• 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

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

Technical Specifications

Product Line	GRG Series - Ironman Worm Gear Reducers
Ratio Range	100:1 to 250:1
Input Keyway (C Face)	3/16 x 3/32
Input RPM	1,750
Output HP	0.122
Output Diameter (in)	1.000 in
Reducer Style	Worm - Right Angle
Output Style	D
Service Factor	1
Input HP	0.217
Input Diameter (in)	0.625 in
Gear Type	Worm
Mounting Style	Base
Ratio	100:1
Input Keyway	3/16 X 1.38 in
Series	GRG Series - Ironman Worm Gear Reducers
Overhung Load	1,580
Model Code	BM821
Series Style	GRG-BM-D
Frame Size	56C
Input Style	Flexible Coupling Input
Shaft Seal Material	Viton
Motor Frame Size	56
Center Distance (in)	2.06
Assembly	BM-D
Input HP @ 1750 RPM	0.217
No. of Gear Reductions	Single
Series Code	GRG
Thrust Rating - output shaft	1144
Output Shaft Orientation	LR
Output Key	1/4 x 1.44
Reducer	Worm - Right Angle
Input Bore (C Face)	0.625
Output Shaft Assembly Code	D
Output RPM	17
Product Type	Right Angle
Reduction	Single
Output Shaft Direction	Double
Overhung Load Rating (Output Shaft(lb))	1,580 lb
Output Shaft	Solid Shaft
Output Torque Rating (in-lb)	439 in/lbs
Housing Material	Cast Iron

General Specifications

UPC	690310036525
Weight	30.00 LB