Pages

▼

San-ei Air Winch

SAN-EI Air Winch 



Pneumatic Winch Product Series

SAN-EI Air Winches are pneumatic lifting and pulling devices driven by compressed air motors. These winches are designed for heavy-duty industrial operations where safety, reliability, and explosion-proof performance are required.

Because the winch operates using compressed air instead of electricity, it can work safely in areas where electrical equipment may pose a risk, such as explosive environments or locations without power supply.

SAN-EI offers a range of W-series air winches, which are compact, lightweight, and easy to operate while providing strong pulling capacity for industrial applications.

1 Main Features

Explosion-Proof Operation

Air winches are powered by compressed air and do not generate sparks, making them suitable for hazardous environments such as chemical plants and oil facilities.

Compact and Portable Design

The winch is designed to be compact and lightweight, allowing easy movement and installation in different working environments.

Reliable Pneumatic Motor

SAN-EI winches use robust radial piston air motors with oil-bath lubrication to ensure durability and stable performance.

Low Air Leakage

The operating section uses poppet valves, which minimize air leakage and improve operational efficiency.

Flexible Speed Control

The air flow from the control valve can be adjusted through the valve handle, allowing smooth control of winch speed.

High Safety Performance

Both manual and automatic systems use band brake mechanisms to ensure safe braking during operation.

Durable Construction

Bearings are fully sealed to prevent oil leakage and ensure long service life.

2 Structure and Working Principle

SAN-EI air winches consist of several main components:

  • Pneumatic air motor

  • Gear reduction mechanism

  • Winch drum

  • Control valve system

  • Brake mechanism

  • Steel rope

Compressed air drives the pneumatic motor, which rotates the gearbox and drum to wind or unwind the steel rope. The operator controls the direction and speed using the control valve.

3 Air Winch Model Series

SAN-EI air winches are mainly classified in the W-series tugger winches, which include different capacity levels.



3.1 Small Capacity Air Winch

MP-W05 Series

Typical model:

MP-W05AA3SACMB
MP-W05AA3SAAB

Specifications:

  • Motor output: about 2.3 hp

  • Capacity: 1100 lbs (500 kg)

  • Line speed: 62 ft/min

  • Rope size: 5/16 in × 145 ft

  • Air consumption: 71 CFM

Applications:

  • light industrial lifting

  • equipment maintenance

  • workshop material handling

3.2 Medium Capacity Air Winch

MP-W10220 Series

Typical models:

MP-W10220SACMB
MP-W10220SAAB
MP-W10220LACMB
MP-W10220LAAB

Specifications:

  • Motor output: 9.6 hp

  • Capacity: 2200 lbs (1 ton)

  • Line speed: 121 ft/min

  • Rope size: 3/8 – 1/2 inch

  • Air consumption: 191 CFM

Applications:

  • construction sites

  • marine equipment

  • mining operations

3.3 Heavy Duty Air Winch

MP-W20220 Series

Typical models:

MP-W20220SACMB
MP-W20220SAAB
MP-W20220LACMB
MP-W20220LAAB

Specifications:

  • Capacity: 4400 lbs (2 tons)

  • Motor power: 9.6 hp

  • Rope size: 7/16 – 1/2 inch

  • Air consumption: 191 CFM

Applications:

  • heavy industrial pulling

  • shipyard operations

  • steel plants

3.4 Large Capacity Air Winch

MP-W3036 Series

Typical models:

MP-W3036SACMB
MP-W3036SAAB
MP-W3036LACMB
MP-W3036LAAB

Specifications:

  • Capacity: 6600 lbs (3 tons)

  • Motor output: 16 hp

  • Rope size: 5/8 inch

  • Air consumption: 318 CFM

These winches are widely used in offshore oil platforms and railway operations.

3.5 Ultra Heavy Duty Air Winch

MP-W5036 Series

Typical models:

MP-W5036SACMB
MP-W5036SAAB
MP-W5036LACMB
MP-W5036LAAB

Specifications:

  • Capacity: 11000 lbs (5 tons)

  • Motor power: 16 hp

  • Rope size: 3/4 inch

  • Line speed: 36 ft/min

Applications:

  • shipbuilding

  • petrochemical industry

  • large equipment handling

3.6 Extra Large Industrial Air Winch

MP-AH45-100 Series

Typical model:

MP-AH45-100-S1H

Specifications:

  • Motor power: 23 hp

  • Capacity: 22000 lbs (10 tons)

  • Rope diameter: 1-1/4 inch

  • Air consumption: 600 CFM

This is a large industrial pneumatic winch for heavy lifting operations.

※給気圧力0.6MPa時
型式ロープ
プル
［ton］		モータ
出力
［kw］		減速比ロープ
スピード
［m/min］		空気消費量
［㎥/min(nor)］		ロープ容量質量
手動ブレーキ		質量
自動ブレーキ
ショート
ドラム
(φmm×m)		ロング
ドラム
(φmm×m)		ショート
ドラム
(kg)		ロング
ドラム
(kg)		ショート
ドラム
(kg)		ロング
ドラム
(kg)
W-050.51.7340.6192.08×458×9055605964
W-1017.1517.3375.410.0×175
12.5×115		10.0×350
12.5×230		257276267288
W-2027.1534.2195.412.5×11512.5×230266287276297
W-30312.0035.6199.016×16016×320470513513527
W-50512.0072.99119.022.4×11522.4×230—850780873

4 Main Industrial Applications

SAN-EI air winches are widely used in industries such as:

  • metal mining

  • shipbuilding

  • construction engineering

  • petrochemical plants

  • heavy machinery manufacturing

  • offshore platforms

They are particularly suitable for hazardous environments where explosion-proof equipment is required.

5 Advantages of Pneumatic Winches

Compared with electric winches, pneumatic winches offer several advantages:

  • explosion-proof operation

  • no electrical sparks

  • safe overload behavior

  • easy speed control

  • reliable operation in harsh environments

These characteristics make them widely used in chemical plants, marine operations, and heavy industry.