Plain Bore Sprockets (Stock Bore Sprocket)

Our plain bore sprocket is an indispensable component in industrial transmission systems and is widely used in fields such as mechanical manufacturing, agricultural equipment, and construction machinery. We offer high-quality machinable bore sprockets and metric bore sprockets to meet different standards and application requirements. The product classification covers the American standard ANSI series, the European standard ISO series, and the Asian standard series, ensuring a diverse range of choices for customers.

Plain Bore Sprocket

The plain bore sprocket is a type of sprocket with an unprocessed inner hole. Customers can further process it according to their actual needs to fit a specific shaft diameter. This design flexibility makes it the first choice in many industries. Our machinable bore sprockets are made of high-quality materials, featuring high wear resistance and long service life, and are suitable for various transmission systems. Furthermore, we also offer metric bore sprockets to meet the international market’s demand for standardized sizes.

Plain Bore Sprocket

Plain Bore Sprockets for Sale

To meet the demands of global customers, our stock bore sprocket product line covers three major standard series: the American standard ANSI series, the European standard ISO series and the Asian standard series. Each series undergoes strict quality control to ensure stable performance and easy installation.

Standard Bore Sprockets (Stock Bore)

American Standard ANSI Series Machinable Bore Sprockets

The American standard series of plain bore sprockets complies with the specifications of the American National Standards Institute (ANSI) and are widely used in industrial equipment in the North American market.

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No.PitchRoller ΦTooth widthTooth rangeType
No.251/4″1.30″B1=0.110″9-72A B
No.353/8″0.200″B1=0.168″8-112A B
No.35-23/8″0.200″b1=0.162″ B2=0.561″12-102B
No.35-33/8″0.200″b1=0.162″ B2=0.561″ B3=0.960″13-102B
No.411/2″0.306″B1=0.227″6-112A B
No.401/2″0.312″B1=0.284″8-112A B
No.40-21/2″0.312″b1=0.275″ B2=0.841″11-112B
No.40-31/2″0.312″b1=0.275″ B2=0.841″ B3=1.407″11-102B
No.505/8″0.400″B1=0.343″8-112A B
No.50-25/8″0.400″b1=0.332“ B2=1.045”11-112B
No.50-35/8″0.400″b1=0.332“ B2=1.045” B3=1.758”11-102B C
No.603/4″0.468″B1=0.459″8-112A B
No.60-23/4″0.468″b1=0.444“ B2=1.341”11-95B C
No.60-33/4″0.468″b1=0.444“ B2=1.341” B3=2.238”11-95B C
No.801″0.625″B1=0.575″8-112A B C
No.80-21″0.625″b1=0.575″ B2=1.710″10-95B C
No.80-31″0.625″b1=0.575″ B2=1.710″ B3=2.863″11-95B C
No.1001 1/4″0.750″B1=0.692″7-96A B C
No.100-21 1/4″0.750″b1=0.669″ B2=2.077″9-80B C
No.100-31 1/4″0.750″b1=0.669″ B2=2.077″ B3=3.485″11-80B C
No.1201 1/2″0.875″B1=0.924″8-90A B C
No.120-21 1/2″0.875″b1=0.894″ B2=2.683″11-60B C
No.1401 3/4″1.000″b1=0.924″11-80A B C
No.140-21 3/4″1.000″b1=0.894″ B2=2.818″13-60B C
No.1602″1.125″B1=1.156″8-80A B C
No.160-22″1.125″b1=1.119″ B2=3.424″13-60B C
No.1802 1/4″1.406″B1=1.301″11-60A B C
No.2002 1/2″1.562″B1=1.389″10-60A B C
No.200-22 1/2″1.562″b1=1.344″ B2=4.161″11-60B C
No.2403″1.875″B1=1.738″10-60A B C

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European Standard ISO Series Metric Bore Sprockets

The ISO series of stock bore sprockets of the European standard follow the standards of the International Organization for Standardization (ISO) and are particularly suitable for the European and global markets. Our metric bore sprockets stand out particularly in this series and can meet the requirements of high precision. The specifications are as follows:

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No.SizeTooth radius r3 (mm)Radius width C(mm)Pitch(mm)Internal width(mm)Roller Φ(mm)Tooth range
03B-15*2.5mm50.652.53.28-125
04B-16*2.8mm60.762.848-125
ASA251/4″*1/8″6.40.76.353.183.38-125
05B-1-28*3mm818358-125
06B-1-2-33/8″*7/32″1019.5255.726.358-125
081B-11/2″*1/8″13112.73.37.758-125
083B/084B-11/2″*3/16″131.312.74.887.758-125
085B-11/2″*1/4″ roller 7.75131.312.76.47.758-125
085B-11/2″*1/4″ roller 8.51131.312.76.48.518-125
08B-1-2-31/2″*5/16″131.312.77.758.518-125
10B-1-2-35/8″*3/8″161.615.8759.6510.168-125
12B-1-2-33/4″*7/16″19219.0511.6812.078-125
16B-1-2-31″*17.02mm262.525.417.0215.888-125
20B-1-2-31″1/4*3/4″323.531.7519.5519.058-114
24B-1-2-31″1/2*1″38438.125.425.48-90
28B-1-2-31″3/4*1″1/444544.4530.9927.948-76
32B-1-2-32″*1″1/451550.830.9929.218-76

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Asian Standard Series Plain Bore Sprockets

The Asian Standard series of stock bore sprockets are specially designed for the Asian market, compatible with both the Japanese JIS standard and the Chinese GB standard, and are widely used in agricultural machinery and light industrial equipment. The following are some specifications:

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No.Tooth width TPitch PInternal width WRoller DrTeeth Range
NK11SB1.63.74651.832.28512-48
NK15B24.76252.382.4811-35
NK25B2.86.353.183.310-80
NK35B4.39.5254.785.089-80
NK410B2.812.73.47.7710-40
NK40B7.212.77.957.959-90
NK50B8.715.8759.538-90
NK60B11.719.0512.711.919-90
NK80B14.625.415.8815.889-90
NK100B/NK100C17.631.7519.0519.059-75
NK120B/NK120C23.538.125.422.2310-60
NK140B/NK140C23.544.4525.2225.410-60
NK160B/NK160C29.450.831.5528.5810-35 40-60
NK180B/NK180B3357.1535.7235.7111-20 21-60
NK200B/NK200C35.363.537.8539.6811-18 19-60
NK35-2B4.19.5254.785.0810-60
NK40-2B712.77.957.9510-70
NK50-2B8.415.8759.5310.1610-70
NK60-2B11.319.0512.711.9110-70
NK80-2B14.125.415.8815.8810-70
NK100-2B/NK100-2C1731.7519.0519.0510-60
NK120-2B/NK120-2C22.738.125.422.2310-60

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Why Choose Our Stock Bore Sprockets?

Our plain bore sprocket stands out for its excellent quality and diverse choices. We are committed to providing high-performance and durable products. The following are our core advantages:

  • High-quality materials: Made of superior carbon steel and stainless steel to ensure the product’s durability and corrosion resistance.
  • Flexibility: The unprocessed inner hole design enables customers to customize according to their needs.
  • Global standard compatibility: Covering ANSI, ISO and Asian standards, meeting the requirements of different markets.
  • Strict quality control: Each product undergoes multiple tests to ensure stable performance.

Contact us

If you have any questions about our Plain Bore Sprocket, please feel free to contact us at any time. We offer professional technical support and customized services to help you find the most suitable transmission solution.