Soldering Products
RESISTANCE SOLDERING
Resistance Soldering generates heat at the solder joint by using low-voltage current. Carbon
electrode holders are connected to an adjustable Luma Power Transformer Unit and applied
to the joint creating instantaneous heat.

The amazing speed of this method is made possible by concentrating heat at the exact area
being soldered. This can increase production rates by up to 40%. The localized heat
generated also reduces excess solder use and drippings resulting in substantial additional
savings.

Operators appreciate the lighter and well-balanced holders as well as the reduced heat
radiation. Rejects and cold joints are eliminated.

Maintenance is practically a thing of the past. The electrodes are long-lived and should
provide an excess of 30,000 contacts each. However, flux must be kept off the contact area for
best results.

Power consumption is reduced. There's no warm-up required; the Power Unit draws current
only when a connection has been made.

SOLDERING INSTRUCTIONS
1. Plug in transformer; turn on.
2. Hook leads up to terminals. (No positive or negative hookup.)
3. Hook up with regard to heat desired: AB=low, BC=medium, AC=high.
4. Use selector switch and start at one (1) through highest number for selection process.
No.551

  • 15 heat stages
  • 900 watts
  • Five-stage selector switch with three secondary
    terminals
  • Voltage range from 1.2 to 4.6, inclusive
  • Red indicator "On" lamp
  • Operates on 120 Volt 60 Hertz (other voltage and
    cycle units may be requested)
  • Dimensions: 6 x 8 x 8
  • Weight: 20 lbs
  • Accessories

No.551P: Complete Package

  • No. 551 Power Unit (1)
  • No. 426 Double Electrode Holder (1)
  • Twelve (12) 1/8" Electrodes
  • No. 726 Plunger Tool (1)
  • 1/4 lb. 47/37 Solder (1)
  • Accessories

No.551-3

  • 9 heat stages
  • 900 watts ABC
  • Primary "On-Off" switch with red indicator "On"
    lamp
  • Operates on 120 Volt, 60 Hertz (other voltage and
    cycle units may be requested)
  • Suitable for continuous duty with .050 to 3/16"
    size holders
  • Dimensions: 6 x 8 x 8
  • Weight: 20 lbs.
  • Accessories
No.626

  • 18 heat stages
  • 1800 watts
  • Primary "On-Off" switch with red indicator "On" lamp
  • Six-stage selector switch with three secondary
    terminals
  • Voltage range from 1.4 to 5.5, inclusive
  • Operates on 120 Volt 60 Hertz (other voltage and
    cycle units may be requested)
  • Maximum electrode size for continuous duty is 3/8"
    diameter
  • Dimensions: 8 x 10 x 10
  • Weight: 25 lbs
  • Accessories
No.631

  • 18 heat stages
  • 2500 watts
  • Primary "On-Off" switch with red indicator "On"
    lamp
  • Six-stage selector switch with three secondary
    terminals
  • Voltage range from 1.9 to 7.2, inclusive
  • Operates on 120 Volt 60 Hertz (other voltage and
    cycle units may be requested)
  • Suitable for continuous duty with any listed
    electrode
  • Dimensions: 8 x 10 x 10
  • Weight: 35 lbs.
  • Accessories
No.631-3

  • 3 heat stages
  • 2500 watts ABC
  • Primary "On-Off" switch with red indicator "On"
    lamp
  • Operates on 120 Volt 60 Hertz (other voltage and
    cycle units may be requested)
  • Suitable for continuous duty with any listed
    electrode
  • Dimensions: 8 x 10 x 10
  • Weight: 35 lbs.
  • Accessories
No.641

  • 30 heat stages
  • 2500 watts
  • Primary "On-Off" switch with red indicator "On" lamp
  • Ten-stage selector switch with three secondary
    terminals
  • Voltage range from 1.8 to 7.6, inclusive
  • Operates on 120 Volt 60 Hertz (other voltage and
    cycle units may be requested)
  • Can operate on a continuous duty cycle with any
    listed electrode
  • Dimensions: 8 x 10 x 10
  • Weight: 35 lbs.
  • Accessories
No.651

  • 10 heat stages
  • 5000 watts
  • Five-stage selector switch
  • Voltage range from 3.0 to 10.0, inclusive
  • Red indicator "On" lamp
  • Operates on 120 and 240 Volts 60 Hertz
  • Heavy-duty machine designed specifically for your
    heavy-duty requirements
  • Dimensions: 8 x 10 x 10
  • Weight: 45 lbs.
  • Accessories
Luma Electric Co.              ph:  419-843-7842
3415 Silica Rd.                    fax:  419-843-7984
Sylvania, OH  43560          email:  lumaelectric@yahoo.com