Timing Pulleys S8M
Brand :
MISUMI
Caution
- This product [Timing Pulley] has scheduled to discontinue on 14042025. However, we will continue to sell until stock ran out.
- Download Free! >>Economy Series Catalog ver2023 (TH-EN)_Part05 CLICK here
Product Description
Timing Pulleys S8M
Timing Pulleys are an economy item, The price is cheaper than the MISUMI standard product.They offer a wide variety of sizes to choose from.
[Feature]
● Belt Width Used (mm.) : 15 and 25
● Applicable with Belt Type : S8M
● Number of Teeth : 18, 19, 22, 24 and 25
● Shaft Bore Diameter Minimum/Maximum (mm.) : 12 to 30
● Shaft Bore Specs. : New JIS keyway + Tap
● Material : Aluminum Alloy
● Surface treatment : Clear Anodized
[Application]
Timing pulleys are frequently utilized in systems that incorporate timing belts to regulate and govern the movement of the machinery.
Economy Timing Pulleys
Timing Pulleys Medium Precision Longer Lifespan
- Easy installation with chamfered shaft bore
- Reduced assembly time by 27%
- Longer timing belt life with deburring treatment
- Suitable for medium-precision conveyance
- Affordable and durable for various applications
MISUMI Standard
Cheaper Price
Product Variety
3D CAD Support
Product Overview
Usually, timing pulleys, timing idlers and timing belts are widely used to design mechanisms for transmitting rotational power generated by motors.
Driving and transmission are realized through the engagement between the teeth of timing pulleys, timing idlers and timing belts.
Driving and transmission are realized through the engagement between the teeth of timing pulleys, timing idlers and timing belts.
Dimensional Drawing
Threaded hole size table
(shaft hole specifications: P·N)
You may purchase them separately referring to the recommended fixing screw models.
(shaft hole specifications: P·N)
| dH7 Shaft Bore ID | 2-M (Coarse Thread) |
| 12 | M4×3 |
| 13~17 | M5×4 |
| 18~30 | M6×5 |
You may purchase them separately referring to the recommended fixing screw models. Material |  Surface Treatment | |
| Pulley | Flange | |
| Aluminum Alloy | Aluminum Alloy | Clear Anodized |
Specifications Overview
| Part Number |  Pulley Shape |  Shaft Hole Specifications N Bore Dia.d | P.D. | O.D. | D | F | E | ||
 Type |  Number of Teeth |  Applicable Belt | |||||||
| C－HTPA | 18 | S8M250 | B | 14 | 45.84 | 44.46 | 32 | 52 | 36 |
| 20 | S8M150 | 14·15 | 50.93 | 49.56 | 36 | 58 | 40 | ||
| S8M250 | 20 | ||||||||
| 24 | 14 | 61.12 | 59.74 | 46 | 67 | 50 | |||
| 30 | 16 | 76.39 | 75.02 | 60 | 87 | 67 | |||
| 32 | S8M400 | 25·35 | 81.49 | 80.12 | 63 | 87 | 67 | ||
Detailed specifications are available on the official website| Part Number | Pulley Shape | Shaft Hole Specifications N Bore Dia.d | P.D. | O.D. | F | E | ||
| Type | Number of Teeth | Applicable Belt | ||||||
| C－HTPA | 18 | S8M150 | A | 12·14·15·19·20 | 45.84 | 44.46 | 52 | 36 |
| S8M250 | 14·15·19·20·22·25 | |||||||
| S8M300 | 20 | |||||||
| 19 | S8M250 | 14·15·20 | 48.38 | 47.01 | 55 | 40 | ||
| 20 | S8M150 | 12·14·15 | 50.93 | 49.56 | 58 | 40 | ||
| S8M250 | 12·14·15·17·18·20 | |||||||
| S8M300 | 22 | |||||||
| 21 | 15 | 53.48 | 52.1 | 61 | 45 | |||
| 22 | S8M150 | 14·15 | 56.02 | 54.65 | 61 | 45 | ||
| S8M250 | 14·16·20 | |||||||
| S8M300 | 22 | |||||||
| 24 | S8M150 | 12·14·16 | 61.12 | 59.74 | 67 | 50 | ||
| S8M250 | 12·14·15·20·22 | |||||||
| S8M300 | 20·22 | |||||||
| S8M400 | 20·25 | |||||||
| 25 | S8M150 | 12·14·15·19 | 63.66 | 62.29 | 70 | 56 | ||
| S8M250 | 12·15·16·17·20·22·25·30 | |||||||
| S8M400 | 20·25 | |||||||
| 26 | S8M250 | 25 | 66.21 | 64.84 | 74 | 58 | ||
| S8M300 | 20 | |||||||
| 28 | S8M250 | 15·20·22·25 | 71.3 | 69.93 | 80 | 60 | ||
| S8M400 | 25 | |||||||
| 30 | S8M250 | 15·16·18·20·22·24·25·40 | 76.39 | 75.02 | 87 | 67 | ||
| S8M300 | 25·35 | |||||||
| S8M400 | 20 | |||||||
| 32 | S8M250 | 22 | 81.49 | 80.12 | 87 | 67 | ||
| S8M300 | 32 | |||||||
| 34 | S8M250 | 25 | 86.58 | 85.21 | 95 | 75 | ||
| S8M300 | 25 | |||||||
| 36 | S8M400 | 35 | 91.67 | 90.3 | 99 | 80 | ||
| 38 | S8M250 | 16 | 96.77 | 95.39 | 104 | 84 | ||
| 50 | S8M300 | 32·40 | 127.32 | 125.95 | 135 | 115 | ||
| 60 | S8M400 | 40 | 152.79 | 151.42 | 160 | 140 | ||
Detailed specifications are available on the official websitePlease visit MISUMI website for details of the models available for sale.Product Features
■Usage difference between economy series timing pulleys and MISUMI standard product / Example of customer use
■Longer Timing Belt Life
·MISUMI Economy series timing pulley, with deburring treatment at the threaded hole, is not easy to wear the timing belt, and the price is cheap while increasing the lifetime of the timing belt.
* Problems of generic products on the market
| Economy series Timing Pulleys | MISUMI Existing Products | |
| Example of Use |  |  |
| Precautions | Generally used in reciprocating and conveyance mechanisms that require medium positioning accuracy | Generally used in mechanisms that frequently rotate forwardly and reversely and have requirements on positioning accuracy and backlash. |
| Repetitive positioning accuracy (reference value) | Medium precision (±0.1) | High precision (±0.05) |
■More Convenient On-site Assembly
·MISUMI Economy series timing pulley is chamfered at the shaft bore and threaded hole for easy installation, reducing assembly time by 27% compared to the timing pulley not chamfered.
* The values above are averages of test data and may vary individually.
·MISUMI Economy series timing pulley is chamfered at the shaft bore and threaded hole for easy installation, reducing assembly time by 27% compared to the timing pulley not chamfered.
* The values above are averages of test data and may vary individually.
·MISUMI Economy series timing pulley, with deburring treatment at the threaded hole, is not easy to wear the timing belt, and the price is cheap while increasing the lifetime of the timing belt.
 | Belt condition after the test of timing belt pulley without chamfer on the threaded hole: there are obvious wear marks left by the pulley tooth threaded hole on the belt tooth surface.  | [Test conditions] Belt series: S5M Belt width: 150mm Number of teeth of drive side pulley: 20 Number of teeth of driven side pulley: 60 Speed: 3000 rpm Tension (N): 160N Test time: 24 H |
Example of Use
■Mechanism name
Workpiece Reversal Transfer Mechanism
■ Mechanism function
The workpiece moving on the conveyor belt rotates 90 degrees and then transfers to the next process.
At this time, the clamping mechanism rotates 180 degrees and does not change the direction of the workpiece relative to the conveying direction at the same time during transfer.
■Role of the timing pulley
The transmission of the timing pulley and the timing belt changes the placement direction of the workpiece while transferring the workpiece. (Applicable to S specification and GT specification timing pulleys)
For details, please click Workpiece Reversal Transfer Mechanism.
Workpiece Reversal Transfer Mechanism
■ Mechanism function
The workpiece moving on the conveyor belt rotates 90 degrees and then transfers to the next process.
At this time, the clamping mechanism rotates 180 degrees and does not change the direction of the workpiece relative to the conveying direction at the same time during transfer.
■Role of the timing pulley
The transmission of the timing pulley and the timing belt changes the placement direction of the workpiece while transferring the workpiece. (Applicable to S specification and GT specification timing pulleys)
For details, please click Workpiece Reversal Transfer Mechanism.
Usage Method
| Usage Method Example Drawing | Usage Method of Timing Wheel and Timing Belt |
 | ①Driving The driven wheel is driven by the driving wheel for transmission |
 | ②Linear driving Reciprocating motion is carried out through the self-end timing toothed belt. |
| Usage Method Example Drawing | Usage Method of Timing Wheel and Timing Belt |
 | ③Conveyance Plates are conveyed by two timing toothed belts |
 | ④Traction transmission Workpieces are clamped and transmitted by the belt |
Timing Pulleys S8M, suitable for MISUMI Standard Timing Belts and Economy Series Timing Belts.Precautions
There may be no surface treatment in the shaft hole.The positions of keyway and tooth are not fixed.Application Industries
| Semiconductor | Automotive | Smart Phones | ||
 |  |  | ||
| Medical | Electronic & Electrical | Robotics | ||
 |  |  |
Related Products
| Flat-belt idlers, Width (T), 6 to 32 mm | Flat Belts For General Use | High Torque Timing Pulleys S2M Type | ||
 |  |  | ||
| Representative model: HBG15-6 | Representative model: HBLT350-4.23 | Representative model: HTPA48S2M040-B-N10 | ||
| Advantages: short delivery time, multiple types | Advantage: custom size | Advantages: short delivery time, multiple types |
Related Documents
Technical Data of Timing Toothed Belts, Timing Pulleys and Idlers
①Data on the selection of timing pulleys and timing toothed belts, tensioning force, etc. (drive).
②Data on the selection of timing pulleys and timing toothed belts, tensioning force, etc. (transmission & conveyance).
③Main causes and countermeasures for the damage, breakage, abnormal noise of timing toothed belts.
④Reference data on the replacement time of timing toothed belts.
⑤Data on dimensional tolerance of timing pulleys and timing idlers.
①Data on the selection of timing pulleys and timing toothed belts, tensioning force, etc. (drive).
②Data on the selection of timing pulleys and timing toothed belts, tensioning force, etc. (transmission & conveyance).
③Main causes and countermeasures for the damage, breakage, abnormal noise of timing toothed belts.
④Reference data on the replacement time of timing toothed belts.
⑤Data on dimensional tolerance of timing pulleys and timing idlers.