Li’l Runner Portable Fillet Welding Carriage
Lil Runner - Steelmax -ToolsLil Runner - Steelmax - Tools

Li’l Runner Portable Fillet Welding Carriage

Increase your production and reduce your welding costs with the Li’l Runner Automatic Fillet Welding Carriage. By providing constant, non-stop travel at a regulated speed, Li’l Runner produces consistent high-quality welds in a fraction of the time required by hand welding. The regulated travel speed creates weld bead geometry which is exact to your specifications, reducing costly over welding and decreasing filler metal usage by as much as 60%. Li’l Runner will produce quality welds faster and with less cost than hand welding. At just over 17 lbs (8 Kg), this compact, portable tractor can be carried anywhere.

The Li’l Runner Welding Carriage is available in three unique versions: (i) the standard version (up to 40 IPM); (ii) the high speed version (up to 86 IPM) which can be used for cutting and welding applications; and (iii) the dual power version (battery powered with a line power adapter).  The Li’l Runner family of carriages offer a broad range of capabilities in one of the smallest fillet welders on the market today.


  • Compact, lightweight design with durable cast aluminum housing
  • Positive magnetic traction permits out of position use
  • Magnetic adhesion on/off lever permits easy set up and adjustment on work piece
  • Maintenance-free, 4-wheel planetary gear drive system
  • Digital LED display for presetting of travel speed
  • Rapid clamp torch holder mechanism for different types of MIG/MAG torches
  • Precise cross-slide torch adjustment
  • Integrated automatic arc initiation
  • Self-guiding roller arms eliminate the need for track


  • Increased arc time – no starts and stops
  • Reduce wasted filler metal – eliminates over welding
  • Consistent heat input reduces distortion
  • Precise travel speed and torch angle reduces weld defects and costly rework
  • Improves work environment – reduces fatigue and repetitive stress – removes operator from heat and fumes
SKU: SM-WC-LR; SM-WC-LR-HS; SM-WC-LR-DP Categories: , ,
Li’l Runner Technical Specifications
Power SupplyDual Voltage 120V/230V or battery powered
Welding PositionVertical/Horizontal
Minimum material thickness5/32” (4mm)
Chassis to material clearance5/32” (4 mm)
Travel mechanism4 heat-resistant wheels equipped with magnetic base
Tracking method2 guide rollers
Pulling power22 lbs (10 kg) Vertical 33 lbs (15 kg) Horizontal
Cross slide adjustment: Up-Down Left-Right1.4” (35 mm) 1.4” (35mm)
Guide roller adjustment4” (100 mm)
Control panel: Switch Switch Knob – speed controlPower supply On/Off Start Left, Stop, Start Right 0-43 ipm (0-1000 mm/min)
Dimensions9.6 x 10 x 9.5” (240x258x253 mm)
Weight17.5 lbs (8 kg)
Dual Torch Mount
Enables mounting of second torch for double-sided fillet welding
Product Code: SM-PDT-0466-40-00-00-0
Torch Extension Arm
Enables extended reach for torch placement
Product Code: SM-PRD-0466-43-00-00-0
Edge Following Guide Arms
Enables guiding off an outside edge
Product Code: SM-PRW-0466-41-00-00-0
Adjustable Guide Arms
Enables guiding on lap joints and templates
Product Code: SM-PRW-0466-42-00-00-0
Auxiliary Magnet Blocks
provides additional holding power for out-of-position welding with heavy torch loads
Left - Product Code: SM-BLO-0466-44-01-00-0
Right - Product Code: SM-BLO-0466-45-01-00-0
Flexible Guide Rail
72” long flexible rail for welding on curved surfaces such as storage tanks
Product Code: SM-PRW-0466-50-01-01-0
Flexible Guide Rail Alignment Tool
Quickly aligns the flexible guide rail to the appropriate distance from the joint
Product Code: SM-UST-0466-53-00-00-0
Rail Guide Arms for Li’l Runner (set of 2)
Or use with flexible guide rail
Product Code: SM-PRW-0466-50-02-00-0
Magnet for Flex Rail
Used to attach flexible guide rail to curved surfaces10 required per rail section
Product Code: SM-BLO-0466-50-01-10-0
Quick Connect Torch Holder
Quick connect/release torch holder
Product Code: SM-ZRZ-0466-04-01-00-0

General RFI