Window and door fabrication uses a line of machines: a double mitre saw to cut the profile, a welder to join uPVC corners, a corner cleaner to remove the weld bead, and routers and machining centres to prepare the frames for hardware. Used machines from this line are common, and the right choice depends on the profile systems you work with and the volume you make.
Before you view
- Material. uPVC and aluminium use different machines. Check the machine is made for the material you cut or weld.
- Profile compatibility. Welders and cleaners use tooling and fixtures shaped to a profile system. Ask which profiles the machine has been set up for and whether the tooling comes with it.
- Power and air. Most of these machines need three-phase power and compressed air. Check what each machine needs against your workshop.
- Spares and support. Ask who made it and whether parts such as blades, heater plates and cutters are still available.
Double mitre saws
- Check the blades, the blade guards and the clamps. The blades should be sharp and the cut face clean.
- Check the saw head moves smoothly and the angle settings lock at 45 and 90 degrees.
- Cut a sample piece and check the angles with a square. A saw that does not cut true will produce frames that do not close.
Welding machines
- Check the heater plates for damage, and that the non-stick coatings or sheets are intact.
- Check the temperature control and that the plates reach and hold the temperature set.
- Check the clamps, the alignment and the pressure settings, and that the movement is smooth.
- Ask for a welded sample. Look at the weld bead for an even, full bead along the joint.
Corner cleaners
- Check the cutters and the knives for wear, and that spare cutters are available for your profile.
- Run a welded frame through and check the corner is cleaned without damage to the surface of the profile.
- Check the dust and waste extraction, since the machine produces a lot of swarf.
Routers and machining centres
- Check the spindle for noise and play, and the cutters for wear.
- On a CNC machine, check the controller, the software and the backups of the programs.
- Check the machine cuts to size by machining a test piece and measuring it.
Check the finished frame
Whatever machine you buy, ask to see a finished frame made on it. Measure the two diagonals of the frame. If they are equal the frame is square. Check the corners for gaps and the sashes for fit.
Safety and transport
- Check the guards, safety interlocks and emergency stops work. Read the guide to PUWER and second-hand machinery.
- A saw or welder is heavy and needs dismantling or specialist moving. Read the guide to transporting used machinery.
Summary: buying used window and door machinery
Check the profile compatibility and tooling, test the cut and the weld, measure a finished frame, and check that spares are available. Then browse used window and door machinery, including double mitre saws and corner cleaning machines, or read the guide to what to check when buying used machinery.
Used aluminium window machinery for sale
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