• 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

T	1
TAP Depth	0.63 in
BE	0.38 in
BD	6.5
BF	0.41
N	4.68
B	5.8
AK	4.5
A	3.81
K	2.5 in
L	4.82 in
U	0.625 in
O*	2.08 in
LM	7.07
F	2.88
AJ	5.88
H-Tap size	5/16-18 UNC in
C	6.38 in
Center Distance (in)	2.06 in
I	3.61 in
O	2.29 in
J	5 in
D	2.28
G	1.44

Technical Specifications

Product Type	Worm Speed Reducer
Reducer	Worm - Right Angle
Product Line	GRL Series - Ironman Worm Gear Reducers
Input Diameter (in)	0.625 in
Model Code	BM821
Output Diameter (in)	1.000 in
Input RPM	1,750
Motor Frame Size	56C
Frame Size	56C
Output RPM	43
Input Keyway	3/16 X 1.38 in
Ratio Range	40:1
Input Style	Flexible Coupling Input
Overhung Load	1,315
Output Key	1/4 X 1.44
Input HP	0.916
Series	GRL Series - Ironman Worm Gear Reducers
Output Shaft Assembly Code	D
Mounting Style	Base
Series Code	GRL
Center Distance (in)	2.06
Ratio	40:1
Series Style	GRL-BM-D
Reducer Style	Worm - Right Angle
Shaft Seal Material	Viton
No. of Gear Reductions	Single
Input HP @ 1750 RPM	0.916
Service Factor	1
Output Shaft Orientation	LR
Output HP	0.674
Input Keyway (C Face)	3/16 x 3/32
Output Style	D
Input Bore (C Face)	0.625
Assembly	BM-D
Thrust Rating - output shaft	1144
Gear Type	Worm
Reduction	Single
Output Shaft Direction	Double
Overhung Load Rating (Output Shaft(lb))	1,315 lb
Output Torque Rating (in-lb)	971 in/lbs
Output Shaft	Solid Shaft
Housing Material	Cast Iron

General Specifications

UPC	690310047422
Weight	30.00 LB