A double head cutting saw can prepare both ends of an aluminium frame or sash component in one machine setup. But choosing a saw by blade diameter or maximum cutting length alone can lead to an expensive mismatch. The right starting point is your profile drawing, angle requirement and daily cutting list.
1. Separate standard frame cutting from variable-angle work
If most orders use standard mitred frame joints, compare saws designed for those cuts first. If you manufacture angled windows, architectural frames or other non-standard components, ask about variable-angle capability. Confirm the available angle range, how each head moves and whether angle positioning is manual or controlled.
The Smatech profile cutting saw catalogue includes inward- and outward-cutting 45-degree models as well as variable-angle double-head saws. These configurations are not interchangeable simply because they use similar-sized blades. Send a drawing showing which face is the reference face and the required cut direction.
2. Check capacity at the actual cutting angle
A section that fits at a square cut may not fit at a mitre angle. Ask for the cutting envelope at every required angle, with the intended clamps and supports in place. Check profile width and height together: two separate maximum figures do not necessarily describe a rectangle that the saw can cut in every orientation.
For example, the catalogue lists a cutting-length range of 490–6000 mm for the LJB2H-CNC-600*6000 and 560–5000 mm for the LJB2E-CNC-600*5000. Treat these as catalogue starting points, not proof of suitability for your section. Confirm how finished length is measured and whether short pieces require a different setup.
3. Evaluate cut quality on your own profiles
For window production, a useful acceptance sample is a complete set of frame components, not just one attractive cut. Agree how to check finished length, angle, burrs, surface marking and assembled corner fit. Include the thinnest-walled, largest and most frequently used profiles in the test.
Blade selection, tooth geometry, feed settings, lubrication, support and clamping all influence the result. Have the supplier recommend the tooling and operating settings for your material. Operators should follow the machine manual and safety procedures; guards and interlocks must not be bypassed to accommodate a difficult section.
4. Measure useful output, including changeovers
Compare machines using the same cutting list. Ask for a timed demonstration that includes loading, length and angle changes, cutting, unloading and part identification. A fast blade movement alone is not the same as a high number of finished components per shift.
If you plan to transfer cutting lists from office software, verify supported file formats and test an actual file before purchase. Confirm whether optimisation, label printing and software licences are included, optional or unavailable. Do not assume that “CNC” means compatibility with your existing software.
5. Compare the complete installation package
- Electrical supply, compressed air where required, and local installation arrangements.
- Machine footprint plus clearance for loading and unloading long profiles.
- Included blades, supports, clamps and consumables.
- Training, maintenance instructions, spare parts and warranty scope.
- Agreed sample tests and the method used to verify the finished dimensions.
What should you send with an enquiry?
Prepare profile cross-sections, material details, stock lengths, finished lengths, cutting angles, daily quantities and local power requirements. Include examples of unusual joints rather than describing everything as “standard aluminium windows”.
Send your cutting requirements to Smatech for a configuration review. For planning the rest of the line, read our window and curtain wall machinery selection guide. Final capacity and configuration should be confirmed against your drawings and the written quotation.