Timing Pulleys - L 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.
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 iron oxide coating
[Related Products]
· Timing belt Timing Belt, Long Timing Belts-Iron Rubber, Long Timing Belts-Polyurethane, Open End Belt Iron Rubber, 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
■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
[ ! ]1
[ ! ]2
[ ! ]2
[ ! ]2
[ ! ] 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
(Shaft Bore Specs.: P, N, C)
| dH7 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 |
| mm | Nominal | |||
| 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 | |||||
| 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 not included for Shape D.