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

Technical Specifications

Input Bore (C Face)	0.625
Input Diameter (in)	0.625 in
Input RPM	1,750
Gear Type	Worm
Output HP	0.19
Input Style	Flexible Coupling Input
Series Code	GRG
Ratio Range	80:1
Mounting Style	Base
Output Shaft Orientation	L
Ratio	80:1
Output Diameter (in)	1.000 in
Input HP	0.304
Series	GRG Series - Ironman Worm Gear Reducers
Output RPM	21
Product Line	GRG Series - Ironman Worm Gear Reducers
Thrust Rating - output shaft	1144
Motor Frame Size	56
Output Shaft Assembly Code	L
Shaft Seal Material	Viton
Reducer Style	Worm - Right Angle
Output Style	L
Product Type	Right Angle
Output Key	1/4 x 1.44
Assembly	BM-L
No. of Gear Reductions	Single
Model Code	BM821
Service Factor	1
Input HP @ 1750 RPM	0.304
Reducer	Worm - Right Angle
Input Keyway	3/16 X 1.38 in
Series Style	GRG-BM-L
Frame Size	56C
Input Keyway (C Face)	3/16 x 3/32
Overhung Load	1,495
Center Distance (in)	2.06
Reduction	Single
Output Shaft Direction	Left
Output Shaft	Solid Shaft
Housing Material	Cast Iron
Output Torque Rating (in-lb)	547 in/lbs
Overhung Load Rating (Output Shaft(lb))	1,495 lb

General Specifications

UPC	690310036273
Weight	30.00 LB