• One-piece cast iron housings with single output cover design, CNC machined for precise component fit and alignment.
• 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.
• 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.
• 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.
• 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.
• Mounting dimensions are interchangeable with most industry standard reducers.

Dimensions

A	3.81
Center Distance (in)	2.06 in
I	3.61 in
BE	0.38 in
TAP Depth	0.63 in
O*	2.08 in
C	6.38 in
N	4.68
B	5.8
T	1
O	2.29 in
AJ	5.88
G	1.44
LM	7.07
J	4.75 in
AK	4.5
F	3
H-Tap size	5/16-18 UNC in
BD	6.5
L	4.82 in
K	2.5 in
D	2.28
BF	0.41
U	0.625 in
O*	2.08

Technical Specifications

Input Keyway	3/16 X 1.38 in
No. of Gear Reductions	Single
Series Code	GRG
Reducer Style	Worm - Right Angle
Motor Frame Size	56
Gear Type	Worm
Ratio Range	25:1
Service Factor	1
Shaft Seal Material	Viton
Input HP @ 1750 RPM	1.333
Model Code	BM821
Center Distance (in)	2.06
Output RPM	70
Assembly	BM-D
Input Keyway (C Face)	3/16 x 3/32
Input Diameter (in)	0.625 in
Ratio	25:1
Output Shaft Assembly Code	D
Output Style	D
Series	GRG Series - Ironman Worm Gear Reducers
Series Style	GRG-BM-D
Input Style	Flexible Coupling Input
Product Line	GRG Series - Ironman Worm Gear Reducers
Input HP	1.333
Output Shaft Orientation	LR
Input Bore (C Face)	0.625
Overhung Load	1,210
Input RPM	1,750
Frame Size	56C
Mounting Style	Base
Thrust Rating - output shaft	1144
Output Key	1/4 x 1.44
Output Diameter (in)	1.000 in
Product Type	Right Angle
Reducer	Worm - Right Angle
Output HP	1.094
Reduction	Single
Output Shaft Direction	Double
Output Shaft	Solid Shaft
Overhung Load Rating (Output Shaft(lb))	1,210 lb
Output Torque Rating (in-lb)	985 in/lbs
Housing Material	Cast Iron

General Specifications

UPC	690310036464
Weight	30.00 LB