• 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

G	0.94
T	0.875
U	0.625 in
TAP Depth	0.63 in
AK	4.5
BD	6.5
AJ	5.88
N	4.34
O	2.66 in
B	4.5
BE	0.38 in
D	2.31
LM	7.07
C	6 in
J	3.25 in
H-Tap size	5/16 - 18 UNC in
L	4.82 in
K	1.63 in
A	2.5
I	3.61 in
BF	0.41
Center Distance (in)	2.06 in
F	1.88

Technical Specifications

Input HP @ 1750 RPM	0.916
Ratio Range	40:1
Series Style	NH-BM-R
Input HP	0.916
Output Style	R
Thrust Rating - output shaft	1144
No. of Gear Reductions	Single
Ratio	40:1
Series	NH Series - Ironman Narrow Housing Worm Gear Reducers
Motor Frame Size	56
Model Code	BM821
Output HP	0.674
Output Shaft Assembly Code	R
Input Diameter (in)	0.625 in
Assembly	BM-R
Product Type	Right Angle
Input RPM	1,750
Mounting Style	Base
Center Distance (in)	2.06
Output Key	3/16 X 1.50
Shaft Seal Material	Viton
Output RPM	43
Reducer Style	Worm - Right Angle
Output Diameter (in)	0.875 in
Output Shaft Orientation	R
Input Keyway (C Face)	3/16 x 3/32
Series Code	NH
Input Bore (C Face)	0.625
Gear Type	Worm
Reducer	Worm - Right Angle
Product Line	NH Series - Ironman Narrow Housing Worm Gear Reducers
Service Factor	1
Input Style	Flexible Coupling Input
Overhung Load	1,315
Frame Size	56C
Input Keyway	3/16 X 1.38 in
Reduction	Single
Output Shaft Direction	Right
Output Torque Rating (in-lb)	971 in/lbs
Overhung Load Rating (Output Shaft(lb))	775 lb
Output Shaft	Solid Shaft
Housing Material	Cast Iron

General Specifications

UPC	690310061756
Weight	26.00 LB