• Aluminum housing provides superior resistances to corrosion, even in harsh environments.
• Factory-filled with premium Mobil Glygoyle 460 polyalkalene glycol lubricant – USDA Class H1 approved.
• 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.
• 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.
• The unique quill seal guard protects the input seal from damage during motor installation.
• 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

Center Distance (in)	2.06 in
N	4.68
K	2.06 in
LM	6.26
BF	0.41
B	5.75
D	2.63
AJ	5.88
BE	0.38 in
I	3.4 in
AK	4.5
F	3.25
TAP Depth	0.87 in
J	4.13 in
U	0.625 in
L1	4 in
A	3.91
T	1
BD	6.5
O	2.29 in
G	1.63
H-Tap size	3/8-16 in
C	6.88 in

Technical Specifications

Center Distance (in)	2.06
Ratio Range	50:1
Product Type	Right Angle
Input Bore (C Face)	0.875
Output Diameter (in)	1.000 in
Output Key	1/4 x 1.44
Ratio	50:1
Thrust Rating - output shaft	1144
Output RPM	35
Model Code	BM821
Product Line	EL Series - Aluminum Worm Gear Reducers
Output Style	L
Output Shaft Assembly Code	L
Output Shaft Orientation	L
Input Style	Flexible Coupling Input
Shaft Seal Material	Viton
Series Style	EL-BM-L
Reducer Style	Worm - Right Angle
Output HP	0.539
Reducer	Worm - Right Angle
Series Code	EL
Input HP	0.769
Mounting Style	Base
No. of Gear Reductions	Single
Frame Size	140TC
Service Factor	1
Input Keyway	3/16 x 0.500 in
Input HP @ 1750 RPM	0.769
Input Diameter (in)	0.625 in
Gear Type	Worm
Assembly	BM-L
Input Keyway (C Face)	3/16 x 3/32
Input RPM	1,750
Overhung Load	1,385
Series	EL Series - Aluminum Worm Gear Reducers
Motor Frame Size	140
Reduction	Single
Output Shaft Direction	Left
Output Torque Rating (in-lb)	970 in/lbs
Housing Material	Aluminum
Overhung Load Rating (Output Shaft(lb))	1,385 lb
Output Shaft	Solid Shaft

General Specifications

UPC	662959007587
Weight	20.00 LB