• 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

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

Technical Specifications

Input RPM	1,750
Input HP @ 1750 RPM	1.333
Output Shaft Orientation	R
Service Factor	1
Output Diameter (in)	0.875 in
Model Code	B821
Gear Type	Worm
Assembly	B-R
Input Style	Solid Shaft
Ratio	25:1
Output HP	1.094
Ratio Range	25:1
Output Shaft Assembly Code	R
No. of Gear Reductions	Single
Series Style	NH-B-R
Thrust Rating - output shaft	1144
Output Style	R
Input Keyway	3/16 X 1.38 in
Output RPM	70
Reducer Style	Worm - Right Angle
Input HP	1.333
Series Code	NH
Product Line	NH Series - Ironman Narrow Housing Worm Gear Reducers
Product Type	Right Angle
Mounting Style	Base
Shaft Seal Material	Viton
Reducer	Worm - Right Angle
Overhung Load	1,210
Series	NH Series - Ironman Narrow Housing Worm Gear Reducers
Center Distance (in)	2.06
Output Key	3/16 X 1.50
Input Diameter (in)	0.625 in
Reduction	Single
Output Shaft Direction	Right
Overhung Load Rating (Output Shaft(lb))	775 lb
Output Shaft	Solid Shaft
Output Torque Rating (in-lb)	985 in/lbs
Housing Material	Cast Iron

General Specifications

UPC	690310061374
Weight	21.00 LB