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 
 

HD120B21F X 3-1/8 https://www.bdiexpress.com/medias/INDUSTSPKTXX-RC-B-2-KW-STL-300x300.jpg?context=bWFzdGVyfHJvb3R8MjA0NzJ8aW1hZ2UvanBlZ3xhRGsyTDJnMU5TODVPVGd3TURBM01ESXlOakl5TDBsT1JGVlRWRk5RUzFSWVdGOVNRMTlDWHpKZlMxZGZVMVJNWHpNd01IZ3pNREF1YW5Cbnw5OWZiNmE2ODkzY2UxYzdkZmJiMGVlZjdkMzFhNDM4YWI0NDkyZDcxNDM2MTUzMzVlODRiNmJkMTc4MTk5YTA0
21972736 Roller Chain Sprockets 

TSUBAKI TSUBAKI

HD120B21F X 3-1/8

Description

HD120B21 X 3-1/8 RLR CHAIN SPROCKET ; 120 CHAIN 21 TEETH 2 STRD 3-1/8IN BORE

Roller Chain Sprocket; 3-1/8" Bore; 120-2 Chain; 21 Teeth; 2 Row of Teeth; Hardened Teeth; 10.853" Outside Diameter; 10.065" Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 1-1/2" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material

Part #

D120B21F X 3B

BDI #
21972736

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Details

451.5211 USD 2099-12-31 http://schema.org/NewCondition https://schema.org/LimitedAvailability Your Price $ 451.52 / each BDIExpress
QTY

Inventory

Total: Available to order

Category
Roller Chain Sprockets
Brand
TSUBAKI
Manufacturer Name
TSUBAKI
Minimum Buy Quantity
N/A
Weight / US pound
55.5
Product Group - BDI
M02312
Chain Size
120-2
Number of Teeth
21
Number of Rows of Teeth
2
Hub Type
B-Hub One Side
Mounting Method
Finished Bore
Bushing Size if bushed
No Bushing
Hardened Teeth
Yes
Chain Type
ANSI Roller Chain
Keyway Yes/No
Yes
Material
Steel
Minimum Plain Bore
No
Inch - Metric
Inch
Category - BDI
Sprockets
Harmonized Tariff Code
8483.90.10.50
Noun
Sprocket
Keyword String
Roller Chain
Manufacturer URL
https://www.ustsubaki.com
Weight / LBS
55.5
Long Description
Roller Chain Sprocket; 3-1/8" Bore; 120-2 Chain; 21 Teeth; 2 Row of Teeth; Hardened Teeth; 10.853" Outside Diameter; 10.065" Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 1-1/2" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material
Pitch Diameter
10.065 Inch | 255.651 Millimeter
Chain Pitch
1.5 Inch | 38.1 Millimeter
Outside Diameter
10.853 Inch | 275.666 Millimeter
Bore
3.125 Inch | 79.375 Millimeter

These items are similar to the one you've selected.
You can uncheck any attribute to search for other items which vary in relation to that attribute.

Find alternatives

Refresh

© copyright 2025 BDI All Rights Reserved