New member looking for a couple items for my RF-31

[epanzella]

Put a weld bead around the bolt head and machine ( or grind) it to lock in the hole.

 

[FanMan]

The ones on my RF-30, at least, were a weird size. Here's a thread on it:

Jet column clamp bolts

Today I replaced the column clamp bolts on my Jet JMD-15 mill/drill. The threads on the original ones were bunged up to the point that they didn't turn easily, and the motor lock screw interfered with using a box wrench (I like the old flea market offset wrench I'm using, an don't feel like...

www.hobby-machinist.com

 

[pontiac428]

McMaster Carr hardware did it for me. Original bolt and new studs shown. Major improvement in consistency and tram. Feels like a throw lever rather than a gritty, wobbly bolt now.

Edit- Here are the part numbers:

Black-Oxide Steel Setup Stud
5/8"-11 Thread Size, 8" Long, 1-3/4" Long Threads
90281A822


Black-Oxide Steel Leveling Flange Nut
5/8"-11 Thread Size
91045A035


Extreme-Strength Steel Extra-Wide Hex Nut
Grade 2H, Black-Oxide, 5/8"-11 Thread Size
91026A035