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40 Roller Chain SprocketType Bwith 3 4
19th Jul 2026, 05:07 PM

#40 Roller Chain Sprocket,Type B,with 3 /4 inch Bore Diameter and 21 Tooth,Made of AISI 1045 Medium Carbon Steel、Rust-Resistant、Hardened Teeth、Precision CNC Machined

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Lowest in last 10 months
$26.99

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Highest: $26.99
Average: $26.99
Lowest: $26.99

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Based our analysis and observation, there is very negligible chances of price to increase or decrease, more likely ro remain constant based on our price historical data.*

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You can check the price history of #40 Roller Chain Sprocket,Type B,with 3 /4 inch Bore Diameter and 21 Tooth,Made of AISI 1045 Medium Carbon Steel、Rust-Resistant、Hardened Teeth、Precision CNC Machined here. This product's current Price in USA is $26.99. The average and highest prices are $26.99 and $26.99 respectively.

Lowest Ever Price $26.99
25th Aug 2025
Average Price $26.99
Based on 330 days price tracking
Highest Price $26.99
25th Aug 2025

Price History of All Variants of 40 Roller Chain SprocketType Bwith 3 4...

40 Roller Chain Sprocket 30 Tooth 134
Offer Price: $39.99

#40 Roller Chain Sprocket 30 Tooth 1" Bore (1/4" Keyway) Black Oxide Rust-Proof with 3 Set Screws & Keyway for Mini Bike Go-Kart Tractor Heavy Duty, Hardened 1045 Steel 40BS30-1

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40 Roller Chain SprocketType Bwith 3434 Bore
Offer Price: $14.99

#40 Roller Chain Sprocket,Type B,with 3/4" Bore Diameter and 11 Tooth,Made of AISI 1045 Medium Carbon Steel、Rust-Resistant、Hardened Teeth、Precision CNC Machined

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40 Roller Chain Sprocket 11 Tooth 1234
Offer Price: $14.99

#40 Roller Chain Sprocket 11 Tooth 1/2" Bore (3/16" Keyway) Black Oxide Rust-Proof with 3 Set Screws for Mini Bike Go-Kart Clutch Faster Acceleration, Hardened 1045 Steel 40BS11-1/2

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40 Roller Chain Sprocket 24 Tooth 134
Offer Price: $29.99

#40 Roller Chain Sprocket 24 Tooth 1" Bore (1/4" Keyway) Black Oxide Rust-Proof with 3 Set Screws for Mini Bike Go-Kart Balanced Speed & Torque, Hardened 1045 Steel 40BS24-1

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40 Roller Chain SprocketType Bwith 1234 Bore
Offer Price: $18.99

#40 Roller Chain Sprocket,Type B,with 1/2" Bore Diameter and 13 Teeth,Made of AISI 1045 Medium Carbon Steel、Rust-Resistant、Hardened Teeth、Precision CNC Machined

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40 Roller Chain Sprocket 30 Tooth 3434
Offer Price: $35.00

#40 Roller Chain Sprocket 30 Tooth 3/4" Bore (3/16" Keyway) Black Oxide Rust-Proof with 3 Set Screws & Keyway for Mini Bike Go-Kart Hill Climbing Off-Road Heavy Duty, Hardened 1045 Steel 40BS30-3/4

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40 Roller Chain Sprocket 25 Tooth 3434
Offer Price: $32.00

#40 Roller Chain Sprocket 25 Tooth 3/4" Bore 3/16" Keyway Black Oxide Rust-Proof &2 Set Screws & Key Included for Mini Bike Go-Kart Balanced Performance,Industrial Drive,Hardened 1045 Steel 40BS25-3/4

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40 Roller Chain SprocketType Bwith 134 Bore
Offer Price: $26.99

#40 Roller Chain Sprocket,Type B,with 1" Bore Diameter and 21 Tooth,Made of AISI 1045 Medium Carbon Steel、Rust-Resistant、Hardened Teeth、Precision CNC Machined

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40 Roller Chain Sprocket 10 Tooth 1234
Offer Price: $13.99

#40 Roller Chain Sprocket 10 Tooth 1/2" Bore (3/16" Keyway) Black Oxide Rust-Proof with 3 Set Screws & Keyway for Mini Bike Go-Kart Clutch Performance Upgrade, Hardened 1045 Steel 40BS10-1/2

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40 Roller Chain SprocketType Bwith 5834 Bore
Offer Price: $13.99

#40 Roller Chain Sprocket,Type B,with 5/8" Bore Diameter and 9 Tooth,Made of AISI 1045 Medium Carbon Steel、Rust-Resistant、Hardened Teeth、Precision CNC Machined

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40 Roller Chain Sprocket 25 Tooth 5834
Offer Price: $32.00

#40 Roller Chain Sprocket 25 Tooth 5/8" Bore 3/16" Keyway Black Oxide Rust-Proof with 2 Set Screws & Key Included for Mini Bike Go-Kart Balanced Performance, Hardened 1045 Steel 40BS25-5/8

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40 Roller Chain Sprocket 11 Tooth 5834
Offer Price: $14.99

#40 Roller Chain Sprocket 11 Tooth 5/8" Bore (3/16" Keyway) Black Oxide Rust-Proof with 3 Set Screws & Keyway for Mini Bike Go-Kart Clutch, Hardened 1045 Steel 40BS11-5/8

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40 Roller Chain Sprocket 15 Tooth 3434
Offer Price: $20.99

#40 Roller Chain Sprocket 15 Tooth 3/4" Bore (3/16" Keyway) Black Oxide Rust-Proof with 3 Set Screws & Keyway for Mini Bike Go-Kart High Speed Racing, Hardened 1045 Steel 40BS15-3/4

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40 Roller Chain Sprocket 30 Tooth 5834
Offer Price: $39.99

#40 Roller Chain Sprocket 30 Tooth 5/8" Bore (3/16" Keyway) Black Oxide Rust-Proof with 3 Set Screws for Go-Kart Mini Bike ATV Conveyor Tractor, Hardened 1045 Steel 40BS30-5/8

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40 Roller Chain Sprocket 12 Tooth 1234
Offer Price: $15.99

#40 Roller Chain Sprocket 12 Tooth 1/2" Bore (3/16" Keyway) Black Oxide Rust-Proof with 3 Set Screws & Keyway for Mini Bike Go-Kart Clutch Performance Upgrade, Hardened 1045 Steel 40BS12-1/2

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40 Roller Chain Sprocket 24 Tooth 134
Offer Price: $29.99

#40 Roller Chain Sprocket 24 Tooth 1" Bore (1/4" Keyway) Black Oxide Rust-Proof with 3 Set Screws for Mini Bike Go-Kart Balanced Speed & Torque, Hardened 1045 Steel 40BS24-1

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40 Roller Chain Sprocket 15 Tooth 134
Offer Price: $20.99

#40 Roller Chain Sprocket 15 Tooth 1" Bore (1/4" Keyway) Black Oxide Rust-Proof with 3 Set Screws & Keyway for Mini Bike Go-Kart High Speed Racing Performance, Hardened 1045 Steel 40BS15-1

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40 Roller Chain Sprocket 25 Tooth 134
Offer Price: $32.00

#40 Roller Chain Sprocket 25 Tooth 1" Bore 1/4" Keyway Black Oxide Rust-Proof with 2 Set Screws & Key Included for Mini Bike Go-Kart Balanced Performance,Industrial Drive, Hardened 1045 Steel 40BS25-1

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40 Roller Chain Sprocket 10 Tooth 5834
Offer Price: $13.99

#40 Roller Chain Sprocket 10 Tooth 5/8" Bore (3/16" Keyway) Black Oxide Rust-Proof with 3 Set Screws & Keyway for Mini Bike Go-Kart Clutch, Hardened 1045 Steel 40BS10-5/8

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40 Roller Chain Sprocket 10 Tooth 3434
Offer Price: $13.99

#40 Roller Chain Sprocket 10 Tooth 3/4" Bore (3/16" Keyway) Black Oxide Rust-Proof with 3 Set Screws & Keyway for Mini Bike Go-Kart Clutch Performance Upgrade, Hardened 1045 Steel 40BS10-3/4

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40 Roller Chain Sprocket 12 Tooth 3434
Offer Price: $15.99

#40 Roller Chain Sprocket 12 Tooth 3/4" Bore (3/16" Keyway) Black Oxide Rust-Proof with 3 Set Screws & Keyway for Mini Bike Go-Kart Clutch, Hardened 1045 Steel 40BS12-3/4

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40 Roller Chain Sprocket 24 Tooth 3434
Offer Price: $29.99

#40 Roller Chain Sprocket 24 Tooth 3/4" Bore (3/16" Keyway) Black Oxide Rust-Proof with 3 Set Screws & Keyway for Mini Bike Go-Kart ATV Tractor, Hardened 1045 Steel 40BS24-3/4

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40 Roller Chain Sprocket 15 Tooth 5834
Offer Price: $20.99

#40 Roller Chain Sprocket 15 Tooth 5/8" Bore (3/16" Keyway) Black Oxide Rust-Proof with 3 Set Screws & Keyway for Mini Bike Go-Kart High Speed Racing Performance, Hardened 1045 Steel 40BS15-5/8

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40 Roller Chain SprocketType Bwith 3434 Bore
Offer Price: $26.99

#40 Roller Chain Sprocket,Type B,with 3/4" Bore Diameter and 21 Tooth,Made of AISI 1045 Medium Carbon Steel、Rust-Resistant、Hardened Teeth、Precision CNC Machined

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40 Roller Chain Sprocket 24 Tooth 5834
Offer Price: $29.99

#40 Roller Chain Sprocket 24 Tooth 5/8" Bore (3/16" Keyway) Black Oxide Rust-Proof with 3 Set Screws for Go-Kart Mini Bike ATV Conveyor, Farm Equipment Industrial Drive,Hardened 1045 Steel 40BS24-5/8

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40 Roller Chain Sprocket 12 Tooth 5834
Offer Price: $15.99

#40 Roller Chain Sprocket 12 Tooth 5/8" Bore (3/16" Keyway) Black Oxide Rust-Proof with 3 Set Screws & Keyway for Mini Bike Go-Kart ATV, Hardened 1045 Steel 40BS12-5/8

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40 Roller Chain Sprocket 36 Tooth 5834
Offer Price: $49.99

#40 Roller Chain Sprocket 36 Tooth 5/8" Bore (3/16" Keyway) Black Oxide Rust-Proof with 3 Set Screws & Keyway for Mini Bike Go-Kart Hill Climbing Trail Off-Road, Hardened 1045 Steel 40BS36-5/8

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40 Roller Chain Sprocket 36 Tooth 134
Offer Price: $49.99

#40 Roller Chain Sprocket 36 Tooth 1" Bore (1/4" Keyway) Black Oxide Rust-Proof with 3 Set Screws for Go-Kart Mini Bike ATV Tractor Conveyor, Hardened 1045 Steel 40BS36-1

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40 Roller Chain Sprocket 40 Tooth 134
Offer Price: $55.99

#40 Roller Chain Sprocket 40 Tooth 1" Bore (1/4" Keyway) Black Oxide Rust-Proof with 3 Set Screws for Go-Kart Mini Bike ATV Tractor Conveyor, Hardened 1045 Steel 40BS40-1

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40 Roller Chain SprocketType Bwith 1234 Bore
Offer Price: $13.99

#40 Roller Chain Sprocket,Type B,with 1/2" Bore Diameter and 9 Tooth,Made of AISI 1045 Medium Carbon Steel、Rust-Resistant、Hardened Teeth、Precision CNC Machined

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40 Roller Chain Sprocket 36 Tooth 3434
Offer Price: $49.99

#40 Roller Chain Sprocket 36 Tooth 3/4" Bore (3/16" Keyway) Black Oxide Rust-Proof with 2 Set Screws & Key Included for Mini Bike Go-Kart Hill Climbing Torque,Hardened 1045 Steel 40BS36-3/4

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40 Roller Chain Sprocket 18 Tooth 134
Offer Price: $20.00

#40 Roller Chain Sprocket 18 Tooth 1" Bore (1/4" Keyway) Black Oxide Rust-Proof with 2 Set Screws & Key Included for Mini Bike Go-Kart Balanced Performance, Hardened 1045 Steel 40BS18-1

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40 Roller Chain Sprocket 50 Tooth 134
Offer Price: $60.00

#40 Roller Chain Sprocket 50 Tooth 1" Bore (1/4" Keyway) Black Oxide Rust-Proof with 2 Set Screws & Key Included for Mini Bike Go-Kart Extreme Torque Hill Climb, Hardened 1045 Steel 40BS50-1

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40BS18-34 Roller Chain Sprocket with 3434 Bore
Offer Price: $20.00

40BS18-3/4 Roller Chain Sprocket with 3/4" Bore 18 Tooth, Black Oxide Finish, Includes 2 Set Screws and 1 Key, Heavy Duty Drive Sprocket for #40 Chain

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40BS20-34 Roller Chain Sprocket with 3434 Bore
Offer Price: $22.00

40BS20-3/4 Roller Chain Sprocket with 3/4" Bore 20 Tooth, Black Oxide Finish, Includes 2 Set Screws and 1 Key, Heavy Duty Drive Sprocket for #40 Chain

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40BS18-58 Roller Chain Sprocket with 5834 Bore
Offer Price: $20.00

40BS18-5/8 Roller Chain Sprocket with 5/8" Bore 18 Tooth, Black Oxide Finish, Includes 2 Set Screws and 1 Key, Heavy Duty Drive Sprocket for #40 Chain

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40BS20-58 Roller Chain Sprocket with 5834 Bore
Offer Price: $22.00

40BS20-5/8 Roller Chain Sprocket with 5/8" Bore 20 Tooth, Black Oxide Finish, Includes 2 Set Screws and 1 Key, Heavy Duty Drive Sprocket for #40 Chain

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40BS20-1 Roller Chain Sprocket with 134 Bore
Offer Price: $22.00

40BS20-1 Roller Chain Sprocket with 1" Bore 20 Tooth, Black Oxide Finish, Includes 2 Set Screws and 1 Key, Heavy Duty Drive Sprocket for #40 Chain

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Current Price in USA

Price $26.99

Product Information

Details

Product Name #40 Roller Chain Sprocket,Type B,with 3 /4 inch Bore Diameter and 21 Tooth,Made of AISI 1045 Medium Carbon Steel、Rust-Resistant、Hardened Teeth、Precision CNC Machined
Store Product Code B0FN4R61LH
Store Name amazon.com
Rating 9 / 10
Category Roller Chain Sprockets
Product Manufacturer Aoxing Trading Co., Ltd
Dimensions 3.58 x 3.58 x 1 inches

Features

  • Precision-Machined Bore for Seamless Fit: 21 tooth with 3/4" bore diameter and 3/16" x 3/32" keyway. Ultra-precise dimensions ensure perfect integration with matching components for smooth power transmission.
  • Premium AISI 1045 Steel with Hardened Teeth: High-temperature quenched for exceptional wear resistance and durability in demanding applications.
  • ANSI Standard: This 40BS21 sprocket comes with a 3/4'' precision-machined hole, featuring a keyway and three set screws. Its teeth are hardened to enhance durability. This sprocket fully complies with all ANSI standards.
  • Black Oxide Coating for Corrosion Resistance: All-over rust-proof finish extends service life, even in harsh environments.
  • Low-Maintenance Versatility: Requires only lubrication for easy upkeep. Ideal for industrial equipment, conveyors, agricultural machinery, and DIY projects.

Images

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Image of #40 Roller Chain Sprocket,Type B,with 3 /4 inch Bore Diameter and 21 Tooth,Made of AISI 1045 Medium Carbon Steel、Rust-Resistant、Hardened Teeth、Precision CNC Machined
Image of #40 Roller Chain Sprocket,Type B,with 3 /4 inch Bore Diameter and 21 Tooth,Made of AISI 1045 Medium Carbon Steel、Rust-Resistant、Hardened Teeth、Precision CNC Machined
Image of #40 Roller Chain Sprocket,Type B,with 3 /4 inch Bore Diameter and 21 Tooth,Made of AISI 1045 Medium Carbon Steel、Rust-Resistant、Hardened Teeth、Precision CNC Machined
Image of #40 Roller Chain Sprocket,Type B,with 3 /4 inch Bore Diameter and 21 Tooth,Made of AISI 1045 Medium Carbon Steel、Rust-Resistant、Hardened Teeth、Precision CNC Machined
Image of #40 Roller Chain Sprocket,Type B,with 3 /4 inch Bore Diameter and 21 Tooth,Made of AISI 1045 Medium Carbon Steel、Rust-Resistant、Hardened Teeth、Precision CNC Machined
Image of #40 Roller Chain Sprocket,Type B,with 3 /4 inch Bore Diameter and 21 Tooth,Made of AISI 1045 Medium Carbon Steel、Rust-Resistant、Hardened Teeth、Precision CNC Machined
Image of #40 Roller Chain Sprocket,Type B,with 3 /4 inch Bore Diameter and 21 Tooth,Made of AISI 1045 Medium Carbon Steel、Rust-Resistant、Hardened Teeth、Precision CNC Machined

Rating and Reviews

9 Based on 15 reviews

40 Roller Chain SprocketType Bwith 3 4 has 9 rating out of 10. This average rating is consist of 15 individual ratings. You can rate this product at product review page.

* Predictions is created on based of past prices and trends, it does not guarantee that it will happen. These are just prediction for theoretical information only.
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