Boston Gear 700 Series Double Reduction – Helical Worm

Our standard 700 Series – the heart of Boston Gear’s speed reducer product line – has been serving industry reliably for over 40 years. Its proven modular design has set the industry standard for performance and is the most imitated product in today’s worm gear speed reducer market. But why settle for a knock-off when you can have the original – from Boston Gear.

CATALOG & MANUALS

 
Catalog Boston Gear Catalog 700 Series Worm Gear Drives
Users Manual Boston Gear 700 Series Single Worm Gear Installation and Operation
Dimensions Boston Gear 700 Series Single Reduction Dimensions
Order Form Boston Gear 700 Series Right Angle Helical Worm Double Reduction Order Form  

Numbering System / How to Order

When ordering reducers please include code letters for Style, Size, Base (if required), Ratio, Lubrication (if required), NEMA Mounting (if flanged reducer), Shaft Assembly and Motor (if required).

Example:

Application requirements: 125:1 reduction, 1 HP NEMA 140TC 1750 RPM, Service Class I, horizontal base, Klubersynth UH1 6-460 lubrication, with standard assembly.

 

700 Series Right Angle Helical-Worm Gearbox – Double Reduction

Reducer Material/Paint
Blank– Cast Iron, Std. Gray paint   
BKC – Cast Iron, White BostKleen paint
SBKC– Cast Iron, Stainless BostKleen paint
SS – Stainless Steel materialno paint

Output Shaft Style

Blank– Solid Output Shaft
H – BostMount Hollow Output (setscrews both sides, bore size selectable)
S – Hollow Output (setscrews one side, bore size fixed)

Input Shaft Style
Blank– Solid Projecting Input Shaft    F– Quill Style Motor Flange
RF – Coupling Style Motor Flange
QC – Quick Connect Motor Flange (close coupled)

Reduction Type
HMA – Helical Multiplier 12 O’clock
HMB – Helical Multiplier 6 O’ clock   HMC – Helical Multiplier 3 O’clock
HMD – Helical Multiplier 9 O’clock    WP – Planetary Torque Mulitplier

Center Distance (inches)
13 – 1.33         32 – 3.25
18 – 1.75         38 – 3.75
21 – 2.06         52 – 5.13
26 – 2.62         60 – 6.00
30 – 3.00

Base/Mounting Attachment*
Blank – No base kit required                A & B – Horizontal bases
C & E – Vertical High bases                    D & F – Vertical Low bases
R/L    – BostMount Output Bracket       X       – Input Vertical Up
Y       – Input Vertical Down                    V/W  – Hollow O/P with base
M/N  – Hollow O/P with CFA
*See catalog for mounting configurations

Exact Gear Ratio
0     15     20     22.5     25     30     37.5     40     45     50
60   75     80     100     125     150     200     250     300
Check Catalog – Or consult factory for availability

Lubrication
Blank– No lubrication    K – Klubersynth UH1 6-460
S – Mobil SHC 634          X – Mobil 600W

Endcap (732-760 only)
E – Endcap (standard)

Vent
Blank– Standard Vent     P – Pressure Vent (5 psi)    Z – Posivent (sealed)

Oil Seal
Blank – Standard Seal      T    – Two Standard Input Seals
C    – High pressure washdown output seals and double input seals (stainless
          products only)

NEMA Motor Mounting
BORE          NEMA                   INPUT
CODE          MOUNTING         BORE          KEYWAY
B4                42CZ                    .500”            1/8 x 1/16
B5                56C                      .625              3/16 x 3/32
B7                140TC/180C        .875              3/16 x 3/32
B9                180TC/210C       1.125             1/4 x 1/8
B11              210TC/250UC    1.375             5/16 x 5/32
B13              250TC                 1.625             3/8 x 3/16
 Output Shaft Assembly

G Output Projection Opposite Input         
H Double Output Projection
J Output Projection Same Side as Input 
GS Stainless Output Projection Opposite Input
HS Stainless Double Output Projection
JS Stainless Output Projection Same Side as Input

Mounting Positions
Blank – No Lubrication Supplied
For Factory Prelubrication Indicate Mounting Position
1   – Standard Mounting (Worm over)   
2-6– Refer to Mounting Positions in Catalog

BostMount Output Bore Code
Refer to page 128 for complete offering See catalog for availability by center
distance.

Mounting Data

 

Dimensions

 

700 Series Double Reduction Output RPM & Capacity Selection Tables