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4 1/4" x 2" Shade 10 Lens
Practical answers on choosing, fitting and looking after the small-format shaded, cover and back lenses used in many fixed-shade helmets.
It can, but only with the right eyewear. When eyewear fitted with welding filter lenses is worn under a helmet, the shade in the helmet may be reduced, so long as the combined shade of the eyewear and the helmet lens still equals the value the chart requires.Ordinary tinted safety glasses and sunglasses are not welding filters and do not count towards the shade. Do not reduce the helmet shade unless the eyewear is marked as a welding filter and you have worked it out against a recognised chart for your process and current. Check the helmet and eyewear instructions and your risk assessment. If you are unsure, use the shade the chart gives for the helmet lens alone.
No. The filter lens is there to cut down arc radiation. Eye injuries commonly come from slag, grinding and chipping, so eye protection is recommended even after the arc has stopped. Goggles are also advised when chipping slag or wire-brushing welds.Flip the helmet up for these jobs only if you are wearing suitable impact-resistant eye protection with side protection underneath. Never grind with just a tinted weld lens in front of you unless the maker's instructions and your risk assessment say it is suitable.
Oxy-fuel flames can give off a strong yellow light. During gas welding or cutting where the torch produces a high yellow light, it is desirable to use a filter lens that absorbs the yellow (sodium) part of the spectrum.So a lens made for gas work may be tinted differently from one meant for arc work, even at a similar shade number. Check what the lens is intended for, use the shade the chart gives for your gas process and plate thickness, and follow the maker's instructions.
Replace it as soon as it is cracked, scratched, pitted or covered in spatter to the point that it affects your view. Makers' manuals generally describe the cover lens as a sacrificial layer that protects the filter behind it, so it is the part you will change most often.How quickly it wears depends on how much spatter and grinding dust your work produces. Keep spares to hand, and do not weld without the cover in place, because spatter can pit and crack the shaded filter, which is harder to replace.