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High Torque Timing Pulleys S8M Type (Part Numbers)

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[Material]
· Pulley: Extra super duralumin aluminum alloy, S45C equivalent, SUS304
· Flange: Aluminum alloy, SPCC
[Surface treatment]
· Clear anodize, black anodize, hard clear anodize (firm hardness 300HV~), electroless nickel plating, black iron oxide coating

(i)Caution

Please note that the swaged flange options, NFC, RFC, and LFC, are not reflected in the CAD data.
Please check the content on our website as the PDF does not contain the most up-to-date information.

Part Number

Configured Part Number is shown.

Dimensional Drawing

High Torque Timing Pulleys - S8M: Related Image

Tooth groove dimensions slightly vary according to the number of teeth. (Pitch: 8.0mm)

■S8M

● Pulley Shape

Standard Tooth Profile

Shape A

[ ! ]1

[ ! ]2

Shape B

[ ! ]1

[ ! ]2

[ ! ] For aluminum flanges, the flange thickness is 1.5.
[ ! ] 1 t = 2.0 for 72 toothed pulleys (Machined Flange)
[ ! ] 2 Shaft Bore Specs. H (Round Hole), V or F (Stepped Hole), Y (Both Sides Stepped Hole) and WB (Two-stepped Hole) do not have tapped holes.
[ ! ] The tolerance of the tap position dimension from the boss end face and pulley end face is ±0.3.
[ ! ] For S8M600, select Shape A: W ≤ d × 5 and Shape B: L ≤ d × 5.
[ ! ] Unless otherwise specified except for teeth and F dimensions, the dimension tolerance conforms to JIS B 0405 Class m.
[ ! ] Compatible with S8M type from Mitsuboshi Belting Ltd. as well as Bando Chemical Industries Ltd.

●Shaft Bore Specification Select shaft bore spec mark and each dim. from the table below.
[ ! ] Surface treatment may not be applied to shaft bores.
[ ! ] No standard value is specified for chamfering of d dim.

H Round Hole	P Round Hole + Tap	N New JIS Keyway + Tap C Old JIS Keyway + Tap

	[ ! ] For A-Shape pulley, the screw holes are set at around 120° to keep away from peaks.	[ ! ] Specify NK10 when selecting "New JIS Keywayed Bore" + "Shaft Bore Diameter 10" + "Keyway Width 4.0 mm". [ ! ] The difference between part number N10 and NK10 is the machining dimensions. See the table below, "New JIS Keyway Dimension Tolerance," for details. [ ! ] The position of the keyway and the phase of the teeth are not guaranteed.

V Stepped Hole

F Stepped Hole
(Counterbored Hole on the Hub Side)

Y Both Ends Stepped Hole

WB Two-stepped Hole

[ ! ] Z-V(d) ≥ 2

[ ! ] 3.0 ≤ J ≤ W-3.0
(S8M600 only) 5 ≤ J ≤ W-5.0

[ ! ] Applicable to Shape B only
[ ! ] Z-F(d) ≥ 2

[ ! ] 3.0 ≤ J ≥ L-3.0
(S8M600 only) 5 ≤ J ≤ L-5.0

[ ! ] Applicable to Shape A only
[ ! ] Q-Y(d) ≥ 2
[ ! ] R-Y(d) ≥ 2

[ ! ] S+T ≤ W-3.0
(S8M600 only) S+T ≤ W-5.0

[ ! ] S (T) ≥ 3.0
(S8M600 only) S (T) ≥ 5.0

[ ! ] Applicable to Shape A only
[ ! ] Q-R ≥ 2
[ ! ] R-WB(d) ≥ 2

[ ! ] S+T ≤ W-3.0
(S8M600 only) S+T ≤ W-5.0

[ ! ] S (T) ≥ 3.0
(S8M600 only) S (T) ≥ 5.0

■Belt Nominal Width / Dimensions

mm	Nominal
mm	S8M150	S8M250	S8M300	S8M400	S8M600
A	17	28	33	44	65
W	22	33	38	49	70
L (Number of Teeth: 18 to 43)	37	48	53	64	85
L (Number of Teeth: 44 to 72)	42	53	58	69	90

■Tapped Hole Dimensions (Shaft Bore Specs.: P,N,C)

d_H7 Shaft Bore I.D.	M (Coarse)	Accessory Set Screws	Number of Accessories Included
12	M4	M4 × 3	2
13 to 17	M5	M5 × 4
18 to 30	M6	M6 × 5
31 to 45	M8	M8 × 6
46 to 70	M10	M10 × 8

[ ! ] No specification is set for the tightening torque
of the set screw.

Dimensional tolerances without command

Dimension Range		Tolerance (mm)
Over	or Less	Tolerance (mm)
0.5	3	±0.1
3	6	±0.1
6	30	±0.2
30	120	±0.3

[ ! ] Compliant with JIS B 0405 Class m
(Medium Class).

■Keyway Dimension Table

d Dimensional Tolerance (H7)

Nominal(N,C)	d_H7
8 to 10(K)	＋0.015 0
11 to 18	＋0.018 0
19 to 30	＋0.021 0
31 to 50	＋0.025 0
51 to 70	＋0.030 0

New JIS Keyway Dimension Tolerance

Nominal(N)	b_JS9		t
8 to 10	3	±0.0125	1.4	＋0.1 0
10K to 12	4	±0.0150	1.8
13 to 17	5		2.3
18 to 22	6		2.8
23 to 30	8	±0.0180	3.3	＋0.2 0
31 to 38	10	±0.0180
39 to 44	12	±0.0215
45 to 50	14		3.8
55	16		4.3

Old JIS Keyway Dimension Tolerance

Nominal(C)	b_JS9		t
10 to 12	4	＋0.022 ＋0.010	1.5	＋0.1 0
15 to 20	5		2

■Pulley Shape and Shaft Bore Machining Table

Shape	Hole
Shape	H	P	N(C)	V	F	Y	WB
A	○	○	○	○	‐	○	○
B	○	○	○	○	○	‐	‐

Type	Belt Width					[ M ] Material		[ S ] Surface Treatment	[ A ] Accessory Set Screws
	15 mm	25 mm	30 mm	40 mm	60 mm	Pulley	Flange
	S8M150	S8M250	S8M300	S8M400	S8M600	Pulley	Flange
HTPA	●	●	●	●	●	Extra Super Duralumin Aluminum alloy	Aluminum alloy	Clear Anodize	SUS304
HTPB	●	●	●	●	●			Black Anodize
HTPK	●	●	●	●	●			Hard Clear Anodize
HTPN	●	●	●	●	●			Electroless nickel plating
HTPT	●	●	●	●	●	S45C Equivalent	SPCC	-	SCM435 (Black Oxide)
HTPM	●	●	●	●	●			Black Oxide Coating
HTPP	●	●	●	●	●			Electroless nickel plating
HTPS	●	●	●	-	-	SUS304	SUS304	-	SUS304

[ ! ] Flange is already swaged, and set screws are included for Shaft Bores P, N and C.
[ ! ] Due to vibrations during transportation, the set screw may become detached from the main body.
[ ! ] For orders with no flange, please specify the alteration NFC.

Specification Table

Part number

Pulley Shape

Shaft Bore Specs.: I.D.

(Shaft Bore Specs.: H, P, N, C)

HTPA36S8M250

H65

(Shaft Bore Specs.: V, F)

HTPA30S8M300

V20

Z38

J23.0

(Shaft Bore Specs.: Y, WB)

HTPA40S8M250

Y30

Q62

R47

S16

Part number			Pulley Shape	Pulley Shape						P.D.	O.D	D	F	E
Type	Number of Teeth	Type Nominal Width		A			B
				Shaft Bore Specs.
				H Round Hole V·Y·WB Stepped Hole	P Round Hole Tapped	N·C Keyway Tapped	H Round Hole V·F Stepped Hole	P Round Hole Tapped	N·C Keyway Tapped
				d1 mm increments / Selectable
Aluminum HTPA HTPB HTPK HTPN Steel HTPT HTPM HTPP Stainless Steel HTPS	18	S8M150 S8M250 S8M300 S8M400 S8M600	A B	12 to 32	12 to 26	12 to 26	12 to 28	12 to 22	12 to 20	45.84	44.46	32	52	36
	19			12 to 36	12 to 28	12 to 28	12 to 31	12 to 25		48.38	47.01	35	55	40
	20			12 to 36	12 to 30	12 to 30	12 to 32	12 to 26	12 to 22	50.93	49.56	36	58
	21			12 to 41	12 to 32	12 to 32	12 to 36	12 to 30	12 to 24	53.48	52.10	40	61	45
	22				12 to 34	12 to 34	12 to 37		12 to 25	56.02	54.65	41
	23			12 to 46	12 to 40	12 to 40	12 to 42	12 to 34	12 to 28	58.57	57.20	46	67	50
	24									61.12	59.74
	25			12 to 52			12 to 44	12 to 36		63.66	62.29	48	70	56
	26			14 to 54	14 to 45	14 to 45	14 to 47	14 to 39	14 to 31	66.21	64.84	51	74	58
	27			14 to 56	14 to 48	14 to 48	14 to 51	14 to 43	14 to 35	68.75	67.38	55	80	60
	28									71.30	69.93
	29									73.85	72.48
	30			14 to 63	14 to 50	14 to 50	14 to 56	14 to 46	14 to 38	76.39	75.02	60	87	67
	31									78.94	77.57
	32				14 to 55	14 to 55	14 to 59	14 to 49	14 to 45	81.49	80.12	63
	33									84.03	82.66
	34			16 to 67	16 to 60	16 to 55	16 to 66	16 to 56	16 to 48	86.58	85.21	70	95	75
	35									89.13	87.75
	36			16 to 72	16 to 65		16 to 71	16 to 61	16 to 50	91.67	90.30	75	99	80
	37									94.22	92.85
	38			16 to 76			16 to 76	16 to 65		96.77	95.39	80	104	84
	39			20 to 80	20 to 70	20 to 55	20 to 80	20 to 65	20 to 55	99.31	97.94	85	111	90
	40									101.86	100.49
	41									104.41	103.03
	42									106.95	105.58
	43			20 to 85				20 to 70		109.50	108.13	90	119	100
	44									112.05	110.67
	45									114.59	113.22	97	123	102
	46									117.14	115.77
	47									119.68	118.31	100	127	105
	48									122.23	120.86
	49									124.78	123.41		135	115
	50									127.32	125.95
	51									129.87	128.50
	52									132.42	131.04		140	120
	53									134.96	133.59
	54									137.51	136.14		144	125
	55									140.06	138.68
	56									142.60	141.23		152	130
	57									145.15	143.78
	58									147.70	146.32		160	140
	59									150.24	148.87
	60									152.79	151.42
	72									183.35	181.97		190	170
[ NG ] Shaft Bore Dia. 51 to 54 are not available for Shaft Bore Spec. N. [ NG ] Shaft Bore Dia. 8, 11, 13, 14, 17, or 21 to 55 are not available for Shaft Bore Spec. C. [ NG ] For S8M600, Shaft Bore Dia. 22 or less are not available for Shaft Bore Specs. N and C.

Alterations

Part number

Pulley Shape

Shaft Bore Specs.: I.D.

(KC90, etc.)

HTPA60S8M250

H65

KSC80-K8

Alterations	Set Screw Angle Change	No Flange	Single Flange	Flange Cut
Code	KC90	NFC	RFC·LFC	FC
Spec.	Changes an angle of set screw to 90°. [ ! ] For A-Shape pulley, the screw holes are set at around 90° to keep away from peaks.	(Flange 2 pcs. Included) Ordering Code NFC	(Flange 1 pc. Included) Ordering Code RFC	Cut the flange O.D. in 0.5 mm increments. Ordering Code FC17 Application Notes [ ! ] FC ≥ (O.D.) +1 [ ! ] FC ≤ F-2 [ ! ] No surface treatment is applied on flange circumference.

Alterations

Retaining Ring Groove

Taper for Bearing Holder

Hub Shortening

Tapped Hole Dimensions

Included Set Screw Length Change

Code

SRG

BTC

TPC

SLH

Spec.

Retaining Ring Groove applicable to the shaft dia. of stepped hole is machined.

Specify SRG 2.5 to 40.5 mm
0.5 mm Increments

Applicable Conditions
[ ! ] Minimum Thickness: 2 mm
[ ! ] Applicable to Shaft Bore Specs. V and F only
[ ! ] Standards of retaining ring groove for Z dim. is applied
[ ! ] n ≤ J-SRG-m
Ordering Code SRG7

Taper for retaining bearing inner ring

Ordering Code BTC15-TL4
Application Notes
[ ! ] Applicable to Shape A only
[ ! ] Applicable to Shaft Bore Specs. H and P only
[ ! ] TL < L-W

[ ! ] When E-D ≤ 6, one side installed
and 1 pc. of flange included

Cuts the hub length in 0.5 mm increments.
Ordering Code BC6.5

Application Notes

[ ! ] Shaft Bore Specs. H, V, F:
3 ≤ BC < L-W

[ ! ] Shaft Bore Specs. P, N, C:
M+3 ≤ BC < L-W

[ NG ] Not applicable to Shape A

Ordering Code TPC5
Application Notes

[ ! ] Applicable to Shaft Bore Specs. P, N, C only

M	TPC
M4	M5
M5	M4·M6
M6	M5·M8
M8	M6·M10
M10	M8

Ordering Code SLH10
Application Notes

[ ! ] Applicable to Shaft Bore Specs. P, N, C only

Set Screws	SLH
M4 × 3	5·8
M5 × 4	6·10
M6 × 5	10
M8 × 6	10·12
M10 × 8	12·15

Alterations	Add Side Holes
Alterations	Side Tapped Hole	Side Through Hole	Side Counterbored
Code	QTC·QFC·QSC	KTC·KFC·KSC	ZTC·ZFC·ZSC
Spec.	Machines tapped hole on the side surface of hub side. Ordering Code QTC28-M4 Q□C Selection Specify the hole position (P. C. D. dim.). M Selection M3, M4, M5, M6, M8 Application Notes [ ! ] Thickness condition: minimum 2 mm. (6 Locations) (4 Locations) (3 Locations)	Machines through hole on the side surface. Ordering Code KTC28-K4.5 K□C Selection Specify the hole position (P. C. D. dim.). Specify K K4.0 to 13.0 (0.5 mm Increments) Application Notes [ ! ] Thickness condition: minimum 2 mm. (6 Locations) (4 Locations) (3 Locations)	Machines counterbored hole on the side surface. Ordering Code ZTC28-ZM4 Z□C Selection Specify the hole position (P. C. D. dim.). ZM Selection ZM3, ZM4, ZM5, ZM6, ZM8 Application Notes [ ! ] Thickness condition: minimum 2 mm. (6 Locations) (4 Locations) (3 Locations)

[ ! ] Conditions for side hole alteration vary depending on the shaft bore specification.

Part Number

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Part Number
HTPA19S8M400-B-C[12,15,16,18,19,20]
HTPA19S8M400-B-F[12-29/1]
HTPA19S8M400-B-H[12-31/1]
HTPA19S8M400-B-N[12-20/1]
HTPA19S8M400-B-P[12-25/1]
HTPA19S8M400-B-V[12-29/1]
HTPA20S8M150-A-C[12,15,16,18,19,20]
HTPA20S8M150-A-H[12-32/1]
HTPA20S8M150-A-N[12-30/1]
HTPA20S8M150-A-P[12-30/1]
HTPA20S8M150-A-V[12-30/1]
HTPA20S8M150-A-Y[12-30/1]
HTPA20S8M150-B-C[12,15,16,18,19,20]
HTPA20S8M150-B-F[12-30/1]
HTPA20S8M150-B-H[12-32/1]
HTPA20S8M150-B-N[12-22/1]
HTPA20S8M150-B-P[12-26/1]
HTPA20S8M150-B-V[12-30/1]
HTPA20S8M250-A-C[12,15,16,18,19,20]
HTPA20S8M250-A-H[12-32/1]
HTPA20S8M250-A-N[12-30/1]
HTPA20S8M250-A-P[12-30/1]
HTPA20S8M250-A-V[12-30/1]
HTPA20S8M250-A-Y[12-30/1]
HTPA20S8M250-B-C[12,15,16,18,19,20]
HTPA20S8M250-B-F[12-30/1]
HTPA20S8M250-B-H[12-32/1]
HTPA20S8M250-B-N[12-22/1]
HTPA20S8M250-B-P[12-26/1]
HTPA20S8M250-B-V[12-30/1]
HTPA20S8M300-A-C[12,15,16,18,19,20]
HTPA20S8M300-A-H[12-32/1]
HTPA20S8M300-A-N[12-30/1]
HTPA20S8M300-A-P[12-30/1]
HTPA20S8M300-A-V[12-30/1]
HTPA20S8M300-A-Y[12-30/1]
HTPA20S8M300-B-C[12,15,16,18,19,20]
HTPA20S8M300-B-F[12-30/1]
HTPA20S8M300-B-H[12-32/1]
HTPA20S8M300-B-N[12-22/1]
HTPA20S8M300-B-P[12-26/1]
HTPA20S8M300-B-V[12-30/1]
HTPA20S8M400-A-C[12,15,16,18,19,20]
HTPA20S8M400-A-H[12-32/1]
HTPA20S8M400-A-N[12-30/1]
HTPA20S8M400-A-P[12-30/1]
HTPA20S8M400-A-V[12-30/1]
HTPA20S8M400-A-Y[12-30/1]
HTPA20S8M400-B-C[12,15,16,18,19,20]
HTPA20S8M400-B-F[12-30/1]
HTPA20S8M400-B-H[12-32/1]
HTPA20S8M400-B-N[12-22/1]
HTPA20S8M400-B-P[12-26/1]
HTPA20S8M400-B-V[12-30/1]
HTPA21S8M150-A-C[12,15,16,18,19,20]
HTPA21S8M150-A-H[12-37/1]
HTPA21S8M150-A-N[12-32/1]
HTPA21S8M150-A-P[12-32/1]
HTPA21S8M150-A-V[12-35/1]
HTPA21S8M150-A-Y[12-35/1]
HTPA21S8M150-B-C[12,15,16,18,19,20]
HTPA21S8M150-B-F[12-34/1]
HTPA21S8M150-B-H[12-36/1]
HTPA21S8M150-B-N[12-24/1]
HTPA21S8M150-B-P[12-30/1]
HTPA21S8M150-B-V[12-34/1]
HTPA21S8M250-A-C[12,15,16,18,19,20]
HTPA21S8M250-A-H[12-37/1]
HTPA21S8M250-A-N[12-32/1]
HTPA21S8M250-A-P[12-32/1]
HTPA21S8M250-A-V[12-35/1]
HTPA21S8M250-A-Y[12-35/1]
HTPA21S8M250-B-C[12,15,16,18,19,20]
HTPA21S8M250-B-F[12-34/1]
HTPA21S8M250-B-H[12-36/1]
HTPA21S8M250-B-N[12-24/1]
HTPA21S8M250-B-P[12-30/1]
HTPA21S8M250-B-V[12-34/1]
HTPA21S8M300-A-C[12,15,16,18,19,20]
HTPA21S8M300-A-H[12-37/1]
HTPA21S8M300-A-N[12-32/1]
HTPA21S8M300-A-P[12-32/1]
HTPA21S8M300-A-V[12-35/1]
HTPA21S8M300-A-Y[12-35/1]
HTPA21S8M300-B-C[12,15,16,18,19,20]
HTPA21S8M300-B-F[12-34/1]
HTPA21S8M300-B-H[12-36/1]
HTPA21S8M300-B-N[12-24/1]
HTPA21S8M300-B-P[12-30/1]
HTPA21S8M300-B-V[12-34/1]

Standard Unit Price	Minimum order quantity	Days to Ship	RoHS	Belt Width Used (mm)	No. of Teeth (T)	Pulley Shape	Material	Surface Treatment	Shaft Bore Specifications (Both Ends Stepped Hole) [Y] (mm)	Shaft Bore Specifications (New JIS Keyway Hole + Tap) [N] (mm)	Shaft Bore Specifications (Old JIS Keyway Hole + Tap) [C] (mm)	Shaft Bore Specifications (Round Hole + Tap) [P] (mm)	Shaft Bore Specifications (Round Hole) [H] (mm)	Shaft Bore Specifications (Stepped Hole) [V] (mm)	Shaft Bore Specifications (Stepped Hole: Counterbored Holes on the Hub Side) [F] (mm)	Shaft Bore Specifications (Two-stepped Hole) [WB] (mm)
-	1 Piece(s)	7 Day(s)	10	40	19	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	12 ～ 20	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	40	19	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	-	12 ～ 29	-
-	1 Piece(s)	7 Day(s)	10	40	19	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	12 ～ 31	-	-	-
-	1 Piece(s)	7 Day(s)	10	40	19	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	12 ～ 20	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	40	19	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	12 ～ 25	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	40	19	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	12 ～ 29	-	-
-	1 Piece(s)	7 Day(s)	10	15	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	12 ～ 20	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	12 ～ 32	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	12 ～ 30	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	12 ～ 30	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	12 ～ 30	-	-
-	1 Piece(s)	7 Day(s)	10	15	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	12 ～ 30	-	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	12 ～ 20	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	-	12 ～ 30	-
-	1 Piece(s)	7 Day(s)	10	15	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	12 ～ 32	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	12 ～ 22	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	12 ～ 26	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	12 ～ 30	-	-
-	1 Piece(s)	7 Day(s)	10	25	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	12 ～ 20	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	12 ～ 32	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	12 ～ 30	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	12 ～ 30	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	12 ～ 30	-	-
-	1 Piece(s)	7 Day(s)	10	25	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	12 ～ 30	-	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	12 ～ 20	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	-	12 ～ 30	-
-	1 Piece(s)	7 Day(s)	10	25	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	12 ～ 32	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	12 ～ 22	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	12 ～ 26	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	12 ～ 30	-	-
-	1 Piece(s)	7 Day(s)	10	30	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	12 ～ 20	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	12 ～ 32	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	12 ～ 30	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	12 ～ 30	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	12 ～ 30	-	-
-	1 Piece(s)	7 Day(s)	10	30	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	12 ～ 30	-	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	12 ～ 20	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	-	12 ～ 30	-
-	1 Piece(s)	7 Day(s)	10	30	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	12 ～ 32	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	12 ～ 22	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	12 ～ 26	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	12 ～ 30	-	-
-	1 Piece(s)	7 Day(s)	10	40	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	12 ～ 20	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	40	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	12 ～ 32	-	-	-
-	1 Piece(s)	7 Day(s)	10	40	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	12 ～ 30	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	40	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	12 ～ 30	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	40	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	12 ～ 30	-	-
-	1 Piece(s)	7 Day(s)	10	40	20	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	12 ～ 30	-	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	40	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	12 ～ 20	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	40	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	-	12 ～ 30	-
-	1 Piece(s)	7 Day(s)	10	40	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	12 ～ 32	-	-	-
-	1 Piece(s)	7 Day(s)	10	40	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	12 ～ 22	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	40	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	12 ～ 26	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	40	20	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	12 ～ 30	-	-
-	1 Piece(s)	7 Day(s)	10	15	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	12 ～ 20	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	12 ～ 37	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	12 ～ 32	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	12 ～ 32	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	12 ～ 35	-	-
-	1 Piece(s)	7 Day(s)	10	15	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	12 ～ 35	-	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	12 ～ 20	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	-	12 ～ 34	-
-	1 Piece(s)	7 Day(s)	10	15	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	12 ～ 36	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	12 ～ 24	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	12 ～ 30	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	15	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	12 ～ 34	-	-
-	1 Piece(s)	7 Day(s)	10	25	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	12 ～ 20	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	12 ～ 37	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	12 ～ 32	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	12 ～ 32	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	12 ～ 35	-	-
-	1 Piece(s)	7 Day(s)	10	25	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	12 ～ 35	-	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	12 ～ 20	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	-	12 ～ 34	-
-	1 Piece(s)	7 Day(s)	10	25	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	12 ～ 36	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	12 ～ 24	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	12 ～ 30	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	25	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	12 ～ 34	-	-
-	1 Piece(s)	7 Day(s)	10	30	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	12 ～ 20	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	12 ～ 37	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	12 ～ 32	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	12 ～ 32	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	12 ～ 35	-	-
-	1 Piece(s)	7 Day(s)	10	30	21	Shape A	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	12 ～ 35	-	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	12 ～ 20	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	-	12 ～ 34	-
-	1 Piece(s)	7 Day(s)	10	30	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	12 ～ 36	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	12 ～ 24	-	-	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	12 ～ 30	-	-	-	-
-	1 Piece(s)	7 Day(s)	10	30	21	Shape B	[Aluminum] Extra Super Duralumin Series Aluminum Alloy	Clear Anodize	-	-	-	-	-	12 ～ 34	-	-

Product TOP

Basic Information

Type	Timing Pulleys	Belt Type	S8M	Timing Pulley / Idler	Pulleys
Features, Areas of Application	Not Applicable	Environmental Compliance	RoHS compliant (10 substances)

Configure

7,439 Part Numbers

View Part Numbers

Configure Remaining Specifications

Completed

Specification/Dimensions

Belt Width Used(mm)
15

25

30

40
Clear
No. of Teeth(T)
18

19

20

21

22

24

25

26

28

30

32

34

36

38

40

44

48

50

60

72
Clear
Pulley Shape
- Shape A
- Shape B
Clear
Material
- Steel
  - S45C Equivalent
- Aluminum
  - Extra Super Duralumin Series Aluminum Alloy
Clear
Surface Treatment
- Not Provided
- Black Oxide Coating
- Clear Anodize
- Black Anodize
- Hard Clear Anodize
- Electroless Nickel Plating
Clear
Shaft Bore Specifications (Both Ends Stepped Hole) [Y](mm)
[12-85/0.1mm Unit(s)][12-85/1mm Unit(s)]
Clear
Shaft Bore Specifications (New JIS Keyway Hole + Tap) [N](mm)
55
[12-50/1mm Unit(s)]
Clear
Shaft Bore Specifications (Old JIS Keyway Hole + Tap) [C](mm)
12

15

16

18

19

20
Clear
Shaft Bore Specifications (Round Hole + Tap) [P](mm)
12.7
[12-70/1mm Unit(s)]
Clear
Shaft Bore Specifications (Round Hole) [H](mm)
12.7
[12-85/1mm Unit(s)]
Clear
Shaft Bore Specifications (Stepped Hole) [V](mm)
[12-85/1mm Unit(s)]
Clear
Shaft Bore Specifications (Stepped Hole: Counterbored Holes on the Hub Side) [F](mm)
[12-85/1mm Unit(s)]
Clear
Shaft Bore Specifications (Two-stepped Hole) [WB](mm)
[12-85/0.1mm Unit(s)]
Clear
type
- HTPA□□S8M
- HTPB□□S8M
- HTPK□□S8M
- HTPM□□S8M
- HTPN□□S8M
- HTPP□□S8M
- HTPT□□S8M
Clear
CAD
- 2D
- 3D
Clear

Days to Ship

All

5 Day(s) or Less

6 Day(s) or Less

7 Day(s) or Less

8 Day(s) or Less

10 Day(s) or Less
Clear

Specify Alterations

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

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High Torque Timing Pulleys S8M Type (Part Numbers)

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Dimensional Drawing

Specification Table

Alterations

Part Number

Basic Information

Configure

Specification/Dimensions

Belt Width Used(mm)

No. of Teeth(T)

Pulley Shape

Material

Surface Treatment

Shaft Bore Specifications (Both Ends Stepped Hole) [Y](mm)

Shaft Bore Specifications (New JIS Keyway Hole + Tap) [N](mm)

Shaft Bore Specifications (Old JIS Keyway Hole + Tap) [C](mm)

Shaft Bore Specifications (Round Hole + Tap) [P](mm)

Shaft Bore Specifications (Round Hole) [H](mm)

Shaft Bore Specifications (Stepped Hole) [V](mm)

Shaft Bore Specifications (Stepped Hole: Counterbored Holes on the Hub Side) [F](mm)

Shaft Bore Specifications (Two-stepped Hole) [WB](mm)

type

CAD

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