Underpinners - Frame Assembly Machines

Semi-Automatic Underpinner

The U-300 is a bench-top, frame joining machine and the most popular model of custom framer, sign and graphic shops. It is compact, well constructed, and built for many years of trouble free operation. The design of the U-300 allows the operator to set the front and back measuring stops for V-Nail insertion. The frame is then moved across the nail head and V-Nails are driven or stacked anywhere along the frame joint. The V-Nail insertion is actuated through the use of a pneumatic pedal.

Frame Joining Capabilities

Moulding Width (min to max) Moulding Height (min to max) Max Distance Between V-Nails (stroke) Pre-set V-Nail Position Stops V-Nail Sizes V-Nail Channel Capacity
¼” up to 3 3/4” (6-60 mm) ¼” up to 3 ¼” (6-80 mm) 3 1/4” (80 mm) Multiple 5, 7,10,12,15 mm (SW-HW-HDF) 220 V-Nails/channel
  • Unique Performance Features
    • Features pneumatic loader to eliminate nail jams
    • “Soft Clamping” pneumatic feature for damage free joints
    • Quick-change, magnetic pad hold down feature fitting most moulding profiles
    • Small table-top footprint needed – 19” (485mm) wide x 18” (456mm) length x 14” (356mm) high
    • Operates only with pneumatic air, no electrical hook-up needed
    • Dual function foot pedal for separate control of mould clamping and V-Nail insertion
    • Designed with a unique, trouble free piston V-Nail driver block-blade system for years of dependable single and multi-stacking operations
Height11 ¾” (300mm)
Width18 ¾” (480mm)
Weight70lbs. (32kg.)
Length11 ¾” (300mm)
Electrical Specifications
Technical Data