• 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

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

Technical Specifications

Output HP	0.674
Output Shaft Orientation	L
Output Key	1/4 x 1.44
Series Code	GRG
Input RPM	1,750
Thrust Rating - output shaft	1144
Assembly	BM-L
Frame Size	140TC
Reducer	Worm - Right Angle
Input Diameter (in)	0.625 in
Gear Type	Worm
Product Line	GRG Series - Ironman Worm Gear Reducers
Input HP	0.916
Mounting Style	Base
Input Style	Flexible Coupling Input
Ratio Range	40:1
Ratio	40:1
Product Type	Right Angle
Model Code	BM821
Output Diameter (in)	1.000 in
Motor Frame Size	140
Output Style	L
Input Keyway (C Face)	3/16 x 3/32
Series	GRG Series - Ironman Worm Gear Reducers
No. of Gear Reductions	Single
Output RPM	43
Input Keyway	3/16 X 1.38 in
Input HP @ 1750 RPM	0.916
Overhung Load	1,315
Shaft Seal Material	Viton
Output Shaft Assembly Code	L
Center Distance (in)	2.06
Reducer Style	Worm - Right Angle
Input Bore (C Face)	0.875
Service Factor	1
Series Style	GRG-BM-L
Reduction	Single
Output Shaft Direction	Left
Housing Material	Cast Iron
Output Torque Rating (in-lb)	971 in/lbs
Overhung Load Rating (Output Shaft(lb))	1,315 lb
Output Shaft	Solid Shaft

General Specifications

UPC	690310036594
Weight	30.00 LB