Standard timing pulley L type

Brand :

MITSUBOSHI_BELT

Caution

Some of the items are scheduled to be discontinued as of end of March in 2023. The manufacturer keep the items produced but they are not available with Misumi.
There are not the replacement items and the plan to resumption of sale. Please check the quotation and order screen for details.

Product Description

Timing Pulley L Type
This Timing Pulley has an easily specified shaft hole type and diameter. MISUMI can machine the shaft hole for the pulley that is compatible with the Mitsuboshi belt, even without the need for detailed drawings
[Feature]
● Belt Width Used (mm.) : 12.7, 19 and 25.4
● Belt Width Used (Inch.) : 0.5, 0.75, 1 and 7.5
● Applicable with Belt Type : L
● Number of Teeth Minimum/Maximum : 10 to 72
● Shaft Bore Diameter Minimum/Maximum (mm.) : 6 to 38
● Shaft Bore Specs. : Can select between Round Hole, Round Hole + Tap and New JIS keyway + Tap
● Material : Steel
[Application]
Timing pulleys are frequently utilized in systems that incorporate timing belts to regulate and govern the movement of the machinery.

Drawing

Shape A

Shape B

Shape W

Specifications Table

Pulley dimension table specified by standard pulley width

Nominal width	Belt width (mm)	Pulley width L_A(mm)	Overall Width L_B (mm)	Overall Width L_W (mm)	Tooth Width W (mm)	Flange Step Width H (mm)	Undercut Depth G (mm)
050	12.7	19	10 to 30 teeth: 31	39	14	2.5	(5.5)
			32 to 42 teeth: 34
			44 teeth: 39
075	19.0	26	12 to 30 teeth: 38	46	21		(8)
			32 to 42 teeth: 41
			44 teeth: 46
100	25.4	33	For 14 to 30 teeth: 45	53	28		(11)
			32–42 teeth: 48
			44 teeth: 53

Pulley dimension table specified by standard number of pulley teeth

Number of pulley teeth	Pulley shape	Material	Pitch diameter PD (mm)	Outer diameter OD (mm)	Boss width K (mm)	Boss diameter D (mm)	Shaft hole diameter d (mm)		Relief diameter E (mm)	Compatible flange size
Number of pulley teeth	Pulley shape	Material	Pitch diameter PD (mm)	Outer diameter OD (mm)	Boss width K (mm)	Boss diameter D (mm)	Min	max	Relief diameter E (mm)	Thickness	F	M
*1 10	A/B	Steel	30.32	29.56	12	20	6	14	-	F-10	35	22
*1 12			36.38	35.62		25	8	18		F-10	43	28
14			42.45	41.68		30	10	20		F-10	47	34
15			45.48	44.72		32	10	20		F-16	51	36
16			48.51	47.75		34	12	22		F-16	55	39
17			51.54	50.78		35	12	22		F-16	57	41
18			54.57	53.81		36	12	24		F-16	61	41
19			57.61	56.84		38	12	24		F-16	65	50
20			60.64	59.88		40	12	26		F-16	65	50
21			63.67	62.91		42	12	26		F-16	69	50
22			66.70	65.94		44	12	28		F-16	74	53
24			72.77	72.00		44	12	28		F-16	78	58
25			75.80	75.04		44	12	28		F-16	83	63
26			78.83	78.07		44	12	28		F-16	86	66
28			84.89	84.13		50	12	30		F-16	93	75
30			90.96	90.20		50	12	30		F-16	99	78
32			97.02	96.26	15	50	16	30		F-16	105	84
34			103.08	102.32		56	16	32		F-16	112	90
36			109.15	108.39		56	16	32		F-16	115	90
38			115.21	114.45		60	16	34		F-16	126	100
40			121.28	120.51		60	16	34		F-16	126	100
44			133.40	132.64		65	16	38		F-16	138	125
48	W	Casting	145.53	144.77	20	65	16	38	(124)	-
50			151.60	150.83		65	16	38	(130)
60			181.91	181.15		65	16	38	(160)
72			218.30	217.53		65	16	38	(197)

*1 For nominal width 075, 12 teeth or more, and for nominal width 100, 14 teeth or more are standard products.

Shaft Bore Specification Table

HRound hole	PRound hole + tap	KNew JIS keyway	TKNew JIS Keyway Bore + Tap (1 location) NNew JIS Keyway Bore + Tap (2 locations) COld JIS Keyway Bore + Tap (2 locations)

[ ! ]No tapped holes or set screws.	[ ! ]For Shape A pulley, the screw holes are set at around 120° to keep away from peaks.

V V Stepped Hole	F Stepped Hole (Counterbored Hole on the Hub Side)	Y Both Ends Stepped Hole	WB Two-stepped Hole

[ ! ]No tapped holes or set screws.

Shaft hole specifications	Number of teeth, tooth profile, nominal width, pulley shape	-	Surface treatment	-	Shaft hole specifications	-	Inner diameter	-	Z	-	J	-	Q	-	R	-	S	-	T
H·T·P·TK·N·K·C	P16L100B	-	NI	-	T		12
V, F	P26L075A	-	BL	-	V	-	55	-	Z67	-	J15
Y, WB	P36L050A	-	NA	-	Y	-	55					-	Q50	-	R75	-	S10	-	T2

Number of teeth		Tooth profile	Nominal width	Pulley shape	Surface treatment	Pulley shape
						B
						Shaft Bore Specification: 1 mm Increments / Selection
						H (d) Round Hole	P (d) ·T (d) Round hole + Tapped hole	K (d) Keyway ·N (d) ·TK (d) Keyway + tapped	C (d) Keyway + tapped	V, F Stepped hole
						H (d) Round Hole	P (d) ·T (d) Round hole + Tapped hole	K (d) Keyway ·N (d) ·TK (d) Keyway + tapped	C (d) Keyway + tapped	V (d) · F (d)	Z Z-d ≥ 2	J (0.1 mm increments)
P	10	L	050 075 100	A B	NA (base material) BL (black oxide coating) NI (electroless nickel plating)	6-14	6-14	10	10	6 to 12	8 to 14	3.0 ≤ J ≤ LB-3.0
	12					8 to 18	8 to 18	10 to 11	10 to 12	8 to 17	10 to 19
	14					10-20	10-20	10 to 16	10 to 18	10 to 22	12 to 24
	15					10-20	10-20	10 to 18	10-20	10 to 24	12 to 26
	16					12 to 22	12 to 22	12 to 19	12-20	12 to 26	14 to 28
	17					12 to 22	12 to 22	12-20	12-20	12 to 27	14 to 29
	18					12 to 24	12 to 24	12 to 21	12-20	12 to 28	14 to 30
	19					12 to 24	12 to 24	12-23	12-20	12 to 30	14 to 32
	20					12 to 26	12 to 26	12-25	12-20	12 to 30	14 to 32
	21					12 to 26	12 to 26	12 to 26	12-20	12 to 32	14 to 34
	22					12 to 28	12 to 28	12 to 28	12-20	12 to 34	14 to 36
	24					12 to 28	12 to 28	12 to 28	12-20	12 to 34	14 to 36
	25					12 to 28	12 to 28	12 to 28	12-20	12 to 34	14 to 36
	26					12 to 28	12 to 28	12 to 28	12-20	12 to 34	14 to 36
	28					12 to 30	12 to 30	12 to 30	12-20	12 to 40	12 to 42
	30					12 to 30	12 to 30	12 to 30	12-20	12 to 40	12 to 42
	32					16-30	16-30	16-30	16 to 20	16-40	18-42
	34					16-32	16-32	16-32	16 to 20	16 to 46	18 to 48
	36					16-32	16-32	16-32	16 to 20	16 to 46	18 to 48
	38					16 to 34	16 to 34	16 to 34	16 to 20	16 to 50	18 to 52
	40					16 to 34	16 to 34	16 to 34	16 to 20	16 to 50	18 to 52
	44					16 to 38	16 to 38	16 to 38	16 to 20	16 to 55	18 to 57
	48			W	NA (base material) BL (black oxide coating)	-	-	-	-	-	-	-
	50
	60
	72

Number of teeth	Pulley shape	Pulley shape
		A·W
		Shaft Bore Specification: 1 mm Increments / Selection
		H (d) round hole	P (d) ·T (d) round hole + Tap	K (d) Keyway ·N (d) · TK (d) Keyway + Tap	C (d) Keyway + tapped	V Stepped hole			Y Y Both Sides Stepped Hole, WB Two-stepped Hole
		H (d) round hole	P (d) ·T (d) round hole + Tap	K (d) Keyway ·N (d) · TK (d) Keyway + Tap	C (d) Keyway + tapped	V (d)	Z Z-d ≥ 2	J (0.1 mm increments)	Y (d) · WB (d)	Q, R	S, T (0.1 mm increments)
10	A B	6-14	6-14	10 to 14	10 to 12	6-14	8 to 16	3.0 ≤ J ≤ LA-3.0	6-14	8 to 16	S+T ≤ LA-3
12		8 to 18	8 to 18	10 to 18	10 to 18	8 to 20	10 to 22		8 to 20	10 to 22
14		10-20	10-20	10-20	10-20	10 to 26	12 to 28		10 to 26	12 to 28
15		10-20	10-20	10-20	10-20	10 to 28	12 to 30		10 to 28	12 to 30
16		12 to 22	12 to 22	12 to 22	12-20	12 to 31	14 to 33		12 to 31	14 to 33
17		12 to 22	12 to 22	12 to 22	12-20	12 to 31	14 to 33		12 to 31	14 to 33
18		12 to 24	12 to 24	12 to 24	12-20	12 to 31	14 to 33		12 to 31	14 to 33
19		12 to 24	12 to 24	12 to 24	12-20	12 to 40	14 to 42		12 to 40	14 to 42
20		12 to 26	12 to 26	12 to 26	12-20	12 to 40	14 to 42		12 to 40	14 to 42
21		12 to 26	12 to 26	12 to 26	12-20	12 to 40	14 to 42		12 to 40	14 to 42
22		12 to 28	12 to 28	12 to 28	12-20	12 to 43	12 to 45		12 to 43	12 to 45
24		12 to 28	12 to 28	12 to 28	12-20	12 to 48	14 to 50		12 to 48	14 to 50
25		12 to 28	12 to 28	12 to 28	12-20	12 to 53	14 to 55		12 to 53	14 to 55
26		12 to 28	12 to 28	12 to 28	12-20	12 to 56	14 to 58		12 to 56	14 to 58
28		12 to 30	12 to 30	12 to 30	12-20	12 to 65	14 to 67		12 to 65	14 to 67
30		12 to 30	12 to 30	12 to 30	12 to 30	12 to 68	14 to 70		12 to 68	14 to 70
32		16-30	16-30	16-30	16 to 20	16 to 72	18 to 74		16 to 72	18 to 74
34		16-32	16-32	16-32	16 to 20	16 to 78	18 to 80		16 to 78	18 to 80
36		16-32	16-32	16-32	16 to 20	16 to 78	18 to 80		16 to 78	18 to 80
38		16 to 34	16 to 34	16 to 34	16 to 20	16 to 86	18 to 88		16 to 86	18 to 88
40		16 to 34	16 to 34	16 to 34	16 to 20	16 to 86	18 to 88		16 to 86	18 to 88
44		16 to 38	16 to 38	16 to 38	16 to 20	16 to 93	18 to 95		16 to 93	18 to 95
48	W	16 to 38	16 to 38	16 to 38	16 to 20	-	-	-	-	-	-
50		16 to 38	16 to 38	16 to 38	16 to 20
60		16 to 38	16 to 38	16 to 38	16 to 20
72		16 to 38	16 to 38	16 to 38	16 to 20

Shaft bore diameter 9, 51 to 54 are not available for Shaft Bore Specification N.
Shaft bore diameter 8, 9, 11, 13, 14, 17, 21 to 55 are not available for Shaft Bore Specification C.
Shaft Bore Specification H (round hole), K (keyway), V / F (stepped hole), Y (both ends stepped hole), and WB (two-stepped hole) do not have tapped holes.
Flange is already installed, and set screws are included for Shaft Bores Specification P, N, TK, and C.
No surface treatment is applied to the processed part.

Keyway and Tapping Dimensions

(Unit: mm)

d Dimension 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 dimensional 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
60 to 65	18		4.4
66 to 70	20	+/- 0.0260	4.9

old JIS keyway dimensional tolerance

Nominal (C)	b_JS9		t
10 to 12	4	+0.022 +0.010	1.5	+0.1 0
15 to 20	5	+0.022 +0.010	2
30	7	+0.028 +0.013	3
33 to 40	10	+0.028 +0.013	3.5
41 to 50	12	+0.034 +0.016	3.5
55 to 60	15		5
61 to 70	18		6

Set screw size

Applicable shaft diameter (d)	Thread Size
Over 4 to 7 or less	M3 × 4
Over 7 and 12 or less	M4 × 5
Over 12 and 17 or less	M5 × 5
Over 17 and 30 or less	M6 × 8
Over 30 and 50 or less	M8 × 10
Over 50 and 90 or less	M10 × 12

[ ! ] Shaft hole diameter ⌀4, ⌀9, and ⌀71 or larger cannot be processed for new JIS key.
[ ! ] If the shaft bore specification is diameter ⌀10, the new JIS key dimension is 3, the groove dimension (b) tolerance is ±0.0125, the groove height is 1.4, the tolerance is +0.1/0, and the set screw size is M4×3.
[ ! ] Shaft hole diameters ⌀8, ⌀9, ⌀11, ⌀13, ⌀14, ⌀17, and ⌀21 or larger cannot be processed for old JIS key.
[ ! ] Machine key not included. Please prepare separately. Recommended products: >>Parallel key, >>Parallel key counterbore hole type

Alteration

Alterations	Set Screw Angle Change		No Flange Crimping	Flange crimping on one side only
Code	KC90	KC120	NFC	RFC, LFC
Spec.	Changes a set screw angle to 90°. [ ! ]For Shape A pulley, the screw holes are set at around 90° to keep away from peaks.	Changes a set screw angle to 120°. [ ! ]For Shape A pulley, the screw holes are set at around 120° to avoid peaks.	The product is shipped without swaging the flange. (Includes 2 flanges)	The product is shipped without swaging the flange on one side only. (Includes 1 flange)

Alterations

Retaining Ring Groove Alteration

Tapped Hole Dimension Change

Boss Cut

Code

SRG

TPC

Spec.

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

Usage conditions
[ ! ]Minimum Thickness: 2 mm
[ ! ]Applicable only for shaft hole specification V and F
[ ! ]Z dimension retaining ring groove standard is applied
[ ! ]n ≤ J-SRG-m

*Please refer to the table below for retaining ring groove dimensions.

Changes the tapped hole dimension.
[ ! ]Applicable to Shaft Bore Specification P/N/C only.

M	TPC
M3	M4
M4	M3/M5
M5	M4, M6
M6	M5/M8
M8	M6, M10
M10	M8

Cuts the hub length in 0.5 mm increments.

Usage conditions
[ ! ]Shaft hole specifications H, V, F: 3 ≤ BC<L-W
[ ! ]Shaft hole specifications P, N, C: M+3 ≤ BC<L-W
[ NG ]Not available for Shape A.

Alterations	Side Hole Alteration*
Alterations	Side tapped hole	Side through hole	Side counterbore hole
Code	QTC, QFC, QSC	KTC, KFC, KSC	ZTC, ZFC, ZSC
Spec.	Machines tapped hole on the side surface of hub side. Usage conditions [ ! ]Minimum Thickness Condition: min. 2 mm Shape A: d+M+4 ≤ QC ≤ E-(M+4) In case of shaft hole specification V Z+M+4 ≤ QC ≤ E-(M+4) Shape B: d+M+4 ≤ QC ≤ D-(M+4) In case of shaft hole specification V Z + M + 4 ≤ QC ≤ D - (M+4) [ ! ]When the shaft hole specification is P, N, or C QTC: Specify KC120 at the same time QFC: KC120 is not compatible at the same time QSC: Not available [ NG ]Not applicable to Shaft Bore Specification F/Y/WB.	Machines through hole on the hub side surface. Usage conditions [ ! ]Minimum Thickness Condition: min. 2 mm Shape A: d + K + 4 ≤ KC ≤ E- (K+4) In case of shaft hole specification V Z + K + 4 ≤ KC ≤ E- (K+4) Shape B: d + K + 4 ≤ KC ≤ D- (K+4) In case of shaft hole specification V Z + K + 4 ≤ KC ≤ –(K+4) [ ! ]If the shaft bore specification is P, N, or C KTC: Specify KC120 at the same time KFC: KC120 cannot be used at the same time KSC: Not available [ NG ]Not applicable to Shaft Bore Specification F/Y/WB.	Machines counterbored hole on the hub side surface. Usage conditions [ ! ]Minimum Thickness Condition: min. 2 mm Shape A: d + d2 + 4 ≤ ZC ≤ E- (d2 + 4) In case of shaft hole specification V Z + d2 + 4 ≤ ZC ≤ E- (d2 + 4) Shape B: d + d2 + 4 ≤ ZC ≤ D- (d2 + 4) In case of shaft hole specification V Z + d2 + 4 ≤ ZC ≤ D- (d2 + 4) [ ! ]If shaft bore specification P, N, or C is specified ZTC: Specify KC120 at the same time ZFC: KC120 cannot be used at the same time ZSC: Not available [ NG ]Not applicable to Shaft Bore Specification F/Y/WB.

[ ! ]*Conditions for side hole alteration may vary depending on the shaft bore specification.
[ ! ]Please use filtering criteria to confirm applicable alteration.

■ Retaining ring groove dimension

Z_H7	d₂	Tolerance	m	Tolerance	n (min.)
10	10.4	+0.11 　0	1.15	+0.14 　0	1.5
11	11.4
12	12.5
13	13.6
14	14.6
15	15.7
16	16.8
17	17.8
19	20	+0.21 　0
20	21
21	22
22	23

Z_H7	d₂	Tolerance	m	Tolerance	n (min.)
24	25.2	+0.21 　0	1.15	+0.14 　0	1.5
25	26.2
26	27.2
28	29.4
30	31.4
32	33.7
35	37		1.65		2
37	39		1.65
40	42.5	+0.25 　0	1.9
42	44.5
45	47.5
47	49.5

Z_H7	d₂	Tolerance	m	Tolerance	n (min.)
52	55	+0.3 　0	2.2	+0.14 　0	2
55	58
60	63
62	65
68	71		2.7		2.5
72	75
80	83.5	+0.35 　0

Compatible retaining ring: >> here