I wanted to have more robust limit switches on my machine. Been through way too many of the micro ones which required tapping the small holes in them that ended up fatiguing the plastic and eventually lead to failure.
These can be NO or NC.
Fully adjustable, the "head" rotates, and the arm can be positioned at any angle, etc.
Full metal construction.
TEMCo ID: CN0045 (3x CN0011)
Type: Fixed Roller Arm
Contact structure: Snap action
Rated current: 5A at 250 VAC, 0.4A at 125VDC
Contact resistance (initial value): Under 15m
Contact material: Silver cadmium oxide
Insulation resistance (initial value):100 MΩ min. (tested at 500VDC)
Voltage (withstanding): Open contacts: 1000V 50/60 Hz 1 min, Between chassis and contacts: 2000V 50/60Hz 1 min
Shock resistance: Free state: under 98m/s² (10 G), Full load state: Under 294 m/s² (30 G)
Vibration resistance: 10 - 55 Hz, 1.5 mm double amplitude
Mechanical Life (overtravel OT): 10,000,000 operations min (on-off frequency of 50 operations/min)
Electrical Life (resistance load): 300,000 operations min. (at full load)m 5,000,000 operations min. (Electromagnetic Contactor loading)
Ambient temperature: -20°C to +60°C (without frost or condensation)
Humidity: Under 95% (about +5 to 20°C)
Max. on-off frequency: 120 operations/min
3 pc TEMCo Fixed Roller Arm Limit Switch CNC Mill Plasma Router Lathe home LOT | eBay