Stop searching, install MROSupply Smart Check and see our price instantly wherever you browse.

Download Now

On this significant day, may all the citizens of the country rest easy as we celebrate the nation’s birth. Happy Fourth of July! All orders entered July 3rd will be processed on July 6th.


Add products to your shopping cart
Know When You’re Overpaying
The MROSupply Chrome Extension instantly alerts you when the part you’re viewing is available for less at MROSupply.
Download Now
We never track your browsing or search history
We never sell your data to third parties
40BS21 5/8

Image for Illustration purposes only. Actual product may vary

View in markdown

Martin 40BS21 5/8 Type B finished bore roller chain sprocket for #40 chain, 1/2" pitch, 21 teeth, 5/8" bore with keyway and two setscrews. Steel construction with hub on one side. Outside diameter 3.617".

MODEL 40BS21 5/8

SKU

261448

WEIGHT

1.740 lb

UOM

each

Contact supplier for technical support on: 323-728-8117

$47.31 Each

Prices are subject to change

FREE SHIPPING ON ORDERS OVER $100

Select Quantity

GET A QUOTE

Typically Ships in: 1 day

Returnable: See conditions

Bore

5/8"

Material

Steel

Number Of Teeth

21

Outside Dia

3.617"

Pitch

0.500 in.

Teeth

21

MaterialSteelHub Outside Diameter2.750 in.
Chain Number40Length thru Bore1.000 in.
Chain Pitch0.500 in.Hub Recessed For ChainNo
Number of Chain Rows1Construction DetailSolid
Number of Teeth21Bore TypeBored To Size
Outside Diameter3.617 in.Finished Bore Size0.625 in.
Pitch Diameter3.355 in.Key Way Size3/16x3/32 in.
Single Strand Tooth Thickness0.284 in.Set Screw Size1/4-20X1/4 in.
Hardened TeethNoSet Screw Location(2) Set Screws (1) Over Kw And (1) At 90
Hub ConfigurationB
Storage Dimension Length4.313 in.Weight1.55 lbs.
Storage Dimension Width4.313 in.Individually PackagedYes
Storage Dimension Height1.060 in.

SKU: 263484

Solid product at a great price

Solid product, fair and super fast shipping! MROSUPPLY delivers it all!

Read more

SKU: 249218

Service

qUICK SERVICE ON THIS ORDER

Read more

SKU: 265185

Great prices and quality products

Your products are not only affordable, but they are also priced very fairly and competitively & always ship out pretty quickly. You have gained a new regular customer and stolen us from one of our regular distributors without even trying. Thank you for being awesome! Not to mention the free shipping over $100 perk is super appreciated as we not only are saving money per item, but we are also able to buy in bulk without the additional burden of freight/shipping costs. THANK YOU!! :)

Read more

SKU: 262256

Works great

Works perfect and made my gokart way faster

Read more
Suggested Items
Reviews

SKU: 263484

Solid product at a great price

Solid product, fair and super fast shipping! MROSUPPLY delivers it all!

Read more

SKU: 249218

Service

qUICK SERVICE ON THIS ORDER

Read more

SKU: 265185

Great prices and quality products

Your products are not only affordable, but they are also priced very fairly and competitively & always ship out pretty quickly. You have gained a new regular customer and stolen us from one of our regular distributors without even trying. Thank you for being awesome! Not to mention the free shipping over $100 perk is super appreciated as we not only are saving money per item, but we are also able to buy in bulk without the additional burden of freight/shipping costs. THANK YOU!! :)

Read more

SKU: 262256

Works great

Works perfect and made my gokart way faster

Read more

Return policy

Item must be unused.

Item must be in it's original package.

Restocking, shipping and handling fees may apply to any return with this manufacturer.

For more information please consult https://www.mrosupply.com/page/returnwarranty-policy/