Why gap tolerance is a machine-selection question
Handheld laser welding concentrates energy into a relatively small working zone. Shops with variable fit-up may depend more heavily on wobble width, filler-wire strategy, joint design and operator/process controls than shops with consistent laser-cut parts.
Do not turn one vendor number into a universal rule
Some manufacturers publish a “weld requirement” or gap figure for a specific platform. Those values should stay attached to that model and test context. They are not a universal maximum gap for all 1200W or 1500W laser welders.
A practical pre-purchase test
If your production has meaningful gap variability, send representative coupons or drawings to the manufacturer and ask for documented sample results before purchase.
Frequently asked questions
Can filler wire solve every laser-welding gap problem?
No. Filler wire can expand the process window for some joints, but machine capability, feed control, joint geometry and acceptance criteria still matter.
Should I choose more wattage for bad fit-up?
Not automatically. More power does not correct poor joint preparation by itself. Fit-up, wobble, filler, travel and the machine’s validated process window all matter.
Checked August 26, 2026. Prices, stock, shipping and policies change. We preserve uncertainty where a manufacturer does not publish a specific value.