Sorry, online purchases are not available in your country.
Confirmation
Do you really want to delete this item(s) from your shopping cart?
Close

Managing quotes online is only available to users with corporate accounts. You can still request a quote, but it will be emailed to you.

Request Quote

Upgrade to a corporate account for advanced options and personal service.

ATTENTION
Attention
  • BDI’s Warehouse Store is a limited catalog featuring only stocked items, priced exclusively for self-service online purchases made within the BDI Warehouse Store.

  • Pricing shown is available ONLY in the Warehouse Store and NOT from BDI Branch offices.

  • All sales are taxable (no tax free purchases) and payable by credit card. They cannot be charged to your BDI account.

  • All orders include a $5 ground shipping charge.

  • To purchase with your BDI account, please click Cancel.
  
ATTENTION
Attention
Soon you will not be able to run BDIExpress with Internet Explorer.

Microsoft is discontinuing support for the Internet Explorer web browser and obsoleting it. Microsoft is recommending switching to Microsoft Edge.



Or click below to download another browser 
 

136 Items found

Refine by

Current selections:
Category: Table Top and Modular Sprockets
Number of Teeth: 21
categories
brand
hub type
modular
mounting method
mm in outside diameter
-
size
Need help?
905-238-3392 Distribution Center  | 

INDICATES Contract Pricing

Page 1 of 28

Next

Compare
815A21B

COMPARE

815A21B

Description
815A21B CONVEYING CHAIN SPROCKET ; 800 SERIES A TYPE HUB

MARTIN SPROCKET & GR

Part # 815A21B

BDI # 625457

Features

Bore Profile: Round
Pitch Diameter - Inch: 5.089
Pitch - Millimeter: 38.1
Inch - Metric: Inch
Material: Cast Iron

Outside Diameter - Inch: 5.12
Other Features: Block Body
Pitch Diameter - Millimeter: 129.261
Modular - Flat Top Size: 60 | 66 | 810 | 812 | 815 | 881
Mounting Method: Rough Bore

Price Inventory : Available to order
QTY
815BS21 1

COMPARE

815BS21 1

Description
815BS21 1 CONVEYING CHAIN SPROCKET ; 800 SERIES BORE TO SIZE

MARTIN SPROCKET & GR

Part # 815BS21 1

BDI # 625468

Features

Bore Profile: Round
Pitch Diameter - Inch: 5.089
Pitch - Millimeter: 38.1
Inch - Metric: Inch
Material: Cast Iron

Outside Diameter - Inch: 5.12
Other Features: Arm Body
Pitch Diameter - Millimeter: 129.261
Modular - Flat Top Size: 60 | 66 | 810 | 812 | 815 | 881
Mounting Method: Finished Bore

Price Inventory : Available to order
QTY
881C21 MPB 3/4

COMPARE

881C21 MPB 3/4

Description
881C21 ROLLER CHAIN SPROCKET ; ROUGH; 3/4" ID X 130.5MM OD X 1-1/4" WD

MARTIN SPROCKET & GR

Part # 881C21

BDI # 625635

Features

Bore Profile: Round
Pitch Diameter - Inch: 5.089
Pitch - Millimeter: 38.1
Inch - Metric: Inch
Material: Cast Iron

Outside Diameter - Inch: 5.12
Outside Diameter - Millimeter: 130.048
Pitch Diameter - Millimeter: 129.261
Modular - Flat Top Size: 881
Mounting Method: Rough Bore

Price Inventory : Available to order
QTY
QRS815A21P

COMPARE

QRS815A21P

Description
QRS815A21P CONVEYING CHAIN SPROCKET ; QRS SPLIT-PLASTIC

MARTIN SPROCKET & GR

Part # QRS815A21P

BDI # 610576

Features

Bore Profile: Round
Pitch Diameter - Inch: 5.089
Pitch - Millimeter: 38.1
Inch - Metric: Inch
Material: Thermoplastic

Outside Diameter - Inch: 5.12
Other Features: 5/16-18 Standard Set Screw at 90 Deg
Pitch Diameter - Millimeter: 129.261
Modular - Flat Top Size: 60 | 66 | 810 | 812 | 815 | 881
Mounting Method: Finished Bore

Price Inventory : Available to order
QTY
QRS815A21

COMPARE

QRS815A21

Description
QRS815A21 CONVEYING CHAIN SPROCKET ; QRS SPLIT-STEEL

MARTIN SPROCKET & GR

Part # QRS815A21

BDI # 610575

Features

Bore Profile: Round
Pitch Diameter - Inch: 5.089
Pitch - Millimeter: 38.1
Inch - Metric: Inch
Material: Steel

Outside Diameter - Inch: 5.12
Other Features: 5/16-18 Standard Set Screw at 90 Deg
Pitch Diameter - Millimeter: 129.261
Modular - Flat Top Size: 60 | 66 | 810 | 812 | 815 | 881
Mounting Method: Finished Bore

Price Inventory : Available to order
QTY

© copyright 2025 BDI All Rights Reserved