SupaWood is PG Bison’s premium quality medium density fibreboard (MDF). It has a fine, smooth, grain-free surface and homogeneous construction, so it’s perfect for creating almost any shape in furniture. And its great machinability means it can be fabricated and installed using most joinery techniques.
To get the most out of your SupaWood, here are a few guidelines.
High-speed, sharp tools and slow feed speeds are the rule of thumb when cutting SupaWood. For the best results, use saw blades that have triple-cut teeth and a rake or hook angle of 5o to 15o. The speed of the saw blade is critical for a clean cut, with the tip speed needing to be between 40 and 60m/s. Saws equipped with scoring blades are even better for preventing edge damage during cutting. Use tungsten-carbide tipped tools wherever possible.
Burn marks can be caused by feed speeds that are too slow or by blunt tools. Edge damage during cutting can be the result of chipped or broken saw blade teeth, off-set (out of alignment) saw blades, non-vertical cut (edge out of square) and resin build-up on the side of the blade. Always apply sufficient pressure to the work piece during cutting and machining to prevent flutter, which can also lead to damage. Scoring blade out of alignment and incorrect types of saw blades can also contribute to damage during cutting.
When nailing SupaWood, stick to machine nailing and resin coated nails of a maximum thickness of 1.8mm, rather than hand nailing. Nailing into the edge of the board should always be more than 30mm from the corner. When nailing into the face, make sure it’s more than 6mm from the edge. If you are stapling, use resin covered staples with pneumatic or percussion stapling machines. Staple in a zig-zag pattern to avoid splitting the edge of the board.
To make the most of SupaWood’s excellent screw holding capabilities, use straight-shanked screws. Tapered screws have a wedging effect and tend to split the edge of the board. SupaWood’s fine fibres form a compact substrate, so it is recommended to drill pilot holes approximately 2mm deeper than the length of the screw. Punched pilot holes reduce holding power, so rather drill the pilot holes.
The pilot hole diameter should be the same as the root diameter, which is the diameter of the screw inside on the thread diameter. Screw diameter should always be less than 7mm. Rather than going with a larger diameter, increase the length of screw. On the edge of the board the screw should always be more than 30mm from the corner of a component. On the face of the board the screw should be more than 7.5mm from the edge
Sanding SupaWood differs from wood, plywood or particleboard. Use high sanding-belt speeds of 1 500 metres per minute. Slow belt speeds will only bend the surface fibres rather than cleanly cutting them off, giving the board a furry appearance and feel. Also look at using resin-bonded abrasives as glue bonded belts have a poor resistance to heat and tend to degrade quickly from heat build-up during sanding.
SupaWood is an interior grade panel and therefore not suitable for exterior applications or use in areas of high humidity and moisture content. SupaWood is sanded to a 150 grit smooth finish, providing a great surface for upgrading, spray painting and PVC wrapping. SupaWood is produced to meet SABS 540:1 – 1991 as well as international standards.