Gallery, Projects and General > How do I??
Clamps for a Height Gauge Scriber?
Pete W.:
Hi there, all,
This isn't so much a 'How Do I?' thread, it's more a 'How Would You?'.
First of all, a bit of background: Some time ago, I bought a Rabone, Chesterman Height Gauge, here it is:
The trouble was, it had lost its scriber and clamp. (I think I did post a mention of this some time ago. Someone, somewhere must have a cupboard full of scribers and clamps because lots of the height gauges listed on eBay are scriberless and/or clampless!)
After some searching, I decided to grasp the nettle and buy a new scriber. The Rabone gauge scriber-stub is imperial, ¼" by 0.600" as shown here:
So I looked for an Imperial scriber - the nearest I could find was a tungsten carbide tipped Mitutoyo item, shown here:
That is ¼" wide OK but is 0.500" high so I'd need a clamp with a capacity of 1.100". The Mitutoyo clamp I bought has a capacity of only 1.000", shown here:
(One of the contributors to the Model Engineer site posted a Rabone Chesterman height gauge catalogue but it didn't have any information on the sizes of their scribers and clamps.)
So, here's the meat of my thread: I have to make a clamp with the right capacity to attach the scriber to my height gauge; I have several ideas how I might do this, some by hewing from solid, some by fabrication. Most approaches are laborious, none are snag-free. The clamp has to have a truly rectangular, precisely ¼" wide aperture. (Note that the Mitutoyo item has corner relief.) I don't have a shaper or a broach and I don't fancy filing the aperture to size and shape. I'd prefer a corrosion resistant material, stiff enough to retain its shape. (So silver-soldered brass would probably bee too soft!)
So, Mad Modders, how would you make it???????
j1312v:
Hi,
Why don't you get 0.1" or more from the scriber.
If you have or know someone with access to a surface grinder it should be much quicker that make a clamp.
Best,
Joe
chipenter:
I have had sucksess with 1mm thick cutting disk for an angle grinder in a slitting saw arbor , on hardened steel cover everything up and take it off the height guage .
sparky961:
My approach would be to modify the scriber or height gauge. Check the scriber's hardness with a file. Even if its hard but not extremely so, you could cut with a carbide endmill. If totally soft then anything will work.
Ironically, I have 1 height gauge and 3 clamps of various sizes... :-)
Lew_Merrick_PE:
Not that it is trivial, but a pair of "plates" made from 16 gauge (or so -- 1.5 mm) sheet would be the cheeks to retain the scriber. A pair of "ends" -- call it .010 inch (0.25 mm) wider than the scriber or mount could then be carefully pinned/riveted or soldered to the "plates" -- and then it is a matter of drilling and tapping for an appropriate screw and mounting a "clamp bar" to the screw.
???
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