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  1. dnalot attached a file to the thread Marks Holt 75.

    To drill and tap for the head bolts I mounted the cylinders to the top half of the block to make it easy to mount on the mill. From...

    Drill and Tap.jpg Jan 27, 2020 at 2:30 PM
  2. dnalot attached a file to the thread Marks Holt 75.

    For the next steps I turned down a mandrel to a close slip fit for the cylinder assembly. Using the mandrel I cut a chamfer at the...

    sleeve mandrel.jpg sleeve chamfer.jpg sleeve face.jpg Jan 27, 2020 at 2:27 PM
  3. dnalot attached a file to the thread Marks Holt 75.

    I cut the OD on the lathe and drilled out the center to ¾ of an inch before parting off. The parts were then held in a collet chuck for...

    sleeve outer.jpg sleeve bore.jpg Jan 27, 2020 at 2:25 PM
  4. dnalot attached a file to the thread Marks Holt 75.

    The cylinder sleeves are made of cast iron. I started with a piece 1.25” by 12” and using my lathe I removed more that 95 percent of the...

    Material.jpg Jan 27, 2020 at 2:23 PM
  5. dnalot replied to the thread Pacific Northwest.

    Hi I live near Mt Saint Helens (Mossyrock Washington) I too would like to get together with someone else who has the bug. Any others?

    Jan 26, 2020 at 8:18 PM
  6. dnalot replied to the thread Another PeeWee.

    At 176 degrees F or 80 C. magnets lose their magnetism. It is permanent if held at high temp for any period of time. So yes a hall...

    Jan 24, 2020 at 3:01 AM
  7. dnalot liked DavHJ's post in the thread Another Bill Harris Steam Roller.

    [ATTACH] [ATTACH] More progress on the steam roller, all that is left is the coal box and water tank.

    wjTQH1kBR66PqKs2p0DI2Q.jpg DnTp+rMFT%SInst071CSmQ.jpg Jan 24, 2020 at 1:50 AM
  8. dnalot liked Robert Ritchie's post in the thread Marks Holt 75.

    Fantastic Work

    Jan 23, 2020 at 4:45 PM
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