K41	00000
	1 1/4"	3"	Leather	Brown	6076K42	00000
	1 1/2"	3"	Leather	Brown	6076K43	00000
	2"	3"	Leather	Brown	6076K56	00000
	2 1/2"	3"	Leather	Brown	6076K57	00000
	3"	3"	Leather	Brown	6076K58	00000
	4"	3"	Leather	Brown	6076K59	00000


	1 Ply—0.1875" Thick



			1/2"	5"	Leather	Brown	6076K11	0000


			3/4"	5"	Leather	Brown	6076K12	00000
			1"	5"	Leather	Brown	6076K13	00000
			1 1/4"	5"	Leather	Brown	6076K14	00000
			1 1/2"	5"	Leather	Brown	6076K15	00000
			2"	5"	Leather	Brown	6076K16	00000
			2 1/2"	5"	Leather	Brown	6076K17	00000
			3"	5"	Leather	Brown	6076K18	00000
			4"	5"	Leather	Brown	6076K19	00000
			6"	5"	Leather	Brown	6076K22	00000


			2 Ply—0.2188" Thick



					1/2"	5"	Leather	Brown	6081K38	00000


					3/4"	5"	Leather	Brown	6081K39	00000
					1"	5"	Leather	Brown	6081K11	00000
					1 1/4"	5"	Leather	Brown	6081K12	00000
					1 1/2"	5"	Leather	Brown	6081K13	00000
					2"	5"	Leather	Brown	6081K14	00000
					2 1/2"	5"	Leather	Brown	6081K15	00000
					3"	5"	Leather	Brown	6081K16	00000
					4"	5"	Leather	Brown	6081K17	00000


					2 Ply—0.2656" Thick



							3/4"	6"	Leather	Brown	6080K38	00000


							1"	6"	Leather	Brown	6080K11	00000
							1 1/4"	6"	Leather	Brown	6080K12	00000
							1 1/2"	6"	Leather	Brown	6080K13	00000
							2"	6"	Leather	Brown	6080K14	00000
							2 1/2"	6"	Leather	Brown	6080K16	00000
							3"	6"	Leather	Brown	6080K17	00000
4"							6"	Leather	Brown	6080K19	00000


2 Ply—0.3438" Thick



							1"	12"	Leather	Brown	6081K26	00000


							1 1/4"	12"	Leather	Brown	6081K27	00000
							1 1/2"	12"	Leather	Brown	6081K28	00000
							2"	12"	Leather	Brown	6081K29	00000
							2 1/2"	12"	Leather	Brown	6081K31	00000
							3"	12"	Leather	Brown	6081K32	00000
							4"	12"	Leather	Brown	6081K33	00000

Flat Belting

Weld the ends of this belting together for a firm hold. Resistant to chemicals and abrasion, it is often used for light to medium duty power transmission. To weld ends, use a welding kit.

	For Min. Pulley Dia.	Material	Color		Per Ft.
0.055" Thick



	3/8"	3/8"	Polyurethane Rubber	Orange	6075K11	00000


	0.062" Thick



			1/2"	1/2"	Polyurethane Rubber	Orange	6075K12	0000


			3/4"	1/2"	Polyurethane Rubber	Orange	6075K24	0000
			1 3/4"	1/2"	Polyurethane Rubber	Orange	6075K18	0000
			2"	1/2"	Polyurethane Rubber	Orange	6075K19	0000
			3"	1/2"	Polyurethane Rubber	Orange	6075K23	0000


			0.078" Thick



					3/4"	5/8"	Polyurethane Rubber	Orange	6075K14	0000


					0.09" Thick



							1"	3/4"	Polyurethane Rubber	Orange	6075K15	0000


							1 1/4"	3/4"	Polyurethane Rubber	Orange	6075K16	0000
							1 1/2"	3/4"	Polyurethane Rubber	Orange	6075K17	0000
							2"	3/4"	Polyurethane Rubber	Orange	6075K27	00000


							0.125" Thick



									5/8"	1"	Polyurethane Rubber	Orange	6075K13	0000


									1"	1"	Polyurethane Rubber	Orange	6075K25	0000


									0.25" Thick



											5/8"	2"	Polyurethane Rubber	Orange	6075K26	00000

Strong-Grip Flat Belting


3 Ply	4 Ply	5 Ply

Commonly used for material handling and light to medium duty power transmission, this belting has a textured rubber cover on both sides for gripping material. To join ends, use alligator belt lacing.

					3 Ply—0.141" Thick			4 Ply—0.187" Thick			5 Ply—0.213" Thick
Wd.	Wd. Tolerance	Material	Core Material	Color	For Min. Pulley Dia.		Per Ft.	For Min. Pulley Dia.		Per Ft.	For Min. Pulley Dia.		Per Ft.
1 1/4"	-0.125" to 0.125"	SBR	Cotton	Brown	2 1/2"	5753K425	00000	3"	5753K446	00000	3 1/2"	5753K465	00000
1 1/2"	-0.125" to 0.125"	SBR	Cotton	Brown	2 1/2"	5753K424	0000	3"	5753K445	0000	3 1/2"	5753K464	0000
2"	-0.125" to 0.125"	SBR	Cotton	Brown	2 1/2"	5753K411	0000	3"	5753K431	0000	3 1/2"	5753K451	0000
2 1/2"	-0.125" to 0.125"	SBR	Cotton	Brown	2 1/2"	5753K426	0000	3"	5753K447	0000	3 1/2"	5753K466	0000
3"	-0.125" to 0.125"	SBR	Cotton	Brown	2 1/2"	5753K472	0000	3"	5753K432	0000	3 1/2"	5753K452	0000
4"	-0.125" to 0.125"	SBR	Cotton	Brown	2 1/2"	5753K413	0000	3"	5753K433	0000	3 1/2"	5753K453	00000
6"	-0.125" to 0.125"	SBR	Cotton	Brown	2 1/2"	5753K414	00000	3"	5753K434	00000	3 1/2"	5753K454	00000

High-Speed Long-Life Leather Flat Belting

A nylon core allows this belting to handle higher speeds than other leather flat belting. It resists permanent stretch and has excellent resistance to oil, which gives it a long service life. To join ends, use alligator belt lacing.

	For Min. Pulley Dia.	Material	Core Material	Color		Per Ft.
3 Ply—0.17" Thick



	1/2"	3 5/16"	Leather	Nylon	Gray	6355K31	00000


	3/4"	3 5/16"	Leather	Nylon	Gray	6355K32	0000
	1"	3 5/16"	Leather	Nylon	Gray	6355K33	0000
	1 1/4"	3 5/16"	Leather	Nylon	Gray	6355K34	00000
	1 1/2"	3 5/16"	Leather	Nylon	Gray	6355K35	00000
	2"	3 5/16"	Leather	Nylon	Gray	6355K36	00000
	2 1/2"	3 5/16"	Leather	Nylon	Gray	6355K37	00000
	3"	3 5/16"	Leather	Nylon	Gray	6355K38	00000
	3 1/2"	3 5/16"	Leather	Nylon	Gray	6355K39	00000
	4"	3 5/16"	Leather	Nylon	Gray	6355K41	00000

Light Duty Long-Life Leather Flat Belting

1 Ply

Also known as side-stock belting, this belting resists permanent stretch and has excellent resistance to oil, which gives it a long service life. To join ends, use alligator belt lacing.

	For Min. Pulley Dia.	Material	Color		Per Ft.
1 Ply—0.1563" Thick



	1"	3"	Leather	Brown	6078K11	000000


	1 1/4"	3"	Leather	Brown	6078K12	00000
	1 1/2"	3"	Leather	Brown	6078K13	00000
	2"	3"	Leather	Brown	6078K14	00000
	2 1/4"	3"	Leather	Brown	6078K15	00000
	2 1/2"	3"	Leather	Brown	6078K16	00000
	2 3/4"	3"	Leather	Brown	6078K17	00000
	3"	3"	Leather	Brown	6078K18	00000
	4"	3"	Leather	Brown	6078K19	00000
	6"	3"	Leather	Brown	6078K22	00000