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

Happy Memorial Day Weekend! MROSupply stands grateful for the commitment and sacrifice made by the military and their families. While we are honoring the memory of service people around the world, operations on Monday May 25th may be slower than usual.

Add products to your shopping cart

ND21B-7/8

Image for Illustration purposes only. Actual product may vary

Boston Gear 30229694 ND21B-7/8 spur gear with 12 diametral pitch, 21 teeth, and 14.5 degree pressure angle. Bored to 7/8 inch for direct shaft mounting. Steel construction for general industrial open gearing applications.

MODEL ND21B-7/8

BRAND

SKU

37320

WEIGHT

0.641 lb

UOM

each

Contact supplier for technical support on: 800-626-2120

$109.99 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 Diameter (IN)

0. 875

Face Width (IN)

0. 750

Hub Diameter (IN)

1. 39

Pitch Diameter (IN)

1. 750

Speed

1800 RPM

Torque Rating (LB IN)

133 @1800 RPM MAX

Description	SPUR GEAR, 12 DP, 14 1/2 PA, 21 TEETH, STEEL
Torque Rating (LB IN)	133 @1800 RPM MAX
Keyway/Setscrew	WITH KWY & SETSCREW
Pitch Diameter (IN)	1. 750
Face Width (IN)	0. 750
Bore Diameter (IN)	0. 875
Hub Diameter (IN)	1. 39

Catalog Product Section

Engineering Data

Full Catalog

SKU: 32204

Excellent customer service

The couplings are just what they are supposed to be. But I wanted to comment on MRO. This was my first order with them and I was extremely surprised at how well the company is run. I will be doing more business with them in the future.

SKU: 34979

Na40

Fast shipping!!! Great to do business with.

SKU: 35645

Change gears

Found what I needed, fair price,...fast delivery....All Good!! Good job MRO Supply!

SKU: 36240

Finding the right parts.

MRO made it quick and easy.

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?

Recently Viewed

#322440

23028 CC/W33

SKF 23028 CC/W33 spherical roller bearing, 140mm bore, 5 1/2 in ID, 8 2/7 in OD. Pressed steel cage (CC) with annular lube groove and three lube holes (W33) for relubrication. Carries high radial loads and moderate axial loads in both directions, accommodating misalignment. Suitable for heavy-duty industrial gearboxes, fans, and mining equipment.

Brand	SKF Bearing
Model	23028 CC/W33

$927.04 Each

Free Shipping orders over $100

#271227

QJ311

NTN QJ311 four-point contact ball bearing with a 55 mm straight bore. Open design accommodates combined radial and axial loads in both directions. Suitable for gearboxes, pumps, and industrial machinery requiring axial load capacity.

Brand	NTN Bearing
Model	QJ311

$412.74 Each

Free Shipping orders over $100

#248670

SDS 1 7/16

Martin SDS 1 7/16 Quick Disconnect (QD) bushing. Type SDS split taper bushing with 1-7/16" bore, steel construction, and 3/8" x 3/16" keyway. Industry-interchangeable with Dodge, Browning, and Gates SDS bushings. Torque rating: 5,000 in-lb.

Brand	Martin Sprocket
Model	SDS 1 7/16

$32.08 Each

Free shipping

#2066725

QJ 305 MA/C2L

SKF QJ 305 MA/C2L four-point angular contact ball bearing, 25mm bore, machined brass cage, C2 clearance. Designed for combined radial and axial loads in both directions, suitable for pumps, gearboxes, and compressors.

Brand	SKF Bearing
Model	QJ 305 MA/C2L

$211.09 Each

Free Shipping orders over $100

#313646

QJ 208 MA

SKF QJ 208 MA is a 40mm bore four-point angular contact ball bearing with a machined brass cage. Designed for combined radial and axial loads in both directions, it is suitable for pumps, compressors, and gearboxes where space is limited.

Brand	SKF Bearing
Model	QJ 208 MA

$226.13 Each

Free Shipping orders over $100

#96712756

SSHF7210B-30KC-B5-HS1-P19

Boston Gear 30727612 SSHF7210B-30KC-B5-HS1-P19 is a 30:1 single reduction stainless steel worm gear speed reducer from the 700 Series. It features a 2.1" center distance, 56C quill flange input, and hollow bore output. The stainless steel housing provides corrosion resistance for washdown environments.

Brand	Boston Gear
Model	SSHF7210B-30KC-B5-HS1-P19

$2,823.17 Each

Free Shipping orders over $100

#5927417

100-S3M-900UK

Bando 100-S3M-900UK Synchro-Link synchronous timing belt with 900mm pitch circumference, 3mm pitch, 10mm face width, and 300 teeth. Polyurethane construction with glass cord for precision drives. Suitable for CNC equipment, robotics, and industrial applications requiring zero-slip power transmission.

Brand	Bando
Model	100-S3M-900UK

$17.67 Each

Free shipping

#25589

EJMM3550T

Baldor EJMM3550T is a 1.5 HP, 3480 RPM, 3-phase close-coupled pump motor with a 143JM NEMA frame and Totally Enclosed Fan Cooled (TEFC) enclosure. Designed for direct connection to pumps in industrial and commercial applications, it operates on 60 Hz power. This motor features a JM pump shaft and face with base for secure mounting, cast iron construction for durability, and is part of Baldor's pump motor line.

Brand	Baldor
Model	EJMM3550T

Add to cart to see price

Free Shipping orders over $100

Reviews

SKU: 32204

Excellent customer service

The couplings are just what they are supposed to be. But I wanted to comment on MRO. This was my first order with them and I was extremely surprised at how well the company is run. I will be doing more business with them in the future.

SKU: 34979

Na40

Fast shipping!!! Great to do business with.

SKU: 35645

Change gears

Found what I needed, fair price,...fast delivery....All Good!! Good job MRO Supply!

SKU: 36240

Finding the right parts.

MRO made it quick and easy.