Pulleys

V-belt pulleys are built to ensure dependable power transmission across a wide variety of machinery.

Manufactured from high-quality, durable materials such as GG25 grade cast iron, they offer outstanding resistance to wear, distortion, and deformation, delivering reliable, long-term performance even in demanding operating environments.

Enquire Now

Got a project that demands precision?

Our engineers design, manufacture, and supply components to your exact specification. Contact us to discuss your project.

Get In Touch

Product Overview

V-belt pulleys are built to ensure dependable power transmission across a wide variety of machinery.

Standard V-Belt pulleys can be used with both “classical” belts and “wedge” belts to transmit power and torque between various industrial appliances.

NBC stocks a wide range of cast iron (EN-GJL-250 UNI EN 1561) V-belt pulleys, including some very large sizes not normally readily available. A smaller range of steel (C45) pulleys are also stocked.

There are two standard V-Belt pulley types

Pilot Bore

These have small pilot holes that can be machined (usually bored and keyed). NBC can supply pulleys machined to the customer’s requirements.

Taper Bore

Most common type uses taper bushes to easily fix them to a shaft. Most economical, as the combined cost of a taper-bored pulley and taper bush is usually cheaper than a pilot bore pulley that requires a machined bore and keyway.

The standard V-Pulley range is available in the following sections:

SPZ (also suitable for Classical Z) – Pilot bore or Taper bore with up to 8 grooves

SPA (also suitable for Classical A) – Pilot bore or Taper bore with up to 6 grooves

SPB (also suitable for Classical B) – Pilot bore or Taper bore with up to 10 grooves

SPC (also suitable for Classical C) – Pilot bore or Taper bore with up to 12 groove

What are the Typical Uses for V-Belt pulleys?

Automotive industry
Conveyors
Lathes
Agricultural Equipment

Dimensions

Pulley Groove Dimensions

	a	b	c	d	e	f	h	34°	38°
SPZ	9.7	8.5	8	12	8	2	11	P <= 80	P > 80
SPA	12.7	11	10	15	10	2.8	13.8	P <= 118	P > 118
SPB	16.3	14	12.5	19	12.5	3.5	17.5	P <= 190	P > 190
SPC	22	19	17	25.5	17	4.8	23.8	P <= 315	P > 315

V Belt dimensions

	m	s	n
SPZ	9.7	8	8.5
SPA	12.7	10	11
SPB	16.3	13	14
SPC	22	18	19

SPZ-1 Pulley Dimensions

PTP part #	#Grooves	P	O	Fig	Bush	Max Ø	E	F	J	K	L	M	N
		mm	mm			mm	mm	mm	mm	mm	mm	mm	mm
SPZ 50 – 1	1	50	54	9	1008	25	–	37	26	12	25	–	–
SPZ 56 – 1		56	60	9	1008		–	37	32	12	25	–	–
SPZ 60 – 1		60	64	1	1008		–	22	–	–	22	–	–
SPZ 63 – 1		63	67	1	1108	28	–	16	–	–	22	6	56
SPZ 67 – 1		67	71	1	1108		–	16	–	–	22	6	60
SPZ 71 – 1		71	75	1	1108		–	16	–	–	22	6	60
SPZ 75 – 1		75	79	1	1108		–	16	–	–	22	6	60
SPZ 80 – 1		80	84	1	1210	32	–	16	–	–	25	9	75
SPZ 85 – 1		85	89	1	1210		–	16	–	–	25	9	80
SPZ 90 – 1		90	94	1	1210		–	16	–	–	25	9	80
SPZ 95 – 1		95	99	1	1210		–	16	–	–	25	9	85
SPZ 100 – 1		100	104	1	1210		–	16	–	–	25	9	85
SPZ 106 – 1		106	110	1	1610	42	–	16	–	–	25	9	92
SPZ 112 – 1		112	116	1	1610		–	16	–	–	25	9	92
SPZ 118 – 1		118	122	1	1610		–	16	–	–	25	9	92
SPZ 125 – 1		125	129	1	1610		–	16	–	–	25	9	92
SPZ 132 – 1		132	136	1	1610		–	16	–	–	25	9	92
SPZ 140 – 1		140	144	1	1610		–	16	–	–	25	9	92
SPZ 150 – 1		150	154	1	1610		–	16	–	–	25	9	92
SPZ 160 – 1		160	164	1	1610		–	16	–	–	25	9	92
SPZ 170 – 1		170	174	1	1610		–	16	–	–	25	9	92
SPZ 180 – 1		180	184	7	1610		6	16	152	–	25	9	92
SPZ 190 – 1		190	194	7	1610		12	16	162	–	25	9	92
SPZ 200 – 1		200	204	7	2012	50	10	16	171	–	32	16	112
SPZ 224 – 1		224	228	7	2012		15	16	195	–	32	16	112
SPZ 250 – 1		250	254	4	2012		–	16	221	8	32	8	112
SPZ 280 – 1		280	284	4	2012		–	16	251	8	32	8	112
SPZ 315 – 1		315	319	4	2012		–	16	286	8	32	8	112
SPZ 355 – 1		355	359	4	2012		–	16	326	8	32	8	112
SPZ 400 – 1		400	404	4	2012		–	16	371	8	32	8	112
SPZ 450 – 1		450	454	4	2517	60	–	16	421	14.5	45	14.5	124

SPZ-2 Pulley Dimensions

PTP part #	#Grooves	P	O	Fig	Bush	Max f	E	F	J	K	L	M	N
		mm	mm			mm	mm	mm	mm	mm	mm	mm	mm
SPZ 50 – 2	2	50	54	9	1008	25	–	50	26	25	25	–	–
SPZ 56 – 2		56	60	9	1008	25	–	49	32	27	22	–	–
SPZ 60 – 2		60	64	9	1108	28	–	49	36	27	22	–	–
SPZ 63 – 2		63	67	8	1108		–	28	40	6	22	–	–
SPZ 67 – 2		67	71	8	1108		–	28	42	6	22	–	–
SPZ 71 – 2		71	75	8	1108		–	28	42	6	22	–	–
SPZ 75 – 2		75	79	8	1210	32	–	28	51	3	25	–	–
SPZ 80 – 2		80	84	8	1210	32	–	28	51	3	25	–	–
SPZ 85 – 2		85	89	8	1610	42	–	28	60	3	25	–	–
SPZ 90 – 2		90	94	8	1610		–	28	61	3	25	–	–
SPZ 95 – 2		95	99	8	1610		–	28	66	3	25	–	–
SPZ 100 – 2		100	104	8	1610		–	28	71	3	25	–	–
SPZ 106 – 2		106	110	8	1610		–	28	76	3	25	–	–
SPZ 112 – 2		112	116	8	1610		–	28	83	3	25	–	–
SPZ 118 – 2		118	122	8	1610		–	28	90	3	25	–	–
SPZ 125 – 2		125	129	8	1610		–	28	96	3	25	–	–
SPZ 132 – 2		132	136	8	1610		–	28	103	3	25	–	–
SPZ 140 – 2		140	144	8	1610		–	28	111	3	25	–	–
SPZ 150 – 2		150	154	1	2012	50	–	28	–	–	32	4	112
SPZ 160 – 2		160	164	1	2012		–	28	–	–	32	4	112
SPZ 170 – 2		170	174	1	2012		–	28	–	–	32	4	112
SPZ 180 – 2		180	184	7	2012		6	28	152	–	32	4	112
SPZ 190 – 2		190	194	7	2012		12	28	162	–	32	4	112
SPZ 200 – 2		200	204	7	2012		6	28	171	–	32	4	112
SPZ 224 – 2		224	228	7	2012		15	28	195	–	32	4	112
SPZ 250 – 2		250	254	4	2012		–	28	221	2	32	2	112
SPZ 280 – 2		280	284	4	2012		–	28	251	2	32	2	112
SPZ 315 – 2		315	319	4	2012		–	28	286	2	32	2	112
SPZ 355 – 2		355	359	4	2012		–	28	326	2	32	2	112
SPZ 400 – 2		400	404	4	2517	60	–	28	371	8.5	45	8.5	124
SPZ 450 – 2		450	454	4	2517	60	–	28	421	8.5	45	8.5	124

SPZ-3 Pulley Dimensions

PTP part #	#Grooves	P	O	Fig	Bush	Max f	E	F	J	K	L	M	N
		mm	mm			mm	mm	mm	mm	mm	mm	mm	mm
SPZ 63 – 3	3	63	67	8	1108	28	–	40	40	–	22	–	–
SPZ 67 – 3		67	71	8	1108		–	40	42	18	22	–	–
SPZ 71 – 3		71	75	8	1108		–	40	42	18	22	–	–
SPZ 75 – 3		75	79	8	1210	32	–	40	51	15	25	–	–
SPZ 80 – 3		80	84	8	1210	32	–	40	51	15	25	–	–
SPZ 85 – 3		85	89	8	1610	42	–	40	60	15	25	–	–
SPZ 90 – 3		90	94	8	1610		–	40	61	15	25	–	–
SPZ 95 – 3		95	99	8	1610		–	40	66	15	25	–	–
SPZ 100 – 3		100	104	8	1610		–	40	71	15	25	–	–
SPZ 106 – 3		106	110	8	1610		–	40	76	15	25	–	–
SPZ 112 – 3		112	116	8	2012	50	–	40	83	8	32	–	–
SPZ 118 – 3		118	122	8	1610		–	40	90	8	32	–	–
SPZ 125 – 3		125	129	2	1610		–	40	96	–	32	8	–
SPZ 132 – 3		132	136	2	1610		–	40	103	–	32	8	–
SPZ 140 – 3		140	144	2	1610		–	40	111	–	32	8	–
SPZ 150 – 3		150	154	2	2012		–	40	121	–	32	8	–
SPZ 160 – 3		160	164	2	2012		–	40	131	–	32	8	–
SPZ 170 – 3		170	174	3	2012		–	40	141	4	32	4	–
SPZ 180 – 3		180	184	6	2012		7	40	151	–	32	8	106
SPZ 190 – 3		190	194	6	2012		10	40	161	4	32	4	112
SPZ 200 – 3		200	204	6	2012		10	40	171	4	32	4	112
SPZ 224 – 3		224	228	6	2012		12	40	195	4	32	4	112
SPZ 250 – 3		250	254	5	2012		–	40	221	4	32	4	112
SPZ 280 – 3		280	284	4	2517	60	–	40	251	2.5	45	2.5	124
SPZ 315 – 3		315	319	4	2517		–	40	286	2.5	45	2.5	124
SPZ 355 – 3		355	359	4	2517		–	40	326	2.5	45	2.5	124
SPZ 400 – 3		400	404	4	2517		–	40	371	2.5	45	2.5	124
SPZ 450 – 3		450	454	4	2517		–	40	421	2.5	45	2.5	124
SPZ 500 – 3		500	504	4	2517		–	40	471	2.5	45	2.5	124
SPZ 630 – 3		630	634	4	3020	75	–	40	601	5.5	51	5.5	150
SPZ 800 – 3		800	804	4	3020	75	–	40	771	5.5	51	5.5	146

SPZ-4 Pulley Dimensions

PTP part #	#Grooves	P	O	Fig	Bush	Max f	E	F	J	K	L	M	N
		mm	mm			mm	mm	mm	mm	mm	mm	mm	mm
SPZ 80 – 4	4	80	84	8	1210	32	–	52	51	27	25	–	–
SPZ 85 – 4		85	89	8	1610	42	–	52	60	27	25	–	–
SPZ 90 – 4		90	94	8	1610		–	52	61	27	25	–	–
SPZ 95 – 4		95	99	8	1610		–	52	66	27	25	–	–
SPZ 100 – 4		100	104	8	1610		–	52	71	27	25	–	–
SPZ 106 – 4		106	110	8	1610		–	52	76	27	25	–	–
SPZ 112 – 4		112	116	8	2012	50	–	52	83	20	32	–	–
SPZ 118 – 4		118	122	8	2012		–	52	90	20	32	–	–
SPZ 125 – 4		125	129	2	2012		–	52	96	–	32	20	–
SPZ 132 – 4		132	136	2	2012		–	52	103	–	32	20	–
SPZ 140 – 4		140	144	2	2012		–	52	111	–	32	20	–
SPZ 150 – 4		150	154	2	2517	60	–	52	121	–	45	7	–
SPZ 160 – 4		160	164	2	2517		–	52	131	–	45	7	–
SPZ 170 – 4		170	174	2	2517		–	52	141	–	45	7	–
SPZ 180 – 4		180	184	2	2517		–	52	151	–	45	7	–
SPZ 190 – 4		190	194	3	2517		–	52	161	3.5	45	3.5	–
SPZ 200 – 4		200	204	6	2517		8	52	171	3.5	45	3.5	124
SPZ 224 – 4		224	228	6	2517		14	52	195	3.5	45	3.5	124
SPZ 250 – 4		250	254	6	2517		12	52	221	3.5	45	3.5	124
SPZ 280 – 4		280	284	6	2517		14	52	251	3.5	45	3.5	124
SPZ 315 – 4		315	319	5	2517		–	52	286	3.5	45	3.5	124
SPZ 355 – 4		355	359	5	2517		–	52	326	3.5	45	3.5	124
SPZ 400 – 4		400	404	5	2517		–	52	371	3.5	45	3.5	124
SPZ 450 – 4		450	454	5	3020	75	–	52	421	0.5	51	0.5	146
SPZ 500 – 4		500	504	5	3020		–	52	471	0.5	51	0.5	146
SPZ 630 – 4		630	634	4	3030		–	52	601	12	76	12	146
SPZ 800 – 4		800	804	4	3030		–	52	771	12	76	12	146

SPZ-5 Pulley Dimensions

PTP part #	#Grooves	P	O	Fig	Bush	Max f	E	F	J	K	L	M	N
		mm	mm			mm	mm	mm	mm	mm	mm	mm	mm
SPZ 85 – 5	5	85	89	8	1610	42	–	64	60	39	25	–	–
SPZ 90 – 5		90	94	8	1610		–	64	61	39	25	–	–
SPZ 95 – 5		95	99	8	1610		–	64	66	39	25	–	–
SPZ 100 – 5		100	104	8	2012	50	–	64	71	32	32	–	–
SPZ 106 – 5		106	110	8	2012		–	64	76	32	32	–	–
SPZ 112 – 5		112	116	8	2012		–	64	83	32	32	–	–
SPZ 118 – 5		118	122	8	2012		–	64	90	32	32	–	–
SPZ 125 – 5		125	129	8	2012		–	64	96	32	32	–	–
SPZ 132 – 5		132	136	8	2517	60	–	64	103	19	45	19	–
SPZ 140 – 5		140	144	2	2517		–	64	111	–	45	19	–
SPZ 150 – 5		150	154	2	2517		–	64	121	–	45	19	–
SPZ 160 – 5		160	164	2	2517		–	64	131	–	45	19	–
SPZ 170 – 5		170	174	2	2517		–	64	141	–	45	19	–
SPZ 180 – 5		180	184	2	2517		–	64	151	–	45	19	–
SPZ 190 – 5		190	194	3	2517		–	64	161	9.5	45	9.5	–
SPZ 200 – 5		200	204	3	2517		–	64	171	9.5	45	9.5	–
SPZ 224 – 5		224	228	6	2517		20	64	195	9.5	45	9.5	124
SPZ 250 – 5		250	254	6	2517		16	64	221	9.5	45	9.5	124
SPZ 280 – 5		280	284	6	2517		15	64	251	9.5	45	9.5	124
SPZ 315 – 5		315	319	5	2517		–	64	286	9.5	45	9.5	124
SPZ 355 – 5		355	359	5	2517		–	64	326	9.5	45	9.5	124
SPZ 400 – 5		400	404	5	3020	75	–	64	371	6.5	51	6.5	146
SPZ 450 – 5		450	454	5	3020		–	64	421	6.5	51	6.5	146
SPZ 500 – 5		500	504	4	3030		–	64	471	6	76	6	146
SPZ 630 – 5		630	634	4	3030		–	64	601	6	76	6	146
SPZ 800 – 5		800	804	4	3535	90	–	64	771	12.5	89	12.5	178

SPZ-6 Pulley Dimensions

PTP part #	#Grooves	P	O	Fig	Bush	Max f	E	F	J	K	L	M	N
		mm	mm			mm	mm	mm	mm	mm	mm	mm	mm
SPZ 90 – 6	6	90	94	8	1610	42	–	76	61	51	25	–	–
SPZ 95 – 6		95	99	8	1610	42	–	76	66	51	25	–	–
SPZ 100 – 6		100	104	8	2012	50	–	76	71	44	32	–	–
SPZ 106 – 6		106	110	8	2012		–	76	76	44	32	–	–
SPZ 112 – 6		112	116	8	2012		–	76	83	44	32	–	–
SPZ 118 – 6		118	122	8	2517	60	–	76	90	31	45	–	–
SPZ 125 – 6		125	129	8	2517		–	76	96	31	45	–	–
SPZ 132 – 6		132	136	8	2517		–	76	103	31	45	–	–
SPZ 140 – 6		140	144	2	2517		–	76	111	–	45	31	–
SPZ 150 – 6		150	154	2	2517		–	76	121	–	45	31	–
SPZ 160 – 6		160	164	2	2517		–	76	131	–	45	31	–
SPZ 170 – 6		170	174	2	2517		–	76	141	–	45	31	–
SPZ 180 – 6		180	184	3	2517		–	76	151	15.5	45	15	–
SPZ 190 – 6		190	194	3	2517		–	76	161	15.5	45	15.5	–
SPZ 200 – 6		200	204	3	2517		–	76	171	15.5	45	15.5	124
SPZ 224 – 6		224	228	6	2517		26	76	195	15.5	45	15.5	124
SPZ 250 – 6		250	254	6	2517		26	76	221	15.5	45	15.5	124
SPZ 280 – 6		280	284	6	2517		15	76	251	15.5	45	15.5	124
SPZ 315 – 6		315	319	6	2517		15	76	286	15.5	45	15.5	124
SPZ 355 – 6		355	359	5	2517		–	76	326	15.5	45	15.5	124
SPZ 400 – 6		400	404	5	3030	75	–	76	371	–	76	–	146
SPZ 450 – 6		450	454	5	3030		–	76	421	–	76	–	146
SPZ 500 – 6		500	504	5	3030		–	76	471	–	76	–	146
SPZ 630 – 6		630	634	4	3535	90	–	76	601	6.5	89	6.5	175
SPZ 800 – 6		800	804	4	3535	90	–	76	771	6.5	89	65	178

SPZ-8 Pulley Dimensions

PTP part #	#Grooves	P	O	Fig	Bush	Max f	E	F	J	K	L	M	N
		mm	mm			mm	mm	mm	mm	mm	mm	mm	mm
SPZ 140 – 8	8	140	144	3	2517	60	–	100	111	27.5	45	27.5	–
SPZ 150 – 8		150	154	3	2517		–	100	121	27.5	45	27.5	–
SPZ 160 – 8		160	164	3	2517		–	100	131	27.5	45	27.5	–
SPZ 180 – 8		180	184	3	2517		–	100	151	27.5	45	27.5	–
SPZ 200 – 8		200	204	3	3020	75	–	100	171	24.5	51	24.5	–
SPZ 224 – 8		224	228	3	3020		–	100	195	24.5	51	24.5	–
SPZ 250 – 8		250	254	6	3020		20	100	221	24.5	51	24.5	146
SPZ 280 – 8		280	284	6	3020		20	100	251	24.5	51	24.5	146
SPZ 355 – 8		355	359	5	3030		–	100	326	12	76	12	146
SPZ 400 – 8		400	404	5	3030		–	100	371	12	76	12	146
SPZ 450 – 8		450	454	5	3535	90	–	100	421	5.5	89	5.5	175

Enquire Now

Downloads

V-Belt Pulleys (Taper Bore)

V-Belt Pulleys Solid Hub

V-Belt Pulleys (for use with locking elements

Enquire Now

Enquire Now About Pulleys

For any enquiries regarding Pulleys, please complete our enquiry form, and a member of our technical team will respond promptly. Alternatively, you can reach out directly to one of our offices using the contact details here. Our specialists are ready to provide guidance and support tailored to your machinery and engineering needs.