compression tube abrasion

[Toxylon]

Ron,

Wow - that's like a preform level of surface condition there, in a high-dollar pneumatic machine as sold. Building to a cost illustrated.

I'll have to take a photo of my HW80 chamber from the days gone by. I know it looks very smooth, but I lack evidence like yours.

[Bayman]

Ron,

Wow - that's like a preform level of surface condition there, in a high-dollar pneumatic machine as sold. Building to a cost illustrated.

I'll have to take a photo of my HW80 chamber from the days gone by. I know it looks very smooth, but I lack evidence like yours.

The interior wall was smooth when I got it, sans the seam and the assembly twist scrapes from the trigger plug. I did the light hone that looks drastic in the photos to reduce the tubing seam. The last few new guns sent to me had the seam visible end to end. The guns still worked well enough when I was done. Certainly not ideal but I didn't want to oversize tubing either. People balk when I talk about slipping Weihrauch quality but I catch stuff most don't.

[Tom1340]

Ron,  interesting photo of the tube seam.  I wonder if it is a coincidence that your example shows the seam 180 degrees opposite the cocking shoe slot?  Or is that location an HW standard?  That is exactly where the wear occurs in my gun.  The pressure of the piston on the tube, opposite the shoe, is a factor in my wear.... maybe the welded seam is a factor also.  Anyway, not a problem for the time being,  the cocking stroke was as smooth as can be today.