Uploaded December 2025 | Updated September 2026, 2 days ago
Have you wondered how to grind rubber parts, or which shape engraving tool works best? @StefanGotteswinter and I had a great chat last week, and since Live streams are not really pushed by YT, here is the edited version, full of Stefans tips and shared knowledge.
___________________
00:00 - Intro
00:08 - Self employed - do you get a vacation?
00:56 - Any personal projects planned over the break?
02:34 - What is your favourite material to machine?
04:02 - Which aluminium alloy, available in Europe, machines best?
05:11 - Best for machine accessories.
05:47 - Have you ever machined Cr Ni Co super alloys?
09:42 - Do you tend to machine a lot of pre-hardened metal?
10:26 - When do you switch to PCD or MCD tooling?
11:26 - What about CBN inserts?
12:44 - When will we see an EDM machine in your shop?
13:39 - Do you still use much HSS tooling?
14:11 - Do you use a tool table in the lathe DRO?
16:07 - Is there any material you hate machining?
18:39 - Do you have a suggestion of a general purpose grinding wheel?
20:25 - How does Stefan balance grinding wheels?
22:02 - Do you tend to grind much aluminium, brass etc?
24:54 - How do you dress CBN grinding wheels?
26:20 - Do you dress diamond wheels on your grinder?
28:08 - Lets talk about grinding wheel balancing.
31:43 - Does your family support your machining hobby?
32:17 - Did your kids ever show interest in machining?
32:55 - It is a pretty narrow hobby, with a thinly speed community.
34:32 - Lets move on to engraving
34:52 - Which style of engaving cutter works best?
35:16 - ... for lettering.
35:30 - ... for lines.
36:45 - Do you need an air spindle?
37:40 - Which spindle do you mostly engrave with?
39:12 - Do you ever use drag engraving?
40:45 - What is your air spindle RPM?
41:39 - Have you ever considered building an adapter to mount the air spindle on the surface grinder for internal grinding?
42:09 - How do I machine a hardened SK40 tool holder for a different pull stud?
46:35 - Are you an expert on FeatureCAM?
47:33 - Have you considered getting the big 2037 rotary table for the Deckel?
47:57 - Do you often run into the size limitations of the Deckel FP1?
48:52 - Will we ever see small hobby style surface grinders?
50:38 - Does Mark monly work with general aviation?
50:57 - Is there a European alternative to MacMaster-Carr?
52:07 - Why end live streams so abruptly?
52:38 - Does Stefan have long term, larger personal projects?
53:24 - Deckel or Maho, which is better?
54:58 - Wrap up, thanks for watching, Merry Christmas everyone.
___________________
If you enjoy my content and would like to support my channel... I'd really appreciate it.
Please join me on Patreon and help build this community.
patreon.com/RotarySMP
or sign up for youtube memberships using the "JOIN" button above.
or please just buy me a coffee...
paypal.me/rotarySMP
____________________
Have you wondered how to grind rubber parts, or which shape engraving tool works best? @StefanGotteswinter and I had a great chat last week, and since Live streams are not really pushed by YT, here is the edited version, full of Stefans tips and shared knowledge.
___________________
00:00 - Intro
00:08 - Self employed - do you get a vacation?
00:56 - Any personal projects planned over the break?
02:34 - What is your favourite material to machine?
04:02 - Which aluminium alloy, available in Europe, machines best?
05:11 - Best for machine accessories.
05:47 - Have you ever machined Cr Ni Co super alloys?
09:42 - Do you tend to machine a lot of pre-hardened metal?
10:26 - When do you switch to PCD or MCD tooling?
11:26 - What about CBN inserts?
12:44 - When will we see an EDM machine in your shop?
13:39 - Do you still use much HSS tooling?
14:11 - Do you use a tool table in the lathe DRO?
16:07 - Is there any material you hate machining?
18:39 - Do you have a suggestion of a general purpose grinding wheel?
20:25 - How does Stefan balance grinding wheels?
22:02 - Do you tend to grind much aluminium, brass etc?
24:54 - How do you dress CBN grinding wheels?
26:20 - Do you dress diamond wheels on your grinder?
28:08 - Lets talk about grinding wheel balancing.
31:43 - Does your family support your machining hobby?
32:17 - Did your kids ever show interest in machining?
32:55 - It is a pretty narrow hobby, with a thinly speed community.
34:32 - Lets move on to engraving
34:52 - Which style of engaving cutter works best?
35:16 - ... for lettering.
35:30 - ... for lines.
36:45 - Do you need an air spindle?
37:40 - Which spindle do you mostly engrave with?
39:12 - Do you ever use drag engraving?
40:45 - What is your air spindle RPM?
41:39 - Have you ever considered building an adapter to mount the air spindle on the surface grinder for internal grinding?
42:09 - How do I machine a hardened SK40 tool holder for a different pull stud?
46:35 - Are you an expert on FeatureCAM?
47:33 - Have you considered getting the big 2037 rotary table for the Deckel?
47:57 - Do you often run into the size limitations of the Deckel FP1?
48:52 - Will we ever see small hobby style surface grinders?
50:38 - Does Mark monly work with general aviation?
50:57 - Is there a European alternative to MacMaster-Carr?
52:07 - Why end live streams so abruptly?
52:38 - Does Stefan have long term, larger personal projects?
53:24 - Deckel or Maho, which is better?
54:58 - Wrap up, thanks for watching, Merry Christmas everyone.
___________________
If you enjoy my content and would like to support my channel... I'd really appreciate it.
Please join me on Patreon and help build this community.
patreon.com/RotarySMP
or sign up for youtube memberships using the "JOIN" button above.
or please just buy me a coffee...
paypal.me/rotarySMP
____________________
