Notice of End of Sales for Economy Series Pneumatic Equipment Category. More information.

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Idlers（Surface Treatment：Black Oxide）

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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Sprocket Shape	Shape A Shape B Shape C
Brand	(7) (3) IMAO CORPORATION (5) KATAYAMA CHAIN (4) KONISHI (0) NABEYA BI-TECH (1)
CAD	2D 3D
Days to Ship	All Same day 5 Day(s) or Less 6 Day(s) or Less 7 Day(s) or Less 8 Day(s) or Less Others

17 items

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: 30; 45; 60

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MiSUMi Economy

Idler Sprocket Japanese Standard Single Bearing

MiSUMi Economy

MISUMI

New at MISUMI? Get 20% Discount on your First Purchase. Click to Register Now

Volume Discount

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
-	35 ～ 80	9 ～ 25	10 ～ 20	Steel	Idlers	1	RS	Bearing Built-in, Single	Black Oxide

From: ₹ 513.00
Days to Ship: Same day or more

Same day or more

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MiSUMi Economy

Idler Sprocket With Hub Japanese Standard

MiSUMi Economy

MISUMI

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Volume Discount

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
Shape B	35 ～ 40	10 ～ 20	10 ～ 25	Steel	Idlers	1	RS	Bearing Built-in, Double	Black Oxide

From: ₹ 1,032.00
Days to Ship: 12 Day(s) or more

12 Day(s) or more

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Idler Sprockets - Single Bearing, Double Bearing

Idler Sprockets - Single Bearing, Double Bearing

MISUMI

Sprockets with built-in bearings.
See here for tension units that use this product.

Volume Discount

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
Shape C	25 ～ 80	9 ～ 25	6 ～ 20	Steel	Idlers	1	Others	Bearing Built-in, Single / Bearing Built-in, Double	Black Oxide

From: ₹ 749.00
Days to Ship: Same day or more

Same day or more

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Idler Sprocket With Boss

MISUMI

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 0

Volume Discount

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
Shape B	35 ～ 60	10 ～ 32	10 ～ 35	Steel	Idlers	1	Others	Bearing Built-in, Double	Black Oxide

From: ₹ 2,558.44
Days to Ship: 6 Day(s) or more

6 Day(s) or more

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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 0

Volume Discount

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
Shape B	2040 ～ 2060	19 ～ 25	20 ～ 30	Steel	Idlers	1	Double Pitch	Bearing Built-in, Double	Black Oxide

From: ₹ 4,376.62
Days to Ship: 6 Day(s) or more

6 Day(s) or more

Economy series

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MiSUMi Economy

Idler Sprocket European Standard Single Bearing

MiSUMi Economy

MISUMI

New at MISUMI? Get 20% Discount on your First Purchase. Click to Register Now

Volume Discount

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
-	6	25	17 ～ 20	Steel	Idlers	1	RS	Bearing Built-in, Single	Black Oxide

From: ₹ 1,227.00
Days to Ship: 12 Day(s)

12 Day(s)

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Standard Idler Sprocket, Single

KATAYAMA CHAIN

[Features]
・ The KANA standard idler sprocket retains the proper tension in the transmission of the roller chain
・ Since the tooth tips of the sprocket are hardened, it has excellent durability and provides smooth and quiet rotation.

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
Shape C	35 ～ 80	9 ～ 25	10 ～ 20	Steel	Idlers	1	RS	Bearing Built-in, Single	Black Oxide

From: ₹ 1,160.27
Days to Ship: 5 Day(s) or more

5 Day(s) or more

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Idler (SIS), Steel Sprocket

IMAO CORPORATION

[Features]·Press-fit ball bearing. [Materials]·Steel (Surface treatment: black oxide coating).

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
Shape A	35 ～ 80	9 ～ 20	10 ～ 20	Steel	Idlers	1	RS	Bearing Built-in, Single	Black Oxide

From: ₹ 1,519.67
Days to Ship: 5 Day(s) or more

5 Day(s) or more

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Idler (SIS-SW), Steel Sprocket

IMAO CORPORATION

Double bearing specification steel sprocket idler fitting chains no. 35 - 80. Ball bearings are fixed with retaining rings.

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
Shape B	35 ～ 80	12 ～ 13	10 ～ 20	Steel	Idlers	1	RS	Bearing Built-in, Double	Black Oxide

From: ₹ 2,616.45
Days to Ship: 5 Day(s) or more

5 Day(s) or more

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Standard Idler Sprocket, Double

KATAYAMA CHAIN

Maintain proper 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 sprocket, maintains proper tension in the transmission of the roller chain.
· As sprocket tooth tips are induction hardened, durability is excellent, and smooth and quiet rotation can be obtained.
· Bearings are located in the center of the sprocket

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
Shape C	35 ～ 80	9 ～ 25	10 ～ 20	Steel	Idlers	1	RS	Bearing Built-in, Double	Black Oxide

From: ₹ 1,499.73
Days to Ship: 5 Day(s) or more

5 Day(s) or more

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Idler (SIS-S), Steel Sprocket

IMAO CORPORATION

[Features]Ball bearing is fixed with a retaining ring. [Material] Steel

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
Shape B	25 ～ 80	12 ～ 19	10 ～ 20	Steel	Idlers	1	RS	Bearing Built-in, Single	Black Oxide

From: ₹ 2,369.24
Days to Ship: 5 Day(s) or more

5 Day(s) or more

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Idler (SIS-UU), Steel Sprocket (Both Seal)

IMAO CORPORATION

Contact seal type using bearings, and so can be used in dusty environments, such as with a woodworking machine.

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
Shape A	35 ～ 60	14 ～ 20	15	Steel	Idlers	1	RS	Bearing Built-in, Single	Black Oxide

From: ₹ 1,766.78
Days to Ship: 7 Day(s) or more

7 Day(s) or more

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Double Idler Sprocket, B-Type

KATAYAMA CHAIN

• B-type shape
• 2 bearings used
• Excellent load capacity product.

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
Shape B	35 ～ 80	9 ～ 25	10 ～ 20	Steel	Idlers	1	RS	Bearing Built-in, Double	Black Oxide

From: ₹ 1,474.09
Days to Ship: 5 Day(s) or more

5 Day(s) or more

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Idler Sprocket VSA, A Type

NABEYA BI-TECH

S35C, Hardened tooth tip, black oxide coating.

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
Shape C	35 ～ 80	11 ～ 17	10 ～ 20	Steel	Idlers	1	RS	Bearing Built-in, Single	Black Oxide

From: ₹ 1,679.07
Days to Ship: 5 Day(s) or more

5 Day(s) or more

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Idler, ID Adapter【2 Pieces Per Package】

KATAYAMA CHAIN

● KANA idler sprocket dedicated product
● Total internal diameter D10 unification allowable
● 2 pieces 1Set sold product.

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
-	-	-	10	Steel	-	-	-	-	Black Oxide

From: ₹ 106.48
Days to Ship: 10 Day(s) or more

10 Day(s) or more

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Small Idlers

MISUMI

MISUMI's Small Idlers are designed for precision and reliability in rotational applications. These compact components are ideal for guiding and supporting belts, chains, and conveyors, ensuring smooth operation even in confined spaces.
Is suitable for use in portions where the serrations of the current sprocket are the most likely to interfere with those of the other sprocket.
Features
Material
•Steel – S45CSurface Treatment
•Black Oxide

Volume Discount

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
Shape C	35 ～ 60	-	6 ～ 15	Steel	Idlers	1	Others	Bearing Built-in, Single	Black Oxide

From: ₹ 1,948.05
Days to Ship: 8 Day(s) or more

8 Day(s) or more

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Single-Idler (NIS-S), Steel Sprocket

IMAO CORPORATION

[Features]·Press-fit needle bearing. [Materials]·Steel (Surface treatment: black oxide coating).

CAD ：: 2D / 3D

Sprocket Shape	Nominal Number	No. of Teeth(T)	Shaft Bore Dia. D(mm)	Material	Type	No. of Tracks	Chain Type	Shaft Type	Surface Treatment
Shape B	25 ～ 80	12 ～ 20	12 ～ 25	Steel	Idlers	1	RS	Bearing Built-in, Single	Black Oxide

From: ₹ 2,709.95
Days to Ship: 5 Day(s) or more

5 Day(s) or more


Brand
Product Series
CAD
From
Days to Ship
Specifications
Sprocket Shape
Nominal Number
No. of Teeth(T)
Shaft Bore Dia. D(mm)
Material
Type
No. of Tracks
Chain Type
Shaft Type
Surface Treatment

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Brand	MISUMI MiSUMi Economy	MISUMI MiSUMi Economy	MISUMI	MISUMI	MISUMI	MISUMI MiSUMi Economy	KATAYAMA CHAIN	IMAO CORPORATION	IMAO CORPORATION	KATAYAMA CHAIN	IMAO CORPORATION	IMAO CORPORATION	KATAYAMA CHAIN	NABEYA BI-TECH	KATAYAMA CHAIN	MISUMI	IMAO CORPORATION
Product Series	Idler Sprocket Japanese Standard Single Bearing	Idler Sprocket With Hub Japanese Standard	Idler Sprockets - Single Bearing, Double Bearing	Idler Sprocket With Boss	Idler Sprocket With Boss, Double Pitch Type	Idler Sprocket European Standard Single Bearing	Standard Idler Sprocket, Single	Idler (SIS), Steel Sprocket	Idler (SIS-SW), Steel Sprocket	Standard Idler Sprocket, Double	Idler (SIS-S), Steel Sprocket	Idler (SIS-UU), Steel Sprocket (Both Seal)	Double Idler Sprocket, B-Type	Idler Sprocket VSA, A Type	Idler, ID Adapter【2 Pieces Per Package】	Small Idlers	Single-Idler (NIS-S), Steel Sprocket
CAD	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D	2D / 3D
From	₹ 513.00	₹ 1,032.00	₹ 749.00	₹ 2,558.44	₹ 4,376.62	₹ 1,227.00	₹ 1,160.27	₹ 1,519.67	₹ 2,616.45	₹ 1,499.73	₹ 2,369.24	₹ 1,766.78	₹ 1,474.09	₹ 1,679.07	₹ 212.95	₹ 1,948.05	₹ 2,709.95
Days to Ship	Same day or more	12 Day(s) or more	Same day or more	6 Day(s) or more	6 Day(s) or more	12 Day(s)	5 Day(s) or more	5 Day(s) or more	5 Day(s) or more	5 Day(s) or more	5 Day(s) or more	7 Day(s) or more	5 Day(s) or more	5 Day(s) or more	10 Day(s) or more	8 Day(s) or more	5 Day(s) or more
Specifications
Sprocket Shape	-	Shape B	Shape C	Shape B	Shape B	-	Shape C	Shape A	Shape B	Shape C	Shape B	Shape A	Shape B	Shape C	-	Shape C	Shape B
Nominal Number	35 ～ 80	35 ～ 40	25 ～ 80	35 ～ 60	2040 ～ 2060	6	35 ～ 80	35 ～ 80	35 ～ 80	35 ～ 80	25 ～ 80	35 ～ 60	35 ～ 80	35 ～ 80	-	35 ～ 60	25 ～ 80
No. of Teeth(T)	9 ～ 25	10 ～ 20	9 ～ 25	10 ～ 32	19 ～ 25	25	9 ～ 25	9 ～ 20	12 ～ 13	9 ～ 25	12 ～ 19	14 ～ 20	9 ～ 25	11 ～ 17	-	-	12 ～ 20
Shaft Bore Dia. D(mm)	10 ～ 20	10 ～ 25	6 ～ 20	10 ～ 35	20 ～ 30	17 ～ 20	10 ～ 20	10 ～ 20	10 ～ 20	10 ～ 20	10 ～ 20	15	10 ～ 20	10 ～ 20	10	6 ～ 15	12 ～ 25
Material	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel
Type	Idlers	Idlers	Idlers	Idlers	Idlers	Idlers	Idlers	Idlers	Idlers	Idlers	Idlers	Idlers	Idlers	Idlers	-	Idlers	Idlers
No. of Tracks	1	1	1	1	1	1	1	1	1	1	1	1	1	1	-	1	1
Chain Type	RS	RS	Others	Others	Double Pitch	RS	RS	RS	RS	RS	RS	RS	RS	RS	-	Others	RS
Shaft Type	Bearing Built-in, Single	Bearing Built-in, Double	Bearing Built-in, Single / Bearing Built-in, Double	Bearing Built-in, Double	Bearing Built-in, Double	Bearing Built-in, Single	Bearing Built-in, Single	Bearing Built-in, Single	Bearing Built-in, Double	Bearing Built-in, Double	Bearing Built-in, Single	Bearing Built-in, Single	Bearing Built-in, Double	Bearing Built-in, Single	-	Bearing Built-in, Single	Bearing Built-in, Single
Surface Treatment	Black Oxide	Black Oxide	Black Oxide	Black Oxide	Black Oxide	Black Oxide	Black Oxide	Black Oxide	Black Oxide	Black Oxide	Black Oxide	Black Oxide	Black Oxide	Black Oxide	Black Oxide	Black Oxide	Black Oxide

Configure

Specification/Dimensions

Nominal Number
06

25

35

40

50

60

80

2040

2050

2060
Clear

No. of Teeth(T)
9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

28

30

32
Clear

Shaft Bore Dia. D(mm)
6

8

10

12

15

17

20

25

30

35
Clear

Material
- Steel
- Stainless Steel
- Engineering Plastic
Clear

Type
- Idlers
- Idler Pins
Clear

No. of Tracks
- 1
- 2
Clear

Chain Type
- RS
- Double Pitch
- Others
Clear

Shaft Type
- Bearing Built-in, Single
- Bearing Built-in, Double
Clear

Surface Treatment
- Not Provided
- Black Oxide
- Tooth Surface Hardening
- Trivalent Chromate
Clear

Related Categories to Idlers

FAQ Idlers

Question: What is an idler, and how does it work?: Answer: An idler is a component used in various mechanical systems to maintain tension, guide, or support a belt, chain, or rope. It doesn't transmit power but helps in reducing friction and ensuring smooth motion by rotating freely. Idlers are commonly found in automotive systems, conveyor belts, and industrial machines.
Question: What are the different types of idlers?: Answer: There are several types of idlers, including:
• Roller idlers: These have cylindrical rollers that reduce friction and wear.
• Ball idlers: Similar to roller idlers but use ball bearings for even lower friction.
• Flanged idlers: These have flanges on either side to guide a belt or chain.
• Return idlers: Used in conveyor systems to return the belt or chain back to its starting point.
• Conveyor Idlers: Support the belt in conveyor systems.
• Tensioner Idlers: Help in maintaining proper tension in belts, particularly in automotive engines.
• Guide Idlers: Ensure that the belt or chain stays aligned.
• Flat Carry Idlers: Used in flat belt conveyor systems to support materials.
Question: Where are idlers commonly used?: Answer: Idlers are found in various industries, including:
• Conveyor systems: To support and guide belts or chains.
• Power transmission systems: To change the direction of rotation or reduce friction in gears.
• Material handling equipment: To move and transport materials efficiently.
Question: What is the difference between a carrying idler and a return idler?: Answer: A carrying idler supports the loaded side of a conveyor belt, while a return idler supports the empty side.
Question: What is the purpose of a self-aligning idler?: Answer: A self-aligning idler can compensate for slight misalignments in the conveyor belt or chain, reducing wear and tear.
Question: What is the difference between an idler pulley and a tensioner pulley?: Answer: An idler pulley helps guide the belt and maintains alignment, while a tensioner pulley actively applies pressure to keep the belt tight. Tensioner pulleys are spring-loaded or adjustable, whereas idler pulleys typically rotate freely without adjusting tension.
Question: What factors should I consider when choosing an idler?: Answer: When selecting an idler, consider the following:
• Material: Steel, aluminum, or plastic, depending on the load and environment.
• Size: Ensure the idler matches your system's belt or chain specifications.
• Load capacity: For conveyor systems, choose an idler capable of handling the weight of your materials.
• Speed rating: Ensure the idler can withstand the speed of your belt or chain.

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Idlers（Surface Treatment：Black Oxide）

Configure

Specification/Dimensions

Nominal Number

No. of Teeth(T)

Shaft Bore Dia. D(mm)

Material

Type

No. of Tracks

Chain Type

Shaft Type

Surface Treatment

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FAQ Idlers

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