High Torque Timing Pulleys P8M Type

Brand :

MISUMI

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.

Product Description

[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 oxide

Dimensional Drawing

[ ! ]

■P8M

● Pulley Shape

Shape A

Shape B

Standard Tooth Profile

Tooth groove dimensions slightly vary according to the number of teeth.

[ ! ] For aluminum flanges, the flange thickness is 1.5.

[ ! ] 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 and set screws.
It may have a relief in the tapped hole depending on its size.

[ ! ] The tolerance of the tap position dimension from the boss end face and pulley end face is ±0.3.
[ ! ] 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.
[ ! ] For A-Shape pulley with shaft bore spec. P, N, or C, the screw holes are set at around 90° to keep away from peaks.

H　Round Hole

P　Round Hole + Tap

N　New JIS Keyway + Tap
C　Old JIS Keyway + Tap

[ ! ] 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
[ ! ] Shape A: 3 ≤ J ≤ W-3,
Shape B: 3 ≤ J ≤ L-3

[ ! ] Applicable to Shape B only
[ ! ] Z-F (d) ≥ 2
[ ! ] 3 ≤ J ≤ L-3

[ ! ] Applicable to Shape A only
[ ! ] Q-Y (d) ≥ 2
[ ! ] R-Y (d) ≥ 2
[ ! ] S+T ≤ W-3
[ ! ] S (T) ≥ 3

[ ! ] Applicable to Shape A only
[ ! ] Q-R ≥ 2
[ ! ] R-WB (d) ≥ 2
[ ! ] S+T ≤ W-3
[ ! ] S (T) ≥ 3

■Belt Nominal Width / Dimensions

mm	Nominal
mm	P8M150	P8M250	P8M400
A	16.8	27.8	42.8
W	22.0	33.0	48.0
L Number of Teeth 20 to 40	39.0	50.0	65.0
L Number of Teeth 44 to 60	44.0	55.0	70.0

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

d_H7 Shaft Bore I.D.	M (Coarse)	Accessory Set Screws
12	M4	M4 × 3
13 to 17	M5	M5 × 4
18 to 30	M6	M6 × 5
31 to 45	M8	M8 × 6
46 to 67	M10	M10 × 8

Dimension Tolerance 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 Dimensions

d dim. 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

Type	Belt Width			[ M ] Material		[ S ] Surface Treatment	[ A ] Accessory Set Screws
	15 mm	25 mm	40 mm	Pulley	Flange
	P8M150	P8M250	P8M400	Pulley	Flange
PTPA	●	●	●	Extra Super Duralumin Aluminum alloy	Aluminum alloy	Clear Anodize	SUS304
PTPB	●	●	●			Black Anodize
PTPK	●	●	●			Hard Clear Anodize
PTPN	●	●	●			Electroless nickel plating
PTPM	●	●	●	S45C Equivalent	SPCC	Black Oxide Coating	SCM435
PTPP	●	●	●	S45C Equivalent	SPCC	Electroless nickel plating	(Black Oxide)
PTPS	●	●	-	SUS304	SUS304	-	SUS304

[ ! ] Flange is already installed, and set screws are included for Shaft Bores P, N and C.
[ ! ] For orders with no flange crimping, please specify the alteration NFC.