Gunatit Electropower Private Limited

• Used to limit maximum upward movement of the hook
• Prevents over-hoisting, which can damage:
  • Wire rope
  • Drum
  • Motor

�� Typically installed near the drum or hook block path

• Rated Voltage: 240V – 500V AC
• DC Voltage: 24V / 110V DC
• Current Rating: 5A – 40A (depends on model)
• Frequency: 50 Hz
• Contact Type:
  • 1NO + 1NC or
  • 2NO + 2NC

• Long travel limit (end of runway)
• Cross travel limit (trolley ends)
• Backup safety limit (hoist)

�� Prevents over-travel and mechanical collision

• Choose heavy-duty (not panel type)
• Prefer roller lever → less wear
• Always use 2 switches (primary + final limit)
• For hoisting → combine with rotary limit switch

Weight Operated Limit Switches are used on control / power circuit of reversing drives so as to limit their rotation / movement within a predetermined position.

Operation:

When the snatch block of the crane reaches its top position the snatch block pushes a plate which is hanging from one end of the lever of the limit switch. Due to the weight placed on the other end of the lever this lever is pushed up. When the lever is pushed up the shaft to which this lever is connected rotates there by rotating the cams which eventually open the contacts and disconnect the motor. The electronic limit switch contacts are automatically reset when the lever returns to zero position due to gravitational force.

Rotary Gear Limit Switch is basically consists of heavy duty worm gear drive. The worm gear unit is built in a cast housing fitted on main body of Limit Switch. The cam shaft which extends from behind the gear in to housing, accommodates the cams adjustable actuators which are fitted on the cams. These actuators strikes the contact finger of respective contacts

Function:

Limit Switch is to stop the mechanism of drive at the extreme clock wise / anti clock wise position. These rotary limit switches are particularly suited for use on reversing drives such as electric hoists, winches, over head cranes and traverse.

Application:

Rotary geared type limit switches are suitable for use reversing drives such as hoists, winches, rolling mills and various other mechanisms used such used in steel plants such as coke oven and feeding machinery.

Application:

The new range of limit switches has been designed and manufactured according to safety standard are suitable for use on reversing drives such as hoists, cranes, winches and rolling mills.

Design:

The driving motion is transmitted by worm gear. All gears and hubs are made of low wear thermoplastic. The rotational movements are transmitted to switches by adjustable cams.

Driving cams:

Each lever has a single micro metric resister screw. This screw exclusively works on its own combined lever, excluding any mechanical contact with any other next to it. The regulation is easily made by use of screwdriver on a register screw. The special friction system assures a rapid and precise adjustment.

Technical Data:

• Body Material : Black Nylon
• Cover Material Yellow : Impact proof thermoplastic
• Protection Degree : IP-55
• Mounting Position : Any
• Gear Ratios : 1:12.5, 1:25, 1:50, 1:100, 1:200 & 1:400
• Drive : Worm Drive
• Cable Entries : 2, 3/4" Conduit
• Maximum Rotation Speed : 1200 rpm
• Contact Material : Double break silver cadmium
• Wire Connection : Screw terminal
• Rated Voltage Insulation : 500 V.A.C
• Thermal Test Current : 10 Amps

• Contains six cam operated switch elements
• Used as auxiliary circuit limit switches.
• The switch has two shafts which must be driven by the holding and closing winches.

Additional Information:

• Item Code: EPGRLS01
• Production Capacity: 100 PM
• Delivery Time: 1 WEEK
• Packaging Details: CARTOON PACKING

Fg Worm Drive Limit Switch

Application:

The new range of limit switches has been designed and manufactured according to safety standard are suitable for use on reversing drives such as hoists, cranes, winches and rolling mills.

Design:

The driving motion is transmitted by worm gear. All gears and hubs are made of low wear thermoplastic. The rotational movements are transmitted to switches by adjustable cams.

Driving cams:

Each lever has a single micro metric resister screw. This screw exclusively works on its own combined lever, excluding any mechanical contact with any other next to it. The regulation is easily made by use of screwdriver on a register screw. The special friction system assures a rapid and precise adjustment.

Technical Data:

• Body Material : Black Nylon
• Cover Material Yellow : Impact proof thermoplastic
• Protection Degree : IP-55
• Mounting Position : Any
• Gear Ratios : 1:12.5, 1:25, 1:50, 1:100, 1:200 & 1:400
• Drive : Worm Drive
• Cable Entries : 2, 3/4" Conduit
• Maximum Rotation Speed : 1200 rpm
• Contact Material : Double break silver cadmium
• Wire Connection : Screw terminal
• Rated Voltage Insulation : 500 V.A.C
• Thermal Test Current : 10 Amps

Application:

The new range of limit switches has been designed and manufactured according to safety standard are suitable for use on reversing drives such as hoists, cranes, winches and rolling mills.

Design:

The driving motion is transmitted by worm gear. All gears and hubs are made of low wear thermoplastic. The rotational movements are transmitted to switches by adjustable cams.

Driving cams:

Each lever has a single micro metric resister screw. This screw exclusively works on its own combined lever, excluding any mechanical contact with any other next to it. The regulation is easily made by use of screwdriver on a register screw. The special friction system assures a rapid and precise adjustment.

Technical Data:

• Body Material : Black Nylon
• Cover Material Yellow : Impact proof thermoplastic
• Protection Degree : IP-55
• Mounting Position : Any
• Gear Ratios : 1:12.5, 1:25, 1:50, 1:100, 1:200 & 1:400
• Drive : Worm Drive
• Cable Entries : 2, 3/4" Conduit
• Maximum Rotation Speed : 1200 rpm
• Contact Material : Double break silver cadmium
• Wire Connection : Screw terminal
• Rated Voltage Insulation : 500 V.A.C
• Thermal Test Current : 10 Amps

Fg Worm Drive Limit Switch

Application:

The new range of limit switches has been designed and manufactured according to safety standard are suitable for use on reversing drives such as hoists, cranes, winches and rolling mills.

Design:

The driving motion is transmitted by worm gear. All gears and hubs are made of low wear thermoplastic. The rotational movements are transmitted to switches by adjustable cams.

Driving cams:

Each lever has a single micro metric resister screw. This screw exclusively works on its own combined lever, excluding any mechanical contact with any other next to it. The regulation is easily made by use of screwdriver on a register screw. The special friction system assures a rapid and precise adjustment.

Technical Data:

• Body Material : Black Nylon
• Cover Material Yellow : Impact proof thermoplastic
• Protection Degree : IP-55
• Mounting Position : Any
• Gear Ratios : 1:12.5, 1:25, 1:50, 1:100, 1:200 & 1:400
• Drive : Worm Drive
• Cable Entries : 2, 3/4" Conduit
• Maximum Rotation Speed : 1200 rpm
• Contact Material : Double break silver cadmium
• Wire Connection : Screw terminal
• Rated Voltage Insulation : 500 V.A.C
• Thermal Test Current : 10 Amps

Application:

The new range of limit switches has been designed and manufactured according to safety standard are suitable for use on reversing drives such as hoists, cranes, winches and rolling mills.

Design:

The driving motion is transmitted by worm gear. All gears and hubs are made of low wear thermoplastic. The rotational movements are transmitted to switches by adjustable cams.

Driving cams:

Each lever has a single micro metric resister screw. This screw exclusively works on its own combined lever, excluding any mechanical contact with any other next to it. The regulation is easily made by use of screwdriver on a register screw. The special friction system assures a rapid and precise adjustment.

Technical Data:

• Body Material : Black Nylon
• Cover Material Yellow : Impact proof thermoplastic
• Protection Degree : IP-55
• Mounting Position : Any
• Gear Ratios : 1:12.5, 1:25, 1:50, 1:100, 1:200 & 1:400
• Drive : Worm Drive
• Cable Entries : 2, 3/4" Conduit
• Maximum Rotation Speed : 1200 rpm
• Contact Material : Double break silver cadmium
• Wire Connection : Screw terminal
• Rated Voltage Insulation : 500 V.A.C
• Thermal Test Current : 10 Amps

Rotary Gear Limit Switch is basically consists of heavy duty worm gear drive. The worm gear unit is built in a cast housing fitted on main body of Limit Switch. The cam shaft which extends from behind the gear in to housing, accommodates the cams adjustable actuators which are fitted on the cams. These actuators strikes the contact finger of respective contacts

Function:

Limit Switch is to stop the mechanism of drive at the extreme clock wise / anti clock wise position. These rotary limit switches are particularly suited for use on reversing drives such as electric hoists, winches, over head cranes and traverse.

Application:

Rotary geared type limit switches are suitable for use reversing drives such as hoists, winches, rolling mills and various other mechanisms used such used in steel plants such as coke oven and feeding machinery

• Contains six cam operated switch elements
• Used as auxiliary circuit limit switches.
• The switch has two shafts which must be driven by the holding and closing winches.

Additional Information:

• Item Code: EPGRLS01
• Production Capacity: 100 PM
• Delivery Time: 1 WEEK
• Packaging Details: CARTOON PACKING

Pvc Worm Drive Plastic Limit Switch

Application:The new range of limit switches has been designed and manufactured according to safety standard are suitable for use on reversing drives such as hoists, cranes, winches and rolling mills.

Design:

The driving motion is transmitted by worm gear. All gears and hubs are made of low wear thermoplastic. The rotational movements are transmitted to switches by adjustable cams.

Driving cams:

Each lever has a single micro metric resister screw. This screw exclusively works on its own combined lever, excluding any mechanical contact with any other next to it. The regulation is easily made by use of screwdriver on a register screw. The special friction system assures a rapid and precise adjustment.

Technical Data:

• Body Material : Black Nylon
• Cover Material Yellow : Impact proof thermoplastic
• Protection Degree : IP-55
• Mounting Position : Any
• Gear Ratios : 1:12.5, 1:25, 1:50, 1:100, 1:200 & 1:400
• Drive : Worm Drive
• Cable Entries : 2, 3/4" Conduit
• Maximum Rotation Speed : 1200 rpm
• Contact Material : Double break silver cadmium
• Wire Connection : Screw terminal
• Rated Voltage Insulation : 500 V.A.C
• Thermal Test Current : 10 Amps

Gravity Limit Switch are used on control / power circuit of reversing drives so as to limit their rotation / movement within a predetermined position.

Operation:

When the snatch block of the crane reaches its top position the snatch block pushes a plate which is hanging from one end of the lever of the limit switch. Due to the weight placed on the other end of the lever this lever is pushed up. When the lever is pushed up the shaft to which this lever is connected rotates there by rotating the cams which eventually open the contacts and disconnect the motor. The electronic limit switch contacts are automatically reset when the lever returns to zero position due to gravitational force.

Application:

The new range of limit switches has been designed and manufactured according to safety standard are suitable for use on reversing drives such as hoists, cranes, winches and rolling mills.

Design:

The driving motion is transmitted by worm gear. All gears and hubs are made of low wear thermoplastic. The rotational movements are transmitted to switches by adjustable cams.

Driving cams:

Each lever has a single micro metric resister screw. This screw exclusively works on its own combined lever, excluding any mechanical contact with any other next to it. The regulation is easily made by use of screwdriver on a register screw. The special friction system assures a rapid and precise adjustment.

Technical Data:

• Body Material : Black Nylon
• Cover Material Yellow : Impact proof thermoplastic
• Protection Degree : IP-55
• Mounting Position : Any
• Gear Ratios : 1:12.5, 1:25, 1:50, 1:100, 1:200 & 1:400
• Drive : Worm Drive
• Cable Entries : 2, 3/4" Conduit
• Maximum Rotation Speed : 1200 rpm
• Contact Material : Double break silver cadmium
• Wire Connection : Screw terminal
• Rated Voltage Insulation : 500 V.A.C
• Thermal Test Current : 10 Amps

• Mounted on crane bridge end carriage
• A fixed stopper/striker is installed on runway beam
• When crane reaches end:
  • First stage → slow down signal
  • Second stage → complete stop

• Mounted on trolley frame
• Striker plate is fixed on girder
• Prevents trolley from hitting end stops

👉 Crossbar switches are often used for two-step protection (slow + stop)