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Add lens tissue: $8.55 5% off with this part
Powder-Free Anti-Static Finger Cots for Handl...: Replacement protective window cap for the QBH output head of Raycus fiber laser sources. It screws onto the end of the output head and seals the fibre end face behind a coated quartz window, so dust and back reflections hit a cheap window instead of the fibre.
This one is the silver D12.8 x H16 mm cap: straight body, 12.8 mm across and 16 mm high. Raycus uses several window caps of different heights and finishes on different sources and power levels, so measure the cap you are replacing (diameter and height) and compare it with the photo before ordering.
Sold singly. It is a replacement part, not an original from the laser maker.
| Fits | Raycus QBH output heads that take the 12.8 x 16 mm window (0 to 3 kW sources) |
| Part | QBH output head protective window cap (window in a threaded holder) |
| Outside diameter | 12.8 mm |
| Height | 16 mm |
| Body | Silver finish, straight body |
| Window | Coated quartz, 1064 nm |
| Sold as | 1 cap |
| Stat. HS-Code | 900290 |
| Country of Manufacture | China |
| Trademark | Raycus is a trademark of its owner. Names are for reference only; this is a replacement part, not made or approved by Raycus. |
Raycus
| Dimensions | Raycus Part No.(SPM Part No.) | Fits |
|---|---|---|
| Silver, 12.8 mm diameter, 16 mm high | No Raycus equivalent(SPM-LAS-4960-D128XH16) | Raycus |
Burnt or pitted window
The window is the last optic before the beam leaves the source. A speck of dust or a back reflection burns a spot into it, power drops and the spot grows. Swap the cap as soon as you see a mark, before it damages the fibre end.
Every time the fibre is unplugged
Fit a clean cap whenever the output head comes out of the cutting or welding head; a cap that has been left open on the bench should be replaced, not wiped.
Keeping a spare
A spare cap in the drawer turns a burnt window into a five minute job instead of days of downtime.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| Cloudray | USD 25.00 | 1 Nov 2026 |
| Spare Part Mart | USD 20.05 | Today |
Our price of USD 20.05 is approximately 20% 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 depends on hours and working conditions. Follow the machine service schedule, and change it when it shows wear rather than waiting for it to fail.
Leaks, noise, loss of performance, or visible wear compared with a new part. If in doubt, measure it against the sizes in the specifications.
Keep it until the new one is fitted and running. It is the quickest way to compare sizes, connectors and mounting if anything looks different.
Match the part number on the old fiber source part to the original part or a number in the cross reference table. If the number is worn off, compare the sizes in the specifications.
No. It is an aftermarket fiber source part made to replace the the original part. It is not made by the original manufacturer; the number only shows what it replaces.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
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