• 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

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

Technical Specifications

Ratio Range	15:1
Output Diameter (in)	0.875 in
Thrust Rating - output shaft	1099
Input RPM	1,750
Series Code	NH
No. of Gear Reductions	Single
Product Type	Right Angle
Input Style	Flexible Coupling Input
Output Shaft Orientation	L
Input HP	1.887
Input Bore (C Face)	0.875
Input Keyway (C Face)	3/16 x 3/32
Shaft Seal Material	Viton
Series Style	NH-BM-L
Ratio	15:1
Output HP	1.661
Model Code	BM821
Reducer Style	Worm - Right Angle
Input HP @ 1750 RPM	1.887
Output RPM	116
Reducer	Worm - Right Angle
Input Keyway	3/16 X 1.38 in
Service Factor	1
Product Line	NH Series - Ironman Narrow Housing Worm Gear Reducers
Series	NH Series - Ironman Narrow Housing Worm Gear Reducers
Input Diameter (in)	0.625 in
Assembly	BM-L
Output Shaft Assembly Code	L
Motor Frame Size	140
Center Distance (in)	2.06
Gear Type	Worm
Mounting Style	Base
Frame Size	140TC
Overhung Load	1,125
Output Key	3/16 X 1.50
Output Style	L
Reduction	Single
Output Shaft Direction	Left
Output Torque Rating (in-lb)	897 in/lbs
Output Shaft	Solid Shaft
Housing Material	Cast Iron
Overhung Load Rating (Output Shaft(lb))	775 lb

General Specifications

UPC	690310061954
Weight	26.00 LB