A Real Dirty Job
Moderator: Harold_V
- Dick_Morris
- Posts: 2851
- Joined: Sat Jan 04, 2003 2:09 pm
- Location: Anchorage, AK
Re: A Real Dirty Job
When I need small angle or channel I cut square tubing lengthwise and mill the edges to size. On the smaller stuff the corners are relatively square and it comes in several thicknesses. It's available in mild steel and SS. I usually cut one piece of square into four lengths of angle. It tends to distort slightly when the stresses are released, but it's managable.
Re: A Real Dirty Job
Fly cutting the HR steel angle to finished thickness on the wide face.
For HR steel, I had to experiment several times with the clearance angles on the HSS tool bit, increasing them several times and honing the rounded cutting edge to have a fine flat surface finish. DOC was 0.003" - 0.010" at 90-135 RPM with a very slow feed rate (about 0.75" min.) and reversing the cut at the end of a pass to achieve the scraping finish I wanted. I guess this means my mill spindle is very slightly out of tram. It is at times like this one wishes for table power feed.
For HR steel, I had to experiment several times with the clearance angles on the HSS tool bit, increasing them several times and honing the rounded cutting edge to have a fine flat surface finish. DOC was 0.003" - 0.010" at 90-135 RPM with a very slow feed rate (about 0.75" min.) and reversing the cut at the end of a pass to achieve the scraping finish I wanted. I guess this means my mill spindle is very slightly out of tram. It is at times like this one wishes for table power feed.
Re: A Real Dirty Job
Pushing on with the angle milling of the cut down angle and the cab rear support sheet.
Re: A Real Dirty Job
Further along after some band sawing, milling, belt sanding, drilling and tapping. Am just doing the minimum drilling and tapping to align with the existing holes in the engine's cradle and cab floor.
Re: A Real Dirty Job
Finishing the cab rear support sheet.
The automatic stoker tunnel cutout in the cab rear support sheet was produced through more band sawing, belt sanding and milling. Nothing special here other than taking the usual care with each operation.
The automatic stoker tunnel cutout in the cab rear support sheet was produced through more band sawing, belt sanding and milling. Nothing special here other than taking the usual care with each operation.