• Rugged cast iron housings, covers, and flanges provide superior strength and rigidity.
• Factory-filled with premium Mobil Glygoyle 460 polyalkalene glycol lubricant.
• Large oil capacity provides positive splash lubrication and superior cooling capability.
• Viton® double lip seals provide extended life through increased resistance to high temperature, abrasion and chemicals.
• O-rings on all bearing covers, eliminating gaskets, sealants and leaks.
• Oversized high-speed bearings, positively retained for frequent reversing and start/stop cycles. Tapered roller bearings on output shaft for high overhung and thrust load capacities.
• The unique quill seal guard protects the input seal from damage during motor installation.
• Bronze worm gear chill cast from high quality bronze for maximum strength, lubricity and superior life.
• All units are 100% run and leak tested at the factory to insure that you receive the highest quality product.
• Ultimate application flexibility with all-angle mounting provisions, the widest selection of accessory bases and flanges and the largest selection of stock reducer styles.

Dimensions

M	1.76
T	0.875
D	2.31
I	3.61 in
C	6 in
Center Distance (in)	2.06 in
O*	2.45 in
H-Tap size	5/16 - 18 UNC in
K	1.63 in
F	1.88
A	2.5
J	3.25 in
L	4.82 in
O	2.66 in
B	4.5
G	0.94
N	4.34
U	0.625 in
TAP Depth	0.63 in

Technical Specifications

Mounting Style	Base
Input Keyway	3/16 X 1.38 in
Reducer	Worm - Right Angle
Output Shaft Assembly Code	D
Reducer Style	Worm - Right Angle
Assembly	B-D
Ratio	5:1
Output Diameter (in)	0.875 in
Overhung Load	1,000
Product Line	NH Series - Ironman Narrow Housing Worm Gear Reducers
Series Style	NH-B-D
Input HP	3.653
Thrust Rating - output shaft	735
Input HP @ 1750 RPM	3.653
Center Distance (in)	2.06
Service Factor	1
Input Diameter (in)	0.625 in
Gear Type	Worm
Output Shaft Orientation	LR
Series Code	NH
Input RPM	1,750
Product Type	Right Angle
Model Code	B821
Input Style	Solid Shaft
Output Style	D
No. of Gear Reductions	Single
Shaft Seal Material	Viton
Output Key	3/16 X 1.50
Output HP	3.41
Ratio Range	5:1
Series	NH Series - Ironman Narrow Housing Worm Gear Reducers
Output RPM	350
Reduction	Single
Output Shaft Direction	Double
Housing Material	Cast Iron
Overhung Load Rating (Output Shaft(lb))	775 lb
Output Torque Rating (in-lb)	614 in/lbs
Output Shaft	Solid Shaft

General Specifications

UPC	690310061442
Weight	21.00 LB