McMaster-Carr logo
    Filter by
    Switching Voltage
    Industrial Info Snippet
    Gear Speed Ratio
    Number of Terminals
    Switching Current
    Industrial Info Snippet
    Number of Mounting Holes
    Wire Connection
    Switch Type
    Switch Starting Position
    Enclosure Rating
    Housing Material
    Switch Action
    Switch Designation
    Conduit Connection Gender
    Conduit Thread Type
    Conduit Trade Size
    Industrial Info Snippet
    DFARS Specialty Metals
    Direction of Operation
    Electrical Connection
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    Gender
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Housing Depth
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    4 Products

    Rotary Limit Switches

    Image of Product. Front orientation. Limit Switches. Rotary Limit Switches.
    Start or stop equipment after a set number of rotations to avoid over-rotation. For example, if attached to a crane spool, these switches will stop winding or unwinding cable after a certain number of rotations, preventing damage to equipment. Use their shaft to attach them to rotational equipment. They open and close circuits as fast as snap-acting switches.
    Gear Speed Ratio—Gear speed ratio determines when these switches actuate. A gear speed ratio of 5:1 means they actuate after 5 rotations.
    Housing
    Shaft
    Gear Speed
    Ratio
    No. of Circuits
    Controlled
    Switch Starting
    Position
    Switch
    Action
    Switch
    Designation
    Switching Current @ Voltage
    Max. Voltage
    Operating Temp.
    Range, ° F
    No. of
    Terminals
    Lg.
    Ht.
    Dp.
    Housing
    Material
    Type
    Lg.
    Dia.
    Conduit
    Trade Size
    Enclosure
    Rating
    Each
    Rotary Actuator
     
    Screw-Terminal Wire Connection
    5:121 Off or 1 On
    		Momentary
    		SPDT
    		15 amp @ 250V AC, 0.25 amp @ 250V DC480V AC
    250V DC    		-40 to 18036"2.8"4.5"AluminumKeyed1 1/2"1/2"1/2
    		NEMA 4
    		7821N11000000000
    20:121 Off or 1 On
    		Momentary
    		SPDT
    		15 amp @ 250V AC, 0.25 amp @ 250V DC480V AC
    250V DC    		-40 to 18036"2.8"4.5"AluminumKeyed1 1/2"1/2"1/2
    		NEMA 4
    		7821N1200000000
    40:121 Off or 1 On
    		Momentary
    		SPDT
    		15 amp @ 250V AC, 0.25 amp @ 250V DC480V AC
    250V DC    		-40 to 18036"2.8"4.5"AluminumKeyed1 1/2"1/2"1/2
    		NEMA 4
    		7821N1300000000
    100:121 Off or 1 On
    		Momentary
    		SPDT
    		15 amp @ 250V AC, 0.25 amp @ 250V DC480V AC
    250V DC    		-40 to 18036"2.8"4.5"AluminumKeyed1 1/2"1/2"1/2
    		NEMA 4
    		7821N1400000000
     
    back to top