• 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	2.16 in
H-Tap size	5/16-18 UNC in
LM	5.63
C	4.66 in
J	3.25 in
Center Distance (in)	1.33 in
A	2.82
TAP Depth	0.5 in
AJ	3.75
BF	0.28
B	3.8
AK	3
BE	0.38 in
L	3.82 in
D	1.72
BD	4.36
I	2.61 in
T	0.625
N	4
G	1
K	1.63 in
F	2
U	0.5 in

Technical Specifications

Output Diameter (in)	0.625 in
Reducer	Worm - Right Angle
Output Shaft Assembly Code	R
Input Keyway (C Face)	1/8 x 1/16
Reducer Style	Worm - Right Angle
Assembly	BM-R
Thrust Rating - output shaft	1144
No. of Gear Reductions	Single
Output Shaft Orientation	R
Output RPM	87
Input HP @ 1750 RPM	0.551
Series	GR Series - Ironman Worm Gear Reducers
Product Line	GR Series - Ironman Worm Gear Reducers
Output HP	0.445
Input HP	0.551
Ratio	20:1
Input Style	Flexible Coupling Input
Motor Frame Size	48
Frame Size	48CZ
Mounting Style	Base
Overhung Load	700
Input Diameter (in)	0.5 in
Input RPM	1,750
Center Distance (in)	1.33
Output Style	R
Input Keyway	1/8 X 1.00 in
Input Bore (C Face)	0.5
Shaft Seal Material	Viton
Service Factor	1
Series Style	GR-BM-R
Product Type	Right Angle
Ratio Range	20:1
Model Code	BM813
Output Key	3/16 x 1.50
Gear Type	Worm
Series Code	GR
Reduction	Single
Output Shaft Direction	Right
Output Torque Rating (in-lb)	320 in/lbs
Overhung Load Rating (Output Shaft(lb))	700 lb
Housing Material	Cast Iron
Output Shaft	Solid Shaft

General Specifications

UPC	690310003169
Weight	22.00 LB