A few years ago I watched a YouTube clip showing the operation of an Aciera F3 mill and quite liked the vice stop shown at 7:35 - https://www.youtube.com/watch?v=l-PPh8KFjMM
A search online resulted in finding a stop made by a Swiss firm, Marwa. Their stop appeared more versatile than the one shown in the clip because the stop end was removable facilitating the use of the tool as an indicator stand. I have a few indicator stands but nothing really rigid enough to support some of my heavy indicators and those indicators, Compac and Cary, do not have rear mounting lugs.
The chances of locating a Marwa looked pretty slim so I thought I would have a go at something similar. Marwa used a 7/8" diameter post. I increased the diameter of mine to 30mm because it would allow the fitting of the indicator support from my comparator stand. I bought 300mm of 4140 chrome bar from Bohler and 300mm of chromed case hardened ground bar from an eBay seller specialising in DIY CNC gear. The clamp body is 4E cast iron and the bar clamp bar and cup, 1045. The handle is a German Kipp purchased cheaply from the States on eBay.
Machining the 22mm AF hex on the post involved an improvised tailstock and having the dividing head and its saddle dangling off the end of the mill's table. The 22mm matches the mill's drawbar's hex.
The Marwa has a large knob end :o to support the stop finger in 3 positions. I made mine flat. The finger is 4140 with a standard M8 13mm AF hex.
I will probably make a couple of extra bits. One should be an adjustable length stop finger, the hex would be replaced by a knurled ring and it would have a knurled locking ring. At present, when the clamp is tightened the finger unavoidably moves and this exerts pressure on an item in a vice if the finger was positioned after the item was clamped in the vice. No problem if the finger was there first.
The other bit and a bit trickier could be a fine adjuster for the indicators. The springs in my Noga and little Compac stand can't cope with the weight of the heavy indicators.
The parallelogram adjustment mechanism on the comparator might show promise if it could be miniturised.
Throughout this project I used the universal vice Michael procured for me. Its stop worked wonderfully as did the vice's indexing. Hard to paint something when it needs to be used.:U
BT
PS sadly I found out that the Starrett parallel sitting under the 1um Cary has a 9um dip in the middle on one edge. :no:
Attached Images
Read the full thread at metalworkforums.com...
A search online resulted in finding a stop made by a Swiss firm, Marwa. Their stop appeared more versatile than the one shown in the clip because the stop end was removable facilitating the use of the tool as an indicator stand. I have a few indicator stands but nothing really rigid enough to support some of my heavy indicators and those indicators, Compac and Cary, do not have rear mounting lugs.
The chances of locating a Marwa looked pretty slim so I thought I would have a go at something similar. Marwa used a 7/8" diameter post. I increased the diameter of mine to 30mm because it would allow the fitting of the indicator support from my comparator stand. I bought 300mm of 4140 chrome bar from Bohler and 300mm of chromed case hardened ground bar from an eBay seller specialising in DIY CNC gear. The clamp body is 4E cast iron and the bar clamp bar and cup, 1045. The handle is a German Kipp purchased cheaply from the States on eBay.
Machining the 22mm AF hex on the post involved an improvised tailstock and having the dividing head and its saddle dangling off the end of the mill's table. The 22mm matches the mill's drawbar's hex.
The Marwa has a large knob end :o to support the stop finger in 3 positions. I made mine flat. The finger is 4140 with a standard M8 13mm AF hex.
I will probably make a couple of extra bits. One should be an adjustable length stop finger, the hex would be replaced by a knurled ring and it would have a knurled locking ring. At present, when the clamp is tightened the finger unavoidably moves and this exerts pressure on an item in a vice if the finger was positioned after the item was clamped in the vice. No problem if the finger was there first.
The other bit and a bit trickier could be a fine adjuster for the indicators. The springs in my Noga and little Compac stand can't cope with the weight of the heavy indicators.
The parallelogram adjustment mechanism on the comparator might show promise if it could be miniturised.
Throughout this project I used the universal vice Michael procured for me. Its stop worked wonderfully as did the vice's indexing. Hard to paint something when it needs to be used.:U
BT
PS sadly I found out that the Starrett parallel sitting under the 1um Cary has a 9um dip in the middle on one edge. :no:
Attached Images
DSC_5344 (Large).JPG (104.8 KB)
Read the full thread at metalworkforums.com...
Vice Stop ( or why the vice is still not painted Michael )
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