Sie haben keine Artikel im Warenkorb.
Aftermarket focusing lens for Raytools BW101 and Relfar handheld welding guns: 20 mm diameter, 4.75 mm centre thickness (CT), 150 mm focal length. It replaces Raytools part number 3250010444.
The focusing lens brings the parallel beam from the collimator to the welding spot at the nozzle. A burned or pitted focusing lens shows up as weak penetration and a wide, uneven bead at normal settings.
S1 grade fused silica, anti reflection coated on both faces for 1064 nm. Sold singly or in packs of 5. Sold in packs of 5.
| Pack Size | 5 pieces per pack |
| Type | Focusing lens |
| Diameter | 20 mm |
| Centre Thickness | 4.75 mm |
| Focal Length | 150 mm |
| Material | S1 grade fused silica, AR coated both faces |
| Wavelength | 1064 nm fiber lasers |
| Fits | Raytools BW101 and Relfar handheld welding guns |
| Raytools Part Number | 3250010444 |
| Pack Options | 5 pack |
Handheld welding guns
Check the size against the part you are replacing.
| Lens | Specification | Fits | SPM Part Number(OEM no. where one exists) |
|---|---|---|---|
| Relfar / Raytools BW101 focusing D20 x 4.75 F150 | D20 mm, CT 4.75 mm, F150, plano-convex | Relfar handheld, Raytools BW101 | 3250010444(SPM-LAS-2193) |
| Lens | Fits |
|---|---|
| SUP focusing D20 x 4.5 F150 | SUP20S, SUP20T, SUP21T, SUP23S, SUP23T, SW150 |
| SUP focusing D20 x 4.5 F200 | SUP20S, SUP20T, SUP21T, SUP23S, SUP23T, SW150 |
| SUP collimating D20 x 5 F60 | SUP20S, SUP20T, SUP21C |
| SUP collimating D16 x 5 F60 | SUP21T, SUP23S, SUP23T, SW150, SUP22C |
| Qilin / WSX focusing D20 x 3 F150 | Qilin handheld, WSX handheld |
| Qilin / WSX focusing D20 x 3 F120 | Qilin handheld, WSX handheld |
| Qilin / WSX collimating D20 x 3.5 F50 | Qilin handheld, WSX handheld |
Burned focusing lens
Spatter that gets past a dirty protective lens burns the focusing lens. Weak penetration and a wide, uneven bead at normal settings are the signs.
Keeping spares
Lenses are cheap next to downtime. The 5 pack keeps a spare for every gun in the shop.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| Startnow (5 singles) | USD 26.00 | 8 Oct 2026 |
| Spare Part Mart (pack of 5) | USD 18.72 | Today |
Our price of USD 18.72 is approximately 28% less than this seller.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
It fits Raytools BW101 and Relfar handheld welding guns. Match the old lens or its box: D20, CT 4.75, F150. Focusing and collimating lenses are not interchangeable.
No. They are aftermarket lenses made to the same dimensions. The Raytools number 3250010444 is given so you can match your lens.
Yes. Shipping options and costs for your country are shown at checkout.
Prices depend on your ZIP or postcode.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
