Nexthermal Hotlock Coil Heater

Introducing the next generation Hotlock mini coil heater. The new design utilizes a positive locking positioning ring and machined components to reduce manufacturing complexity. Installation is easy with a twist of the end cap ring the heater is secured into position on the nozzle, and with the integrated thermocouple slot located under the cap the thermocouple is precisely located. No tools are required for installation or removal.
Nexthermal’s proven mini coil technology is at the heart of the Hotlock. This Hotlock design protects the mini coil heater with an inside, outside stainless sheath and enclosed end rings for superior durability. Standard IDs of 0.75-in. and 0.87-in. will be stocked with standard lengths, voltage, and wattages. Custom build to order Hotlocks can be manufactured in 2 weeks or less. Nexthermal will develop custom inside diameter Hotlocks for major OEM opportunities.

Standard Hotluck Heaters  

*Wattage capabilities depend on size of heater, contact Nexthermal for design assistance

Build-to-Order Hotlock

Diameter Width Minimum Width Maximum  Wattages Voltage Max
0.75-in.  30 mm 210 mm 100-450W* 240V


Hotlock Stock List

Part Number Diameter Width Watts Volts
HL30220 0.75-in. 30 mm 220W 240V
HL30268 0.75-in. 30 mm 268W 240V
HL30350 0.75-in. 30 mm 350W 240V
HL40220 0.75-in. 40 mm 220W 240V
HL40350 0.75-in. 40 mm 350W 240V
HL50220 0.75-in. 50 mm 220W 240V 
HL50350 0.75-in. 50 mm 350W 240V 
HL60220 0.75-in. 60 mm 220W 240V 
HL60400 0.75-in. 60 mm 400W 240V 
HL70220 0.75-in. 70 mm 220W 240V 
HL70400 0.75-in. 70 mm 400W 240V 
HL80220 0.75-in. 80 mm 220W 240V 
HL80400 0.75-in. 80 mm 400W 240V 
HL90220 0.75-in. 90 mm 220W 240V 
HL90400 0.75-in. 90 mm 400W 240V 
HL100220 0.75-in. 100 mm 220W 240V 
HL100400 0.75-in. 100 mm 400W 240V 
HL110220 0.75-in. 110 mm 220W 240V 
HL110400 0.75-in. 110 mm 400W 240V 
HL130220 0.75-in. 130 mm 220W 240V 
HL130400 0.75-in. 130 mm 400W 240V 
HL150220 0.75-in. 150 mm 220W 240V 
HL150400 0.75-in. 150 mm 400W 240V 
HL170220 0.75-in. 170 mm 220W 240V 
HL170450 0.75-in. 170 mm 450W 240V 
HL190220 0.75-in. 190 mm 220W 240V 
HL190450 0.75-in. 190 mm 450W 240V 
HL210220 0.75-in. 210 mm 220W 240V 
HL210450 0.75-in. 210 mm 450W 240V 


Nexthermal Advantage

  • Positive locking positioning
  • Anti-seize coating for ease of removal
  • Replaceable external thermocouple
  • Profiled for more heat at the tip

Technical Data Applications

  • Heater Sheath: CrNi Steel
  • High Voltage Stability: 800 VAC
  • Insulation Resistance: >= 5M Ohm at 500 VDC (cold)
  • Leakage Current: <= 0.5 mA at 250 VAC (cold)
  • Wattage Tolerance: +/- 2%, +/- 4%, or +/- 10%
  • Maximum Voltage: 250 V
  • Standard Connection: 72-in. Teflon to 500º F


  • High Cavitation 
  • Caps and Closures
  • Plastic Molding for the Cosmetic Industry