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Sprockets Nominal No.20B (C-SPB20B12-S-20)
- Volume Discount
MiSUMi Economy
Economy series B series sprockets should not be matched with A series chains. Please note that some yellow anti-rust oil may be adhered on the surface of the delivered sprocket, which does not affect the use and can be cleaned by yourself.
- RoHS
Part Number
Configured Part Number is shown.
C-SPB20B12-S-20
Product Overview
■ Sprocket is a solid or spoked gear that engages with a roller chain to transfer motion or power.Application of sprocket: It is widely used in mechanical transmission in chemical industry, textile machinery, food processing, instrumentation, and petroleum industries.
■Only sprockets and chains with the same specifications can be used in combination.
This series is ANSI 20B sprocket, and can be used in combination with our 20B series chain.
■ Do not use it with ISO/ANSI 20 A series chain, which may cause the chain sprocket mechanism to fail to function properly!
The surface of the delivered sprocket may have yellow anti-rust oil attached. This does not affect usage and can be cleaned off if desired. Please take note.
■ Due to process reasons, it is impossible to guarantee the coincidence of the tooth tops of multiple sprockets. If you need to use the tooth tops in an overlapping manner, please contact us.
Dimensional Drawing
External Dimensions (Unit: mm)
Sprockets processed by shaft hole and keyway. *This product is B series European Standard sprocket, and can not be used in combination with American Standard 20 A series sprocket.
■ A single package label may not match the ordered model. It is a factory-managed model. Please note that the outer package label shall prevail!
■ The engraving of sprocket body may be different from the ordered model, please check the engraving number.
Sprockets processed by shaft hole and keyway. *This product is B series European Standard sprocket, and can not be used in combination with American Standard 20 A series sprocket.
■ A single package label may not match the ordered model. It is a factory-managed model. Please note that the outer package label shall prevail!
■ The engraving of sprocket body may be different from the ordered model, please check the engraving number.
Material Specifications
 Material |  Surface Treatment |  Accessories |
| Equivalent to S45C (Induction Hardened Teeth Tip) | － | Fixing Screw (Only Shaft Hole Specifications N) |
*This series is 20B European Standard sprocket, and can not be used in combination with American Standard 20 A series sprocket.
Specification Overview
Specification Table
| Part Number |  Hole Specifications |  Shaft Bore Diameter (D) | Dp | DO | H | L | |||||||||
 Type |  Nominalmodel |  Hubtype |  Number of Teeth(T) | S Specification (H8) | N Specifications (H7) | ||||||||||
| C-SPB | 20 | B | 10 | S N | 20 | 25 | 30 | 102.74 | 117 | 70 | 40 | ||||
| 11 | 25 | 30 | 112.68 | 127 | 77 | 45 | |||||||||
| 12 | 30 | 35 | 122.68 | 137 | 88 | ||||||||||
| 13 | 30 | 35 | 40 | 132.65 | 147.5 | 98 | |||||||||
| 14 | 35 | 40 | 45 | 50 | 142.68 | 157.6 | 108 | ||||||||
| 15 | 40 | 45 | 50 | 152.72 | 167.7 | 118 | |||||||||
| 16 | 40 | 45 | 50 | 162.75 | 177.7 | 120 | 50 | ||||||||
| 17 | 25 | 45 | 50 | 172.78 | 187.8 | ||||||||||
| 18 | 45 | 50 | 182.85 | 197.8 | |||||||||||
| 19 | 45 | 50 | 192.91 | 207.9 | |||||||||||
| 20 | 45 | 50 | 202.98 | 217.9 | |||||||||||
■ Shaft Hole Machining Size Table
| Shaft Hole Diameter D | Keyway b2 × t2 | Fixing Screw M |
| 25 to 30 | 8 × 3.3 | 8 |
| 32 to 38 | 10 × 3.3 | 8 |
| 40·42 | 12 × 3.3 | 8 |
| 45·50 | 14 × 3.8 | 10 |
Product Features
■Sprocket chain drive has the following features compared with gear drive and belt drive:
1. Multi-tooth load bearing, safe and reliable;
2. Flexible transmission, absorbing shock and vibration;
3. Large center distance range, low manufacturing and installation accuracy requirements;
4. Compared with belt drive, the transmission ratio is accurate and the transmission efficiency is higher, suitable for high temperature, dusty and humid environments.
■ Sprocket, chain selection
Misumi’s sprocket and chain product selection supports the principle of “Nominal Numbering”
1. Multi-tooth load bearing, safe and reliable;
2. Flexible transmission, absorbing shock and vibration;
3. Large center distance range, low manufacturing and installation accuracy requirements;
4. Compared with belt drive, the transmission ratio is accurate and the transmission efficiency is higher, suitable for high temperature, dusty and humid environments.
■ Sprocket, chain selection
Misumi’s sprocket and chain product selection supports the principle of “Nominal Numbering”
Usage Method
Precautions
■ Sprocket maintenance
1. Sprocket tightness should be suitable. If it is too tight, it will increase power consumption, and bearing is easy to wear; if it is too loose, the sprocket is easy to beat and fall off the chain.
The degree of tightness of the sprocket is: if lifted up or pressed down from the middle of the sprocket, the center distance between the two sprocket is about 2%-3%.
2. The sprocket shall be installed on shaft without swing and skew.
The end faces of the two sprockets in the same transmission assembly should be in the same plane. When the center distance of the sprocket is less than 0.5 meters, the deviation can be 1 mm;
When the center distance of the sprocket is more than 0.5 meters, the deviation can be 2 mm. But there shall be no friction on sprocket tooth side. Integral offset.
If the offset is too large, chain is prone to fall off and wear is likely to accelerate. When replacing the sprocket, be sure to check and adjust the offset
3. After the sprocket is severely worn, the new sprocket and the new chain should be replaced at the same time to ensure good meshing.
You cannot replace new sprockets separately. Otherwise, it will cause bad engagement and accelerate the wear of new sprockets.
If the tooth surface of the sprocket is worn to a certain degree, it should be turned over in time (the sprocket used with adjustable surface) to extend the life time.
4. If the new sprocket is too long or elongated after use, and difficult to adjust, you can remove the link, but the number of the links must be even.
The link should pass through the back of the sprocket with the lock piece being inserted outside, and the opening of the lock piece should be in the opposite direction of the turning.
5. Lubricating oil should be timely filled when sprockets are working. Lubricating oil must enter the matching clearance between the roller and the inner sleeve to improve working conditions and reduce wear.
6. The old sprocket cannot be mixed with part of the new sprocket, and should be replaced as a complete set, otherwise it is easy to produce impact in the transmission. Separate replacement of sprockets will increase wear.
1. Sprocket tightness should be suitable. If it is too tight, it will increase power consumption, and bearing is easy to wear; if it is too loose, the sprocket is easy to beat and fall off the chain.
The degree of tightness of the sprocket is: if lifted up or pressed down from the middle of the sprocket, the center distance between the two sprocket is about 2%-3%.
2. The sprocket shall be installed on shaft without swing and skew.
The end faces of the two sprockets in the same transmission assembly should be in the same plane. When the center distance of the sprocket is less than 0.5 meters, the deviation can be 1 mm;
When the center distance of the sprocket is more than 0.5 meters, the deviation can be 2 mm. But there shall be no friction on sprocket tooth side. Integral offset.
If the offset is too large, chain is prone to fall off and wear is likely to accelerate. When replacing the sprocket, be sure to check and adjust the offset
3. After the sprocket is severely worn, the new sprocket and the new chain should be replaced at the same time to ensure good meshing.
You cannot replace new sprockets separately. Otherwise, it will cause bad engagement and accelerate the wear of new sprockets.
If the tooth surface of the sprocket is worn to a certain degree, it should be turned over in time (the sprocket used with adjustable surface) to extend the life time.
4. If the new sprocket is too long or elongated after use, and difficult to adjust, you can remove the link, but the number of the links must be even.
The link should pass through the back of the sprocket with the lock piece being inserted outside, and the opening of the lock piece should be in the opposite direction of the turning.
5. Lubricating oil should be timely filled when sprockets are working. Lubricating oil must enter the matching clearance between the roller and the inner sleeve to improve working conditions and reduce wear.
6. The old sprocket cannot be mixed with part of the new sprocket, and should be replaced as a complete set, otherwise it is easy to produce impact in the transmission. Separate replacement of sprockets will increase wear.
Example of Use
Part Number
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| Part Number |
|---|
| C-SPB20B12-S-20 |
| Part Number | Standard Unit Price | Minimum order quantity | Volume Discount | Days to Ship | Number of Teeth (T) | Shaft Bore Dia. d (mm) | Type | Shaft Type | Bore Specification |
|---|---|---|---|---|---|---|---|---|---|
MYR 103.52 | 2 Piece(s) | Available | 15 Day(s) | 12 | 20 | Pilot Bore Type | Standard Pilot Bore | S (Through Hole) |
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Basic Information
| Sprocket Shape | Shape B | Nominal Number | 20 | Number of Strands | 1 |
|---|---|---|---|---|---|
| Material | S45C | Surface Treatment | Not Provided |
Please check the type/dimensions/specifications of the part C-SPB20B12-S-20 in the Sprockets Nominal No.20B series.
Specification/Dimensions
-
type
- C-SPB20B
-
Number of Teeth(T)
-
Shaft Bore Dia. d(mm)
-
Type
- Pilot Bore Type
- Shaft Bore Machined Type
-
Shaft Type
- Standard Pilot Bore
- Shaft Bore Machining Configurable
-
Bore Specification
- N (New JIS Key + Threaded Hole)
- S (Through Hole)
-
CAD
- 2D
- 3D
Days to Ship
-
- All
- 15 Day(s) or Less
- 16 Day(s) or Less
Specify Alterations
- The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .
Frequently asked question (FAQ)
- Question: I bought MISUMI chains, but why can't I use them on my original sprocket?
- Answer: Please confirm the specifications of the original sprocket and chain. Specification series number may not match. In addition, there are two specifications: A series and B series in China. The two specifications of sprocket chain are not universal.
- Question: Does the sprocket need routine maintenance after installation and use?
- Answer: The chain needs regular maintenance after installation and use. These include daily lubricant application, confirmation of chain slack. After the sprocket is severely worn, the new sprocket and the new chain should be replaced at the same time to ensure good meshing.
- Question: I need to use two overlapped sprockets, I want the tooth top direction to be consistent, is it possible?
- Answer: Due to process reasons, it is impossible to guarantee the overlapping of the tooth tops of several sprockets. If the tooth tops are required to be overlapped, please contact our company or indicate on the order (the tooth tops need to be overlapped)
- Question: The engraving on the sprocket does not match the packaged model, is it shipped wrongly?
- Answer: The product model is subject to the label on the shipping bag and the actual size. The engraving is only the factory management number of the sprocket product during processing, and is not directly associated with the product model.
Products like this...
| Part Number |
|---|
| C-SPB20B11-N-30 |
| C-SPB20B12-N-30 |
| C-SPB20B12-N-35 |
| C-SPB20B13-N-30 |
| C-SPB20B13-N-35 |
| C-SPB20B13-N-40 |
| Part Number | Standard Unit Price | Minimum order quantity | Volume Discount | Days to Ship | Number of Teeth (T) | Shaft Bore Dia. d (mm) | Type | Shaft Type | Bore Specification |
|---|---|---|---|---|---|---|---|---|---|
MYR 148.16 | 1 Piece(s) | Available | 15 Day(s) | 11 | 30 | Shaft Bore Machined Type | Shaft Bore Machining Configurable | N (New JIS Key + Threaded Hole) | |
MYR 177.66 | 1 Piece(s) | Available | 15 Day(s) | 12 | 30 | Shaft Bore Machined Type | Shaft Bore Machining Configurable | N (New JIS Key + Threaded Hole) | |
MYR 177.66 | 1 Piece(s) | Available | 15 Day(s) | 12 | 35 | Shaft Bore Machined Type | Shaft Bore Machining Configurable | N (New JIS Key + Threaded Hole) | |
MYR 204.60 | 1 Piece(s) | Available | 15 Day(s) | 13 | 30 | Shaft Bore Machined Type | Shaft Bore Machining Configurable | N (New JIS Key + Threaded Hole) | |
MYR 204.60 | 1 Piece(s) | Available | 15 Day(s) | 13 | 35 | Shaft Bore Machined Type | Shaft Bore Machining Configurable | N (New JIS Key + Threaded Hole) | |
MYR 204.60 | 1 Piece(s) | Available | 15 Day(s) | 13 | 40 | Shaft Bore Machined Type | Shaft Bore Machining Configurable | N (New JIS Key + Threaded Hole) |
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