• Rugged cast iron housings, covers, and flanges provide superior strength and rigidity.
• 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.
• O-rings on all bearing covers, eliminating gaskets, sealants and leaks.
• 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.
• Bronze worm gear chill cast from high quality bronze for maximum strength, lubricity and superior life.
• 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.

Dimensions

AB	3.44
D	2.06
AG	4.29
V	1.44 in
BE	0.38 in
U	0.625 in
H	0.53 in
I	3.24 in
LL	1.98 in
L	4.45 in
G	1.82
P	1.38 in
AF	0.19
BF	0.41
Center Distance (in)	1.75 in
BD	6.5
AE1	0.551
AK	4.5
T	1
B	4.5
AA	7.44
LM	6.7
AJ	5.88
AE2	0.56

Technical Specifications

Bore Code	16
Ratio Range	7.5:1
Ratio	7.5:1
Service Factor	1
No. of Gear Reductions	Single
Output Diameter (in)	1 in
Reducer Style	Worm - Right Angle
Product Type	Right Angle
Input RPM	1,750
Shaft Seal Material	Viton
Output Key	1/4 X 2.50
Product Line	NH Series - Ironman Narrow Housing Worm Gear Reducers
Input HP @ 1750 RPM	1.909
Model Code	HM818
Output HP	1.745
Series Style	NH-HM-H1
Series	NH Series - Ironman Narrow Housing Worm Gear Reducers
Gear Type	Worm
Series Code	NH
Input Bore (C Face)	0.625
Output Style	H1
Input Diameter (in)	0.625 in
Motor Frame Size	56C
Output Shaft Assembly Code	H1
Center Distance (in)	1.75
Input Style	Flexible Coupling Input
Input Keyway (C Face)	3/16 x 3/32
Output RPM	233
Assembly	HM-H1
Reducer	Worm - Right Angle
Output Shaft Orientation	H1
Mounting Style	Shaft Mount
Input Keyway	3/16 X 1.38 in
Input HP	1.909
Thrust Rating - output shaft	868
Frame Size	56C
Reduction	Single
Output Shaft Direction	H1
Output Torque Rating (in-lb)	471 in/lbs
Output Shaft	Hollow Bore
Overhung Load Rating (Output Shaft(lb))	1,250 lb
Housing Material	Cast Iron

General Specifications

UPC	690310060360
Weight	23.00 LB