• 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	1.25 in
Center Distance (in)	4.25 in
H-Tap size	1/2 - 13 UNC in
BF	0.53
AK	8.5
L	9.57 in
A	4.75
J	7.5 in
L1	12.9 in
B	9.75
BE1	0.5 in
AJ	7.25
O	3.88 in
BD	9
TAP Depth	1 in
K	3.75 in
D	4.5
T	1.75
C	11.5 in
G	1.88
I	6.1 in
N	7.5
F	3.75

Technical Specifications

Mounting Style	Base
Service Factor	1
Ratio	25:1
Reducer Style	Worm - Right Angle
Input RPM	1,750
Series	NH Series - Ironman Narrow Housing Worm Gear Reducers
Gear Type	Worm
Input HP	7.94
No. of Gear Reductions	Single
Output RPM	70
Output Shaft Orientation	R
Product Line	NH Series - Ironman Narrow Housing Worm Gear Reducers
Frame Size	180TC
Input Diameter (in)	1.25 in
Input Bore (C Face)	1.125
Motor Frame Size	180
Center Distance (in)	4.25
Output Key	3/8 x 2.25
Series Code	NH
Input Keyway	1/4 X 2.50 in
Model Code	BM842
Input Keyway (C Face)	1/4 x 1/8
Series Style	NH-BM-R
Input Style	Flexible Coupling Input
Output Diameter (in)	1.750 in
Ratio Range	25:1
Shaft Seal Material	Viton
Thrust Rating - output shaft	2533
Output Shaft Assembly Code	R
Output HP	6.946
Reducer	Worm - Right Angle
Assembly	BM-R
Overhung Load	3,445
Input HP @ 1750 RPM	7.94
Output Style	R
Product Type	Right Angle
Reduction	Single
Output Shaft Direction	Right
Output Shaft	Solid Shaft
Overhung Load Rating (Output Shaft(lb))	3,445 lb
Housing Material	Cast Iron
Output Torque Rating (in-lb)	6254 in/lbs

General Specifications

UPC	690310079492
Weight	131.00 LB