Timing Pulleys - L Type

MISUMI

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.

[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

■L type

● Pulley Shape

Tooth Profile
(ISO Standard Rack Dimensions)

Shape A

Shape B

Shape D

* H Dimension L050=5, L075=8, L100=11

[ ! ]1

[ ! ]2

Tooth groove dimensions slightly vary according to the number of teeth. (Pitch: 9.525mm)
[ ! ] For aluminum flanges, the flange thickness is 1.5.
[!] 1 t = 2.0 for 60 and 72 toothed pulleys (Machined Flange)
[ ! ] The tolerance of the tap position dimension from the boss end face and pulley end face is ±0.3.
[ ! ] 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.
[ ! ] Unless otherwise specified except for teeth and F dimensions, the dimension tolerance conforms to JIS B 0405 Class m.

● Shaft Bore Specification
Select shaft bore spec mark and each dim. from the table below.

[ ! ] Surface treatment may not be applied to the shaft bores.

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 the shaft bore dia. 10
and the keyway width 4.0 mm.

V Stepped Hole

F Stepped Hole
(Counterbored Hole on the Hub Side)

Y Both Ends Stepped Hole

WB Two-stepped hole

[ ! ] Z - d ≥ 2
[ ! ]3.0 ≤ J ≤ W－3.0

[ ! ] Applicable to Shape B only
[ ! ] Z - d ≥ 2
[ ! ]3.0 ≤ J ≤ L－3.0

[ ! ] Applicable to Shape A only
[ ! ]Q (R)－Y ≥ 2
[ ! ]S+T ≤ W－3.0
[ ! ]S (T) ≥ 3.0

[ ! ] Applicable to Shape A only
[ ! ]Q－R ≥ 2
[ ! ]R－WB ≥ 2
[ ! ]S+T ≤ W－3.0
[ ! ]S (T) ≥ 3.0

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

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

■Belt Nominal Width / Dimensions

mm	Nominal
mm	L050	L075	L100	L150
A	14	21	27	40
W	19	26	32	45
L Number of Teeth 10 to 59	31	38	44	57
L Number of Teeth 60, 72	39	46	53	57

Type	Belt Width				[M] Material		[S] Surface Treatment	[A] Accessory Set Screws
	12.7 mm (1/2 in)	19.1 mm (3/4 in)	25.4 mm (1 in)	38.1 mm (1.5 in)	Pulley	Flange ^*
	L050	L075	L100	L150	Pulley	Flange ^*
ATPA	●	●	●	●	Extra Super Duralumin Aluminum alloy	Aluminum alloy	Clear Anodize	SUS304
ATPB	●	●	●	●			Black Anodize
ATPK	●	●	●	●			Hard Clear Anodize
ATPN	●	●	●	●			Electroless nickel plating
ATPT	●	●	●	●	S45C Equivalent	SPCC	—	SCM435 (Black Oxide)
ATP	●	●	●	●			Black Oxide Coating
ATPP	●	●	●	●			Electroless nickel plating
ATPS	●	●	●	—	SUS304	SUS304	—	SUS304

[ ! ]Flange is already swaged, and set screws are included for Shaft Bores P, N and C.
* Flange is not included for Shape D.
[ ! ] Due to vibrations during transportation, the set screw may become detached from the main body.