OverviewFoot-operated, momentary potentiometer designed for industrial variable-speed motor control. Standard 10 kΩ linear potentiometer in a rugged cast-iron housing with an oversized cast-aluminum shield (O-shield). Not corded; available with auxiliary contacts.
Model and PriceModel: 500-A2HO-10K — Price (US orders): $370.90
Product Details- Switch type: Linear potentiometer, 2 W
- Potentiometer value: 10 kΩ (standard; other values on request)
- Action: Momentary, variable control — treadle rotates potentiometer from zero to selected maximum
- Circuitry: DPDT (Form CC) — 2 auxiliary contacts available
- Cable entry: 3/4"-14 NPT threaded conduit entry (single); special dual and metric entries available on special order
- Housing color: Alert Orange
- Housing material: Cast iron
- Shields & guards: Oversized cast-aluminum shield (O-shield)
- Switch connections: Solder terminals and quick-connect terminals available
- Electrical ratings: 15 A, 125–250 VAC; 1/2 HP at 125–250 VAC
EnclosureNEMA Type 1, 2, 4, 13; UL enclosure Type 1, 2, 4, 13; EN 60529 degree of protection: IP56 standard; IP68 available upon request
PurposeO-shield configuration provides drip-tight, dust-tight, watertight and oil-tight protection suitable for harsh industrial environments
Features & Benefits- Rugged cast-metal enclosure provides stable foot operation and resists sliding during use
- Neoprene cover gasket and O-rings on the actuating shaft for environmental sealing; separate ground screw provided
- Three mounting holes for rigid attachment to floor or equipment
- Selectable maximum resistance for precise speed control
Materials- Treadle and housing: cast iron for high strength and durability
- Shield: heavy cast aluminum
- Finish: painted Alert Orange
- Standard conduit entry: single 3/4"-14 N.P.T. threaded entry
- Designed for use with variable-speed motor drives; available in selected 2 W linear values
- Treadle is spring-loaded and returns to the normal position when foot pressure is removed
- Auxiliary contact: optional SPDT/DPDT auxiliary rated at 15 A, 125–250 VAC
- Switch operation can be arranged to actuate at the beginning of treadle stroke; up to three SPDT switches can be added and adjusted for operation at any point of stroke
Options- Special dual 1/2"-14 N.P.T. conduit entry and metric conduit sizes available to OEMs on special order
- Available potentiometer values: 5 kΩ and 10 kΩ standard; other values by special order
- Available with cast-aluminum base and covers on selected models (unshielded cover is gray iron)
Applications- Benders
- Box markers
- Brakes
- Choppers
- Cleaners
- Closing systems
- Conveyor systems
- Crimping machines
- Cut-off machines for pipe and tubing
- Cutters
- Cutting machines
- Drilling machines
- Drilling tables
- Fabricators
- Filler removal machines
- Folding machines
- Food processing equipment
- Forming systems
- Grinders
- Grinding machines
- Lacers
- Lathes
- Lifts
- Marking systems
- Material handlers
- Microscopes
- Missile launching control systems
- Molding machines
- Nibblers
- Notchers
- Oil drilling rigs
- Platforms
- Positioners
- Potters wheels
- Pullers
- Punching equipment
- Rewind systems
- Riveters
- Roll groovers
- Routers
- Saws
- Sawmills
- Scrap choppers
- Sewer cleaning equipment
- Shears
- Shoe machines
- Shredders
- Space shuttle systems
- Spinners
- Staplers
- Surgical equipment
- Tables
- Testers
- Thread rolling machines
- Threading machines
- Trimming, beading and forming machines
- Beading & forming machines
- Tube-end forming machines
- Tube expansion devices
- Turn/mill centers
- Turners
- Turning centers
- Turntables
- Tying & bundling machines
- Voltage control
- Water cannons
- Welders
- Winding equipment
- Wire drawing systems
Technical specifications- Model: 500-A2HO-10K
- Price (US orders): $370.90
- Switch type: Linear, 2 W
- Potentiometer value: 10 kΩ (selected value)
- Action: Momentary, variable control
- Auxiliary: 2 auxiliary (DPDT / Form CC) available
- Cable entry: 3/4"-14 NPT (standard); special dual and metric available on special order
- Housing: Cast iron; painted Alert Orange
- Shield: Oversized cast-aluminum shield
- Mounting: 3 holes for rigid mounting
- Switch connections: Solder terminal, quick-connect terminal
- Electrical ratings: 15 A, 125–250 VAC; 1/2 HP 125–250 VAC
- Enclosure rating: NEMA 1, 2, 4, 13; IP56 (IP68 upon request)
- Designed for variable-speed motor drives; treadle rotates potentiometer from zero to selected maximum; spring-loaded treadle returns to normal position