There are two main types of power sanders used in the workshop shed, the belt sander and the orbital sander. The belt sander uses a cloth backed sanding belt, usually of course grade, for rapidly removing stock. The orbital sanders have a backing pad that spins rapidly and is used in fine finishing work.
Belt Sander
This sander should be used with great care as it can easily dig into the surface, leaving deep scour marks. The most important feature to look for is efficient dust extraction, as large amount of dust is created. A dust collector bag is essential but a dust extractor unit in the workshop shed is even better. Different models of belt sanders use belts of different sizes and their are no common standard sizes so it is a good idea to check to see if the belt size you need is widely available.
Key feature of a belt sander are:
- Two speed or variable speed motor to suit different surfaces.
- Automated tracking control to keep the belt running smoothly.
Orbital Sander
The orbital sander is more useful in the workshop shed than a belt sander for general use. The sanding action is less severe, and by using progressively finer grades of paper a fine finish can be achieved. Three common sizes of sanders are available:half sheet, one-third sheet and quarter sheet.These denote the size of sand paper that needs cutting from a standard sheet thus avoiding waste.
Key features of a orbital sander are:
- Effective dust collection pouch
- Perforated base and sanding sheets that prevent dust from collecting under the sander.
- Quick release clips for changing sanding sheets.
- Variable speed for delicate work.
Random Orbit Sander
This is a versatile tool combining two functions in one. Hold the sander lightly and the circular sanding disc spins in a circular motion for the rapid removal of rough surfaces. Apply more pressure and the action changes to a reciprocating orbital motion for finer finishing.
Palm Sander
This allow one handed operation and is not suitable for heavy work, but it is ideal for a light touchto produce a fine finish.The sanding base vibrates at a higher speed than a large orbital sander. It takes quarter sheet of standard sized sandpaper, and as with larger models, a dust collection pouch is available.
Multi-function Sanders
When intricate modelling and restoration work is required in the workshop shed, a family of sanders with specially shaped sander pads are worth considering. Delta sanders have a triangular base ideal for reaching into the corners of panels. Self adhesive sanding sheets can be changed quickly without clips, but are more expensive.
