Custom Mica Band Heater Form

Backer Marathon Band Heaters are computer-designed and manufactured to your specifications. Only the highest quality materials are used for optimal performance.


  • High temperature oxidation resistant metal sheath
  • Highest grade mica insulation provides excellent electrical insulation at high temperatures and is resistant to moisture.
  • Clamping band is low thermal expansion stainless steel construction designed to maintain clamping pressure at elevated temperatures.
  • Nickel/Chromium resistance wire evenly wound for uniform heat distribution and reliable accuracy.
  • Standard 10” fiberglass lead wires are UL rated and provide protection up to 850 degrees F.
  • Approximately 1/8” thick.

Fill Out the Form Below to Request a Quote:

Mica Band Clamping Strap


  • Low thermal expansion alloy strap to tighten around whole circumference of heater, allowing maximum contact between heater and working surface.
  • 5/8″ strap on heaters greater than 1.50″ wide.
  • 1/2″ strap on heaters less than 1.50″ wide.
  • Standard gap .300″

Mica Band Heater Welded-On Barrel Nuts

Welded On Barrel Nuts

  • Welded on barrel Nuts are optional on any screw or lead termination.
  • Excellent clamping option for heaters with holes or cutouts.
  • No strap to loosen or adjust.
  • Standard Barrel nuts are 3/8” diameter and use a 10-24 socket head cap screw.
  • 5/8” clearance required.

Mica Band Heater Wedge Lock


  • Wedge mount is ideal for low profile clearance and when access is limited.
  • 1/8” clearance required.
  • Min I.D. 1”
  • Min width 1”
  • Standard wedge exit is out each side of gap.

Mica Band Heater with Flange Lock


  • Flange lock up is best for heaters with multiple holes or cut outs.
  • 1/2” clearance required
  • Min. I.D. 1”
  • Min. width 1”

Mica Band Heater Spring Loaded

Spring Loaded Clamping

  • Tig welded barrel nuts.
  • Spring loaded clamping.
  • Retains tight heater fit during start-up.
  • 4″ long bolt (10-24 thread) with 2.25″ long spring.

Mica Band Heater Type L1

Type L1 leads

  • Leads exiting both sides of gap are standard unless otherwise specified.
  • High temperature fiberglass leads are rated to 850°F.
  • Standard lead length is 10 inches.
  • Minimum Diameter: 3/4 inch
  • Minimum Width: 3/4 inch

Mica Band Heater Type L2

Type L2 leads

  • Leads exit 180° from the gap unless otherwise specified.
  • 1.5″ of sleeve protection is standard on lead exits.
  • Minimum Diameter: 1 inch
  • Minimum Width: 1 inch

Mica Band Heater Type L3

Type L3 leads

  • Leads exiting straight out the side are available on any construction.
  • Leads exit through a brass eyelet.
  • Minimum Diameter: 1.50 inch
  • Minimum Width: 3/4 inch

Mica Band Heater Type L4

Type L4 leads

  • Leads may exit at right angle out of cap from any position on the heater.
  • 1.5″ of sleeve protection is standard.
  • Minimum Diameter: 1.25 inch
  • Minimum Width: 1 inch

Mica Band Heater Type L5

Type L5 leads

  • Lead wires on one side of gap are available on any construction.
  • Common exit for small band heaters.
  • Minimum Diameter: 1 inch
  • Minimum Width: 1 inch

Mica Band Heater Type L6

Type L6 leads

  • Stainless steel spring provides extra support, protecting leads from sharp bends.
  • Minimum Diameter: 1.50 inch
  • Minimum Width: .75 inch

Post Terminal

mica band heater with type N1 terminations

Type N1 terminals

  • Post Terminal Vertical position.
  • This is standard position for heaters 2” wide and greater.
  • #10-24 screw thread.
  • Minimum Diameter: 1 inch
  • Minimum Width: 2.75 inch

Mica Band Type N2

Type N2 terminals

  • Post Terminals each side of gap.
  • This is standard position for nozzle heaters and band heaters less than 2” wide.
  • #10-24 screw thread.
  • Minimum Diameter: 1 inch
  • Minimum Width: 1 inch

mica band heater with type N3 terminations

Type N3 terminals

  • Post Terminals Parallel position.
  • #10-24 screw thread.
  • Minimum Diameter: 1 inch
  • Minimum Width: 1 inch

Mica Band Heater Type BN

Type BN terminals

  • Button terminals are useful in low clearance applications.
  • Button terminals may be ordered in same position as N-1, N-2 or N-3.

Two Piece Mica Band Heater

Two Piece

  • Two piece construction is available for easy installation and removal.
  • Please specify total wattage when ordering.
  • Only available on heaters over 3” in diameter.

Mica Band Heater Terminal Box

Terminal Box

  • Terminal boxes are excellent for preventing electrical shock or electrical shorts.
  • Terminals boxes are available on any clamping or construction style.
  • 1.5″ wide x 2.25″ long x 1.87″ deep.

Mica Band Heater Holes and Cutouts

Custom Holes and Cutouts

  • Band heaters can be manufactured with custom holes and cutouts for thermocouples or special mounting needs.
  • Please supply a drawing or sketch for exact hole locations.
  • Specify location in terms of degrees and size of hole.
  • Minimum of 1/2″ is required from the hole to the edge of the heater.

expandable band heater


  • Expandable Mica Heaters allow you to open the heaters to the diameters of the barrel for easy installation.
  • Heaters should only be opened all the way one time.
  • Minimum dimensions for single notch construction:
    • Diameter: 1 inch
    • Width:1 inch
  • ​Minimum dimensions for fully expandable construction:
    • Diameter:1.50 Inch
    • Width: 1.50 inch

mica band heater with euro plug

Euro Plug

  • European type plugs are available upon request
  • Minimum Diameter (Horizontal): 4 inch
  • Minimum Width (Horizontal): 1 inch
  • Minimum Diameter (Vertical): 2 inch
  • Minimum Width (Vertical): 1.50 inch

Mica Band Internal Thermocouple

Internal Thermocouple

  • Internal Type J or Type K thermocouples are available for close temperature monitoring.

Mica Band Heater Ceramic Terminal Covers

Ceramic Terminal Covers

  • Ceramic terminal covers are available

Mica Band Heater Bayonet Adaptor

Bayonet Adapter

  • Bayonet adapter for thermocouples.

Three Phase

  • Three phase construction for high wattage heaters.
  • Minimum Diameter: 2.50 inch
  • Minimum Width: 1.50 width

Dual Voltage

  • Dual voltage wiring allowing the heater to run on either voltage at the same wattage is available on any clamping or termination design.

Ground Lead

  • Ground lead or terminal is available on any design.