Image for Illustration purposes only. Actual product may vary

Martin 40B21SS Type B plain bore roller chain sprocket for #40 chain (1/2" pitch), 21 teeth, stainless steel (304 SS) construction. Hub on one side for re-boring. Outside diameter: 3.618".

Name: Martin 40B21SS Type B plain bore roller chain sprocket for #40 chain (1/2" pitch), 21 teeth, stainless steel (304 SS) construction. Hub on one side fo
Brand: Martin Sprocket
Price: 222.4 USD
Availability: InStock
Rating: 5.0 (4 reviews)

MODEL 40B21SS

BRAND

Martin Sprocket

SKU

261967

WEIGHT

1.780 lb

UOM

each

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

$222.40 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

Material

Stainless Steel

Number Of Teeth

Outside Dia

3.618"

Pitch

0.500 in.

Material	Stainless Steel	Hub Configuration	B
Chain Number	40	Hub Outside Diameter	2.750 in.
Chain Pitch	0.500 in.	Length thru Bore	1.000 in.
Number of Chain Rows	1	Hub Recessed For Chain	No
Number of Teeth	21	Construction Detail	Solid
Outside Diameter	3.618 in.	Bore Type	Stock Bore
Pitch Diameter	3.355 in.	Min Bore Size	0.625 in.
Single Strand Tooth Thickness	0.284 in.	Max Bore Size	1.875 in.
Hardened Teeth	No

Storage Dimension Length	3.778 in.	Weight	1.78 lbs.
Storage Dimension Width	3.778 in.	Individually Packaged	No
Storage Dimension Height	1.000 in.

SKU: 251157

21 tooth 12 dp spur gear

The 21 tooth 12 DP gear I bought arrived very quickly. It was exactly what I needed to fix my RV slide out. I had to machine it to fit, but I knew that when I ordered it. VERY SATISFIED!!!

SKU: 249218

Service

qUICK SERVICE ON THIS ORDER

SKU: 250108

Free freight !

Easy to do business with

SKU: 262256

Works great

Works perfect and made my gokart way faster

When will I be charged for my order?

Do you provide credit terms?

Can I get a discounted price? I am a reseller / government entity.

What is the return/warranty policy?

Can it be shipped today?

Does “Usually ships in 24 hours” mean it’s in stock?

Read full FAQ

Suggested Items

#261211

Martin 40A112 Type A plain bore roller chain sprocket for #40 chain, 1/2" pitch, 112 teeth, 18.121" outside diameter. Flat plate design with no hub, steel construction. Suitable for applications requiring a lightweight, compact sprocket where hub projection is not needed.

Brand

Martin Sprocket

Model

40A112

$144.64 Each

Free Shipping orders over $100

#2265612

HKK RC040R1A (alt. 40R10) is a standard ANSI 40 single strand roller chain with 1/2" pitch, 10 ft reel. Features solid bushings and rollers, pin diameter 0.156", plate height 0.457", roller diameter 0.312", roller width 5/16". Average ultimate strength 4,300 lbs, maximum allowable load 940 lbs. ANSI B29.1 compliant, made in Japan.

Brand

HKK Chain

Model

40R10

$8.64 Per Foot

Free shipping

#261213

Martin 40A13 Type A plain bore roller chain sprocket for #40 chain with 1/2" pitch, 13 teeth, and 2.329" outside diameter. Flat plate design with no hub, steel construction. Suitable for light-duty applications where a simple, economical sprocket is required.

Brand

Martin Sprocket

Model

40A13

$23.74 Each

Free shipping

#261967

Martin 40B21SS Type B plain bore roller chain sprocket for #40 chain (1/2" pitch), 21 teeth, stainless steel (304 SS) construction. Hub on one side for re-boring. Outside diameter: 3.618".

Brand

Martin Sprocket

Model

40B21SS

$222.40 Each

Free Shipping orders over $100

#261212

Martin 40A12 Type A plain bore roller chain sprocket for #40 chain, 1/2" pitch, 12 teeth, 2.166" outside diameter. Flat plate design with no hub, steel construction. Suitable for light-duty applications where a simple, economical sprocket is required.

Brand

Martin Sprocket

Model

40A12

$23.37 Each

Free shipping

Alternatives Products from another supplier. Note, it may not be identical in style or function to original item

#396904

U.S. Tsubaki 40B21SS #40 roller chain sprocket with 21 teeth and Type B single hub. Plain bore (stock bore) for custom machining. Pitch 0.500 in, outside diameter 3.620 in. Suitable for ANSI #40 roller chain drives in industrial power transmission and conveyor applications.

Brand

U.S.Tsubaki

Model

40B21SS

$186.08 Each

Free Shipping orders over $100

#571077

Linn-Gear 40B21SS Stainless Steel Sprocket H1

Brand

Linn Gear

Model

40B21SS

$138.32 Each

Free Shipping orders over $100

Reviews

SKU: 251157

21 tooth 12 dp spur gear

The 21 tooth 12 DP gear I bought arrived very quickly. It was exactly what I needed to fix my RV slide out. I had to machine it to fit, but I knew that when I ordered it. VERY SATISFIED!!!

SKU: 249218

Service

qUICK SERVICE ON THIS ORDER

SKU: 250108

Free freight !

Easy to do business with

SKU: 262256

Works great

Works perfect and made my gokart way faster

Martin 40B21SS Type B plain bore roller chain sprocket for #40 chain (1/2" pitch), 21 teeth, stainless steel (304 SS) construction. Hub on one side for re-boring. Outside diameter: 3.618".

Return policy