• 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

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

Technical Specifications

Output Diameter (in)	0.875 in
Series	NH Series - Ironman Narrow Housing Worm Gear Reducers
Input Keyway (C Face)	3/16 x 3/32
Reducer	Worm - Right Angle
Product Line	NH Series - Ironman Narrow Housing Worm Gear Reducers
Input Keyway	3/16 X 1.38 in
Overhung Load	1,255
Assembly	BM-R
Frame Size	140TC
No. of Gear Reductions	Single
Gear Type	Worm
Motor Frame Size	140
Reducer Style	Worm - Right Angle
Mounting Style	Base
Output Shaft Assembly Code	R
Input HP	1.129
Series Style	NH-BM-R
Service Factor	1
Ratio Range	30:1
Thrust Rating - output shaft	1144
Input RPM	1,750
Output RPM	58
Model Code	BM821
Input Bore (C Face)	0.875
Output Style	R
Input Style	Flexible Coupling Input
Output Shaft Orientation	R
Input HP @ 1750 RPM	1.129
Input Diameter (in)	0.625 in
Ratio	30:1
Output HP	0.896
Center Distance (in)	2.06
Series Code	NH
Product Type	Right Angle
Shaft Seal Material	Viton
Output Key	3/16 X 1.50
Reduction	Single
Output Shaft Direction	Right
Output Shaft	Solid Shaft
Output Torque Rating (in-lb)	968 in/lbs
Overhung Load Rating (Output Shaft(lb))	775 lb
Housing Material	Cast Iron

General Specifications

UPC	690310062050
Weight	26.00 LB