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Idlers（Shaft Type：Bearing Built-in, Double）
An idler is a gear-shaped part that rotates as a chain moves. It is used in various machines, such as automobile engines, compressors, and power generators that transmit power using belts and chains. However, idlers themselves are idle gears that do not transmit power to gears or shafts. By using an idler, it is possible to maintain suitable transmission tension and stable movement. In addition, there are gear-shaped sprockets that transmit rotation, idler pins for fixing the idler with nuts and screws, tensioners for adjusting the slackness and friction of the chain, etc., and guide rollers for sliding doors. In particular, there are three types of sprockets: A type on a flat plate without a boss, B type with a boss on one side, and C type with a boss on both sides.
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Specification/Dimensions
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Nominal Number
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Number of Teeth(T)
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Shaft Bore Dia. d(mm)
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Material
- Steel
- Stainless Steel
- Engineering Plastic
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Type
- Idlers
- Idler Pins
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Number of Strands
- 1
- 2
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Chain Type
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Shaft Type
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Surface Treatment
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Sprocket Shape
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Until 31/03/2025
Until 31/03/2025Idler Sprockets - Single Bearing, Double Bearing
MISUMI
Idler sprockets can retain tension of a chain and, thus prevents the chain from generating vibration or noise and the sprocket part from malfunctioning in engagement.
[Specifications]
· Product Type: Bearing Incorporated Sprockets.
· An additional small type, No. 25, is offered.From: ฿ 529.07 Special Price Days to Ship: 
Same day
Same day
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You can add up to 6 items per a category to the compare list.
Until 31/03/2025
Until 31/03/2025MISUMI
The Idlers which bearings are built-in on both sides of general purpose sprockets.
[Specifications]
· Material: S45C Equivalent (Induction Hardened Teeth Tip) / SUS304 Equivalent
· Surface Treatment: Black Oxide / None
· Bearing Accuracy : JIS B1514 Class 0From: ฿ 681.23 Special Price Days to Ship:
Same day
Same day
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You can add up to 6 items per a category to the compare list.
Until 31/03/2025
Until 31/03/2025NBK
S25C to S35C, Induction hardened Tooth TipFrom: ฿ 1,184.39 Special Price Days to Ship:
Same day
Same day
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KONISHI
[Features]·2-row chain sprocket idler. [Materials]·Steel S35C (sprocket). ·Bearing steel (bearing)From: ฿ 1,782.90 Days to Ship:
3 Day(s)
3 Day(s)
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You can add up to 6 items per a category to the compare list.
Idler Sprocket With Boss, Double Pitch Type
MISUMI
The Idlers which bearings are built-in on both sides of Double Pitch Sprockets.
[Specifications]
· Material: S45C Equivalent (InductionHardened Teeth Tip)
· Surface Treatment: Black Oxide
· Bearing Accuracy: JIS B1514 Class 0From: ฿ 1,165.35 Days to Ship:
Same day
Same day
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You can add up to 6 items per a category to the compare list.
Until 31/03/2025
Until 31/03/2025Idler (SIS-SW), Steel Sprocket
IMAO CORPORATION
Double bearing specification steel sprocket idler fitting chains compatible to no. 35 to 80. Ball bearings are fixed with retaining rings.From: ฿ 1,122.11 Special Price Days to Ship:
Same day
Same day
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You can add up to 6 items per a category to the compare list.
KATAYAMA CHAIN
[Features]
· KANA standard B-type W (double) idler sprockets maintain an appropriate tension in the roller chain transmission.
· When using a B-type drive / driven sprocket, you can use the same B-type W idler for easier design.
· Also, excellent load-bearing capacity product using 2 bearings.From: ฿ 561.63 Days to Ship:
5 Day(s)
5 Day(s)
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You can add up to 6 items per a category to the compare list.
Until 31/03/2025
Until 31/03/2025Standard Idler Sprocket, Double
KATAYAMA CHAIN
Maintains appropriate tension in the transmission of the roller chain. As tooth tips are induction hardened, durability is excellent, and smooth and quiet rotation can be obtained.
[Features]
· KANA standard W (double) idler sprockets maintain proper tension in roller chain transmission.
· Induction-hardened sprocket tooth portion allows excellent durability and smooth and quiet rotation.
· Bearings are located in the center of the sprocket.From: ฿ 518.85 Special Price Days to Ship:
Same day
Same day
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| Sprocket Shape |
| Nominal Number |
| Number of Teeth(T) |
| Shaft Bore Dia. d(mm) |
| Material |
| Type |
| Number of Strands |
| Chain Type |
| Shaft Type |
| Surface Treatment |
You can add up to 6 items per a category to the compare list.  Until 31/03/2025   | You can add up to 6 items per a category to the compare list.  Until 31/03/2025 | You can add up to 6 items per a category to the compare list.  Until 31/03/2025 | You can add up to 6 items per a category to the compare list.  | You can add up to 6 items per a category to the compare list.  | You can add up to 6 items per a category to the compare list.  Until 31/03/2025 | You can add up to 6 items per a category to the compare list.  | You can add up to 6 items per a category to the compare list.  Until 31/03/2025 | |
| Brand | MISUMI | MISUMI | NBK | KONISHI | MISUMI | IMAO CORPORATION | KATAYAMA CHAIN | KATAYAMA CHAIN |
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| From | ฿ 529.07 Special Price On Sale Until 31/03/2025 | ฿ 681.23 Special Price On Sale Until 31/03/2025 | ฿ 1,184.39 Special Price On Sale Until 31/03/2025 | ฿ 1,782.90 | ฿ 1,165.35 | ฿ 1,122.11 Special Price On Sale Until 31/03/2025 | ฿ 561.63 | ฿ 518.85 Special Price On Sale Until 31/03/2025 |
| Days to Ship | Same day | Same day | Same day | 3 Day(s) | Same day | Same day | 5 Day(s) | Same day |
| Sprocket Shape | Shape C | Shape B | Shape B | Shape B | Shape B | Shape B | Shape B | Shape C |
| Nominal Number | 40 ～ 50 | 35 ～ 60 | 25 ～ 80 | 40 ～ 60 | 2040 ～ 2060 | 35 ～ 80 | 35 ～ 80 | 35 ～ 80 |
| Number of Teeth(T) | 12 ～ 19 | 10 ～ 32 | 13 ～ 23 | 12 ～ 17 | 19 ～ 25 | 12 ～ 13 | 9 ～ 25 | 9 ～ 25 |
| Shaft Bore Dia. d(mm) | 12 ～ 20 | 10 ～ 35 | 10 ～ 20 | 20 | 20 ～ 30 | 10 ～ 20 | 10 ～ 20 | 10 ～ 20 |
| Material | Steel | Steel / Stainless Steel | Steel | - | Steel | Steel | Steel | Steel |
| Type | Idlers | Idlers | Idlers | Idlers | Idlers | Idlers | Idlers | Idlers |
| Number of Strands | 1 | 1 | 1 / 2 | 2 | 1 | 1 | 1 | 1 |
| Chain Type | Others | Others | RS | RS | Double Pitch | RS | RS | RS |
| Shaft Type | Bearing Built-in, Double | Bearing Built-in, Double | Bearing Built-in, Double | Bearing Built-in, Double | Bearing Built-in, Double | Bearing Built-in, Double | Bearing Built-in, Double | Bearing Built-in, Double |
| Surface Treatment | Black Oxide | Not Provided / Black Oxide | Tooth Surface Hardening | Tooth Surface Hardening | Black Oxide | Black Oxide | Black Oxide | Black Oxide |
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Application example related to this category
Related Categories to Idlers
FAQ Idlers
- Question: What are idlers and their role in industrial machinery?
- Answer: Idlers are essential components in industrial machinery, primarily used in conveyor systems. They play a crucial role in supporting and guiding conveyor belts, ensuring smooth and efficient material transport.
- Question: How do idlers contribute to conveyor belt longevity?
- Answer: Idlers are designed to minimize friction and wear on conveyor belts, thereby extending their lifespan. By providing proper support and alignment, idlers reduce stress and strain on the belt, ultimately enhancing durability.
- Question: What materials are used in manufacturing high-quality idlers?
- Answer: High-grade materials such as hardened steel, rubber, and polyurethane are commonly utilized in the production of durable idlers. These materials offer excellent resistance to corrosion, abrasion, and impact, ensuring reliable performance even in challenging environments.
- Question: What industries benefit from using idlers?
- Answer: Various industries, including mining, agriculture, and manufacturing, benefit from the use of idlers in their conveyor systems. Whether transporting raw materials, agricultural products, or finished goods, idlers play a critical role in streamlining production processes.
- Question: How do sealed bearings enhance idler performance?
- Answer: Idlers equipped with sealed bearings require minimal maintenance and offer extended service life. Sealed bearings protect against contaminants and moisture ingress, ensuring smooth operation and reducing the need for frequent lubrication.
- Question: Can idlers be customized to fit specific machinery requirements?
- Answer: Yes, idlers are often customizable to suit specific machinery configurations and application needs. Manufacturers offer a range of sizes, designs, and load capacities to accommodate various conveyor systems and material handling tasks.
- Question: What maintenance practices ensure optimal idler performance?
- Answer: Regular inspection and cleaning of idlers are essential for maintaining optimal performance. Monitoring for signs of wear, misalignment, or damage allows for timely replacement or adjustment, preventing costly downtime and conveyor belt damage.
- Question: What are the benefits of upgrading to premium idlers?
- Answer: Upgrading to premium idlers offers numerous benefits, including enhanced durability, reduced maintenance requirements, and improved conveyor system efficiency. Investing in quality idlers ultimately translates to increased productivity and cost savings in the long run.
- Question: How do idlers contribute to workplace safety?
- Answer: Properly functioning idlers contribute to workplace safety by ensuring smooth and reliable material transport. By minimizing belt slippage, misalignment, and jams, idlers help prevent accidents and injuries associated with conveyor system malfunctions.
- Question: What factors should be considered when selecting idlers for a specific application?
- Answer: When choosing idlers for a particular application, factors such as belt width, load capacity, operating conditions, and environmental factors must be taken into account. Consulting with experienced suppliers or engineers can help ensure the selection of idlers that meet performance requirements and maximize operational efficiency.
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