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Offset Gear Reducers
Simple, Robust Design with Adjustable Input Shaft Height

Materials of Construction
  • Cast Iron
Design Features

Viking offers three sizes of offset helical gear reducers to reduce standard driver speeds to match pump (or other driven equipment) requirements.  Adjustment slots on the mounting brackets allow the reducers input (high speed) shaft height to swivel to adapt to a variety of motor frames, while the output (slow speed) shaft height corresponds to typical Viking Pump shaft heights.
Performance
Ratios 1.87:1 to 7.95:1 1.87:1 to 7.95:1
Output Speed 780 - 180 (50Hz, 4 pole) 950 - 220 (60Hz, 4 pole)
Power 1.3 - 33.8 kW 2.2 - 49.8 HP
Specifications

60 Hz Motor Speeds

Size

Number of Ratios

Ratio Range

1750 RPM

1150 RPM

HP Range

Output RPM Range

HP Range

Output RPM Range

A

4

2.24:1 to 4.17:1

6.1 - 3.1

780 - 420

4.3 - 2.2

520 - 280

B

8

1.87:1 to 7.65:1

19.0 - 6.4

950 - 230

16.5 - 4.4

640 - 155

C

7

2.21:1 to 7.95:1

49.8 - 18.0

780 - 220

40.1 - 12.6

520 - 145

50 Hz Motor Speeds

Size

Number of Ratios

Ratio Range

1450 RPM

950 RPM

kW Range

Output RPM Range

kW Range

Output RPM Range

A

4

2.24:1 to 4.17:1

3.9 - 2.0

640 - 350

2.7 - 1.3

420 - 230

B

8

1.87:1 to 7.65:1

12.9 - 4.0

780 - 190

11.6 - 2.8

520 - 125

C

7

2.21:1 to 7.95:1

33.8 - 11.3

640 - 180

21.7 - 7.8

420 - 120

Literature

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Model

Drawing

Service Manual

Brochure

Catalog

All A Ratios

Inch

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All B Ratios

Inch

All C Ratios

Inch