Two models for large Steel rod diameter range: .250” to 1.125” (6.4mm to 28.5mm).

Micro-Weld MD-4 and MD-5 Flash Welders are engineered for cost-efficient, high production, very large diameter steel rod processing. They produce consistently high quality welds uniquely formed under heavy upset pressures delivered by a motor driven cam assembly.

The extra heavy-duty transformer is the most stable and cost-efficient available to steel rod producers and processors today.

MD-4 and MD-5 welders have a convenient control station allowing for easy selection of weld modes, flashing speed and heat selection.

The foot controlled individual clamping pedals allow for easy placement and adjustment of material position. The heavy duty clamping mechanism is pneumatically controlled to assure positive positioning and is equipped with cylinders that have long lasting neoprene diaphragms.
Unit of Measure

Welding Size Range

N/A 0.500 to 1.125 inches12.7 to 28.5 mm

Operating Voltages

N/A 480 V600 V

Input Power Cycle

N/A 60 Hz

Line Demand 480 volts (Flash Cycle)

N/A 20 seconds at 70 amps

Line Demand 480 volts (Upset Cycle)

N/A 2 seconds at 450 amps

Line Demand 600 volts (Flash Cycle)

N/A 20 seconds at 60 amps

Line Demand 600 volts (Upset Cycle)

N/A 2 seconds at 360 amps

Single Phase A/C

N/A 216 KVA

Power Contactor Type

N/A Magnetic

Air Requirements

N/A 80-90 PSI 450 cu. in. per weld


N/A 4-caster type wheels

Floor Space

N/A 60 x 37 inches152.4 x 93.98 cm

Height Overall

N/A 50 inches127 cm

Welding Die Height

N/A 43 inches109.22 cm


N/A 2325 lbs1054.60 kg


  • Rugged Construction
  • Easy to Operate Controls
  • Low Maintenance Costs.
  • Dual Foot Controlled Clamping Mechanism
  • Safety Flash Guard System
  • Heavy Duty Adjustable Weld Heat Selection Switch
  • Water Cooled Components
  • Self Contained 120 Volt Safety control Circuits
  • Motor Driven Upset Pressure Mechanism
  • Heavy Duty Straight Slide Movable Headpiece
  • Mounted on Base Unit With Caster Wheels


  • Special voltages
  • Machinist Vise
  • Export Packing
  • 50 Hz Service
  • SCR Controlled Anneal with Automatic IR Sensor
  • Automatic Anneal Timer
  • "V" Type Track Wheels
  • Flat Stock Die Sets
  • CAL Type Anneal Clamps
  • ARM Type Anneal Clamps