• 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

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

Technical Specifications

Frame Size	56C
Series Type	Cast Iron 800 Worm Gear Reducers
Output RPM	58
Series Code	GRG
Mounting Style	Base
Output Shaft Assembly Code	D
Input RPM	1,750
No. of Gear Reductions	Single
Reducer Style	Worm - Right Angle
Output Key	1/4 X 1.44
Output Shaft Orientation	LR
Keyway	3/16 X 3/32
Output Style	D
Output HP	0.896
Input HP	1.129
Series Style	GRG-BM-D
Overhung Load	1,255
Input Style	Flexible Coupling Input
Service Factor	1
Motor Frame Size	56C
Model Code	BM821
Output Diameter (in)	1.000 in
Thrust Rating - output shaft	1144
Ratio Range	30:1
Center Distance (in)	2.06
Gear Type	Worm
Shaft Seal Material	Viton
Ratio	30:1
Series	GRG Series - Ironman Worm Gear Reducers
Input Keyway (C Face)	3/16 x 3/32
Input Diameter (in)	0.625 in
Assembly	BM-D
Input Bore (C Face)	0.625
Reducer	Worm - Right Angle
Input HP @ 1750 RPM	1.129
Input Keyway	3/16 X 1.38 in
Product Line	GRG Series - Ironman Worm Gear Reducers
Product Type	Worm Speed Reducer
Reduction	Single
Output Shaft Direction	Double
Output Torque Rating (in-lb)	968 in/lbs
Output Shaft	Solid Shaft
Housing Material	Cast Iron
Overhung Load Rating (Output Shaft(lb))	1,255 lb

General Specifications

UPC	690310036471
Weight	30.00 LB
Packaged Length	10.69 IN
Packaged Width	9.06 IN
Packaged Height	10.50 IN