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Aftermarket 20 x 2 mm protective lens for Qilin handheld welding guns. The protective lens is the flat window at the front of the gun, between the focusing lens and the weld. It takes the spatter and fume, so it is the part you change most often.
Fused silica, anti reflection coated on both faces for 1064 nm, high power grade. 20 mm across and 2 mm thick. Sold in packs of 10, 20 or 50, with the 50 pack the cheapest per lens.
The matching seal ring is 20.5 x 16 x 2.5 mm, sold separately.
| Size | D20 x 2 mm |
| Material | Fused silica (quartz), AR coated both faces |
| Wavelength | 1064 nm fiber lasers |
| Grade | High power |
| Fits | Qilin handheld welding guns |
| Matching Seal Ring | 20.5 x 16 x 2.5 mm |
| Pack Options | 10, 20 or 50 lenses |
Handheld welding guns
Check the size against the part you are replacing.
| Size | Specification | Fits | SPM Part Number(OEM no. where one exists) |
|---|---|---|---|
| 20 x 2 mm, Qilin | D20 x 2 mm, high power grade | Qilin handheld | SPM-LAS-2178 |
| Size | Fits |
|---|---|
| 18 x 2 mm, SUP / WSX | SUP20S, SUP20T, SUP21T, SUP23S, SUP23T, SW150, WSX handheld |
| 20 x 3 mm, Ospri / Relfar | Ospri handheld, Relfar handheld |
| 20 x 4 mm, Hanwei | Hanwei handheld |
Daily lens changes
A handheld gun throws spatter straight back at the protective lens. Change it at the first dark spot or burn mark; a dirty lens absorbs power, gets hot and cracks.
Protecting the focusing lens
The protective lens is a few cents. The focusing lens behind it costs many times more. A clean protective lens keeps it clean.
Weak or uneven welds
If penetration drops or the weld bead goes uneven at the same settings, check the protective lens before changing power or speed.
Stocking a workshop
Shops running several guns go through lenses fast. The 50 pack keeps every gun supplied at the lowest price per lens.
Found this part cheaper elsewhere? Send us the listing and we will beat it under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
It fits Qilin handheld welding guns. Check the lens in your gun: it should be 20 mm across and 2 mm thick.
No. They are aftermarket fused silica lenses made to the same 20 x 2 mm size. The gun names are given so you can find the right lens.
Yes. Shipping options and costs for your country are shown at checkout.
