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Excellent idea! You might also try the PTFE tape solution, as your chosen name seems to imply that you will be able to meet the challenge of gluïng it correctly.

Two solutions to reduce vibration that I still use every once in a while. First damping. In the big main machineshop of Philips in Eindhoven when machining a large complex fabrication or fragile casting we placed a few sacks of sand of about 10 kilo each on, in and around the part. It still...

Noise is not a big issue in my old countryside farm. My next neighbour 1 mile off is the nursery of my brother. He mainly employs farmer-kids from age 14 - 20 who try to save up for their first motorbike. Their daily noise easily surpasses any noise from my workshop. The top-sound is made by his...

For stability and precision you want to hold mills in a collet. For speed of handling you may use a drill chuck at the penalty of stability and some precision. A problem with the three jaw chuck - in addition to the already mentioned questionable holding power - is that if the mill slips the...

Maybe I get it all wrong, but I reckon in calculating expansion the expansion of a disc is the same as the expansion of a ring. So the lineair expansion is the diameter expansion.

No hole in the bucket?

Mass, versatility, presumably precision and some not too serious repairs. I love it! On covers: my antique grinder tried to rely on solid metal moving covers. From the local sailmaker I got a length of tight sailcover cloth. I cut rectangles from it and after set-up I attach those with some...

I guess that for general tool grinding you need the possibility to hold square/rectangular tools and rotational tools. To present the tool to the grinder you need the possibility for lineair movement in three directions and angular movement in at least two planes. For my non-professional home...

In traditional machinetools the slides need a minimum of play in order to move at all. When you put load on the table first the play will be squeezed out, then the surface roughness will be pressed in and finally the form tolerances will adapt to each other. All this results in a lot of...

Hi Hennie, power and precision come from mass, accuracy of manufacture - and heritage. Milling machines that of old have originated from lathes have as main a horizontal spindle, often like Bridgeport expanded with a versatile head with vertical spindle. The milling machines that originate from...

A friend of mine who does CNC easily surpasses any simple engraving I'm able to do. He can make the most beautiful clock dials, with look-alike handlettering, controlling the width of the line with the depth of cut. And a tooling set-up that closely follows the surface of the never fully flat dial.

The engraving of the lines is done with a slitting cutter of diameter 40 mm width 0,3 mm to a depth of 0,3 mm. The division on the toolholder is done on a Vertex 150 with dividing plates. I made a jig with radius 100 mm for the division of the sideplates with 1,13 mm spacing for each degree line...

Im impressed with the practicality of your device. In my shop I use a two axis vise which proves to be very stable. I use it mostly on my in principle very versatile Aciera F3 milling machine to avoid the time-consuming precise resetting of milling table and head. For grinding I made a sinus...

With respect, one of my main drivers to buy an oven is that I'm not really able to tell temperature by colour. 'Halfway between cherry-red and tomato-red as observed in an old dark and smoky smithy' is way beyond my skills. It is remarkable therefore to see the suggestion to use colours to check...

Our resident metallurgist has the practice of wrapping a piece of paper around the tool before wrapping it in stainless foil. This will carbonize in heat and so offer a tiny bit of addtional protection all over the tool inside the foil.

Increasing the hardening temperature above 800 deg C seems like a good idea. Our resident metallurgy engineer advises for small oil quenching parts a hardening temperature of 830 deg C for at least 15 minutes. After that as quick as possible transfer to the quenching bath of oil at 50 deg C...

On a baffle; I found a slab of thin so-called pizzastone very useful to make all sorts of baffles and subdivisions in the oven.

Two reasons for a separate tempering oven. In the first place you want to do the tempering immediately after the quencing, and your big oven will take a while - up to 30 minutes - to cool down to tempering temperature. In the second place at least my wife was not happy with the prospect to let...

Your set-up certainly looks good! As explained in the parallel thread 'Keeping 01 free of carbon buildup while hardening' quick transport from oven to quencing bath is essential, so you may want to spend some thought of where to position your quencing bath. Our resident heat treatment engineer...

According to a tale from an old machinist in his time there were travelling tradesmen specialized in heattreatment and grinding of cutting tools. He tells that they got the tools very hard by dunking them in a bath of mercury.