High Torque Timing Pulleys P8M Type
Caution
- Please note that the swaged flange options, NFC, RFC, and LFC, are not reflected in the CAD data.
- For customers who are selecting timing pulley with tapped holes on the tooth surface. Depending on the shaft bore diameter selected by the customer, the accessory set screw may protrude and interfere with the belt. Please check whether the set screw protrudes from the bottom of the pulley root on the 3D preview or CAD. If it protrudes, please consider alteration SLH "Set screw length change" or changing to shape B. Thank you for choosing this product.
- 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
[Related Products]
· Timing belt High Torque Timing Belt, Super High Torque Timing Belt, Open End Belts/Polyurethane/Chloroprene Rubber
· Idler Idler with Teeth Center Bearing, Idler with Teeth Both Sides Bearing, Idler - Backside Tensioning Center Bearing, Idler - Backside Tensioning Both Sides Bearing
Dimensional Drawing
[ ! ] 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.
[ ! ] Unless otherwise specified except for teeth and F dimensions, the dimension tolerance conforms to JIS B 0405 Class m.
[ ! ] 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
| mm | Nominal | ||
| 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 |
| dH7 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 Range | Tolerance (mm) | |
| Over | or less | |
| 0.5 | 3 | ±0.1 |
| 3 | 6 | |
| 6 | 30 | ±0.2 |
| 30 | 120 | ±0.3 |
Class m (Medium Class)
■Keyway Dimensions
| Nominal(N,C) | dH7 |
| 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 |
| Nominal(N) | bJS9 | 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 | |||
| 39 to 44 | 12 | ±0.0215 | ||
| 45 to 50 | 14 | 3.8 | ||
| 55 | 16 | 4.3 | ||
| Nominal(C) | bJS9 | 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 | |||||
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 | ● | ● | ● | Electroless nickel plating | (Black Oxide) | ||
PTPS | ● | ● | - | SUS304 | SUS304 | - | SUS304 |
[ ! ] For orders with no flange crimping, please specify the alteration NFC.