Geared Rotary Limit Switch for EOT Cranes in India.



Standard Gear Ratio:
Plastic FG : 1:50, 1:100, 1:200, 1:400.

Sheet Metal/Aluminium Cast : 1:48 , 1:60 , 1: 96
Customized gear ratios for Rotary Limit Switch are also available.



Manufacturer and Supplier of FG Rotary Geared Limit Switch for Industrial Cranes

FG Rotary Geared Limit Switch

Working principle of rotary limit switch

A rotary limit switch works on the principle of a worm drive . A worm drive mechanism is suited so that enough torque is generated to move the attached gears within the limit switch .
the shaft of the limit switch has threads which are matches and attached to a helical gear.

As the shaft rotates , the gear rotates according to the gear ratio. The gears are attached to a cam mechanism which rotate along with the central gear, a rotary limit switch has a minimum of two cams , one for setting the upper limit of the hoist machinery and one for setting the lower limit of the hoist machinery .

Screws are provided for each cam .Each cam can be adjusted according to user requirements to fine tune the upper and lower limit these cams operate the contacts within the limit switch.

After the cam adjustment is done according to the user , as soon as the hoist machinery reaches the upper vertical limit, the cams operate the contacts which stop the moving machinery . The contacts can be of normal closed (NC) or normally open (NO) type. Once any limit is reached by the EOT crane , the crane will only be able to move in the opposite direction thus preventing an accident.

Rotary Limit Switch Working Principle

Rotary Limit Switches are designed from the ground up for harsh Industrial Use.

Many Different models are available

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FG50/SH/2 50:1,Contacts-2nos

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FG50/SH/4 50:1,Contacts-4nos

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FG100/SH/2 100:1,Contacts-2nos

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FG100/SH/4 100:1,Contacts-4nos

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FG200/SH/2 200:1,Contacts-2nos

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FG200/SH/4 200:1,Contacts-4nos

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FG400/SH/2 400:1,Contacts-2nos

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FG400/SH/4 400:1,Contacts-4nos

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GRLS/48/SH/2 48:1,Contacts-2nos

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GRLS/48/SH/4 48:1,Contacts-4nos

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GRLS/60/SH/2 60:1,Contacts-2nos

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GRLS/60/SH/4 60:1,Contacts-4nos

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GRLS/96/SH/2 96:1,Contacts-2nos

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GRLS/96/SH/4 96:1,Contacts-4nos

Aluminium Die cast Rotary geared limit Switch.
Manufactured for Strength & Reliability

Aluminium Die Cast Rotary Limit Switch

Product List of Rotary Geared

Sr. no. Product Name Description Part Number Images
1 GRLS 48 Ratio 2C IP41 ROTARY GEARED LIMIT SWITCH WITH THE GEAR RATIO 48, 02 CONTACT, 1NO + 1NC GRLS/48/SH/2/41
18 Kg Thruster
2 GRLS 48 Ratio 4C IP41 ROTARY GEARED LIMIT SWITCH WITH THE GEAR RATIO 48, 04 CONTACT, 2NO + 2NC GRLS/48/SH/4/41
18 Kg Thruster
3 GRLS 60 Ratio 2C IP41 ROTARY GEARED LIMIT SWITCH WITH THE GEAR RATIO 60, 02 CONTACT, 1NO + 1NC GRLS/60/SH/2/41
18 Kg Thruster
4 GRLS 60 Ratio 4C IP41 ROTARY GEARED LIMIT SWITCH WITH THE GEAR RATIO 60, 04 CONTACT, 2NO + 2NC GRLS/60/SH/4/41
18 Kg Thruster
5 GRLS 96 Ratio 2C IP41 ROTARY GEARED LIMIT SWITCH WITH THE GEAR RATIO 96, 02 CONTACT, 1NO + 1NC GRLS/96/SH/2/41
18 Kg Thruster
6 GRLS 96 Ratio 4C IP41 ROTARY GEARED LIMIT SWITCH WITH THE GEAR RATIO 96, 04 CONTACT, 2NO + 2NC GRLS/96/SH/4/41
18 Kg Thruster
7 GRLS 48 Ratio 2C IP55 ROTARY GEARED LIMIT SWITCH WITH THE GEAR RATIO 48, 02 CONTACT, 1NO + 1NC GRLS/48/SH/2/55
18 Kg Thruster
8 GRLS 48 Ratio 4C IP55 ROTARY GEARED LIMIT SWITCH WITH THE GEAR RATIO 48, 04 CONTACT, 2NO + 2NC GRLS/48/SH/4/55
18 Kg Thruster
9 GRLS 60 Ratio 2C IP55 ROTARY GEARED LIMIT SWITCH WITH THE GEAR RATIO 60, 02 CONTACT, 1NO + 1NC GRLS/60/SH/2/55
18 Kg Thruster
10 GRLS 60 Ratio 4C IP55 ROTARY GEARED LIMIT SWITCH WITH THE GEAR RATIO 60, 04 CONTACT, 2NO + 2NC GRLS/60/SH/4/55
18 Kg Thruster
11 GRLS 96 Ratio 2C IP55 ROTARY GEARED LIMIT SWITCH WITH THE GEAR RATIO 96, 02 CONTACT, 1NO + 1NC GRLS/96/SH/2/55
18 Kg Thruster
12 GRLS 96 Ratio 4C IP55 ROTARY GEARED LIMIT SWITCH WITH THE GEAR RATIO 96, 04 CONTACT, 2NO + 2NC GRLS/96/SH/4/55
18 Kg Thruster
13 FG50P2 FG WORM DRIVE ROTARY GEAR LIMIT SWITCH WITH THE GEAR RATIO 50, 02 CONTACT FG 50 P2
18 Kg Thruster
14 FG50P4 FG WORM DRIVE ROTARY GEAR LIMIT SWITCH WITH THE GEAR RATIO 50, 04 CONTACT FG 50 P4
18 Kg Thruster
15 FG100P2 FG WORM DRIVE ROTARY GEAR LIMIT SWITCH WITH THE GEAR RATIO 100, 02 CONTACT FG 100 P2
18 Kg Thruster
16 FG100P4 FG WORM DRIVE ROTARY GEAR LIMIT SWITCH WITH THE GEAR RATIO 100, 04 CONTACT FG 100 P4
18 Kg Thruster
17 FG200P2 FG WORM DRIVE ROTARY GEAR LIMIT SWITCH WITH THE GEAR RATIO 200, 02 CONTACT FG 200 P2
18 Kg Thruster
18 FG200P4 FG WORM DRIVE ROTARY GEAR LIMIT SWITCH WITH THE GEAR RATIO 200, 04 CONTACT FG 200 P4
18 Kg Thruster
19 FG400P2 FG WORM DRIVE ROTARY GEAR LIMIT SWITCH WITH THE GEAR RATIO 400, 02 CONTACT FG 400 P2
18 Kg Thruster
20 FG400P4 FG WORM DRIVE ROTARY GEAR LIMIT SWITCH WITH THE GEAR RATIO 400, 04 CONTACT FG 400 P4
18 Kg Thruster
21 FG12.5P4 FG WORM DRIVE ROTARY GEAR LIMIT SWITCH WITH THE GEAR RATIO 12.5, 04 CONTACT FG 12.5 P4
18 Kg Thruster

Applications of Rotary Limit Switch

Rotary Limit Switches are used whenever you need to count the angle or number of rotations and stop a rotating piece of equipment when it reaches it rotating limit.

EOT Cranes

Electric Hoists

Gantry Cranes

Goliath Cranes

Mobile Cranes

Tower Cranes

Image Description
Image Description

Anand FG Rotary Geared Limit Switch Technical Data Specifications

FG Rotary Limit Switch
Body Black Nylon
Material Cover Shock Resistance Thermoplastic
Protection Degree IP-55 Confirming to IS-13947(Part-1)1993 :Dust ingress and protect against low pressure water jet from any direction.
Gear Ratio 1:12.5, 1:25, 1:50,1:100 & 1:400
Drive Worm Screw
Cable Entries 2, 3/4 Conduit
Rated Voltage Insulation 500 VAC.
Thermal Test Current 10Amps
Maximum Speed 1200 rpm
Wire Connection Screw Terminal