Elmers VR75 build log

Gallery, Projects and General > Project Logs

<< < (3/5) > >>

spuddevans:
Today I started where I should've started the last time, by putting my little assembly into the mill vice to true up the top surface and re-bore the hole, and I blued (blacked :scratch:) up the top with a permanent marker.

Then I pulled out my little flycutter and lowered until I just started scraping off the marking.

And 0.2mm depth of cut later,

Then I used my edge-finder and found the dead centre of where the hole should be, and then ran boring head down a few times until I had centred the hole, maybe 0.5mm bigger than it was.

I then started thinking about how to clean up the outside bent corners of the top of the standard. I remembered I had a set of "Routing" bits that I bought for my Dremel-type tool.

They are HSS (the box says) and I have used some of them on Brass before, but never on steel. I decided to give it a go, but to go really gently and with shallow depth of cuts.

I selected the one circled in red, and stuck it in the mill. It kinda looks lost in the ER32 chuck.

And before long, well actually after quite a while, (I was only taking 0.2-0.5mm cuts) I had one side done.

The finished standard (for the moment, after seeing InkyEngines VR75 I may also do something with the sides of the standard)

Next up will be the crosshead guide.

Thanks for following,

Tim

ieezitin:
Tim.

I really like the little profile with the router bits, i take it they were intended for wood but i have used them like you on soft stuff.

Anthony.

spuddevans:

--- Quote from: ieezitin on August 14, 2013, 02:45:14 PM ---i take it they were intended for wood but i have used them like you on soft stuff.

--- End quote ---

Yes, you're right. They're not TCT but HSS, so I didn't think they would hold up cutting steel, but they did. I just took it really gentle on feeds and really light cuts. I also used some cutting fluid to help things along.

The bit seems to have held up ok, should be usable if I need to "Decorate" any other parts of this build.

Tim

spuddevans:
So I want you to imagine that, lurking within these 2 innocent looking brass bars are both a 22mm flange and a crosshead guide. One will take more imagination as I only got making the crosshead guide today.

So I stuck the thin one in the ER32 chuck in the lathe and whittled the body down to 14mm and then marked up the shoulder for the flange.

Then turned the shoulder and drilled the centre out to 9mm

Then to make sure the drill hadn't wandered I used a boring bar to open it out to final dimension (actually I over-shot a little, was going for 10mm, ended up with 10.13mm, but I'll be making the crosshead to fit it so it doesn't matter )

Then I turned down a little shoulder on the chuck end so I would be able to see the main body length clearly.

This was because I then transferred over to the mill, and into the Spindexer for cutting out the little windows. I 1st of all zeroed the DRO's on centre and on the edge of the flange shoulder. ( 1st time using the edge-finder on such a shallow edge, 0.5mm ) You can see where the edge-finder has scraped off some of the black marker.

Then using an 8mm endmill it was simply a case of nibbling away, first one side and then the other.

Then it was back onto the lathe ( thank goodness for having a collet system that fits both machines, makes life so much easier ) where I parted off the excess stock and set about turning another shoulder, this time to fit the Standard.

I didn't measure for this, just turned a little off and kept trying the fit until it slid on easily without much play (it's going to be silver soldered so a little room for the solder to wick in is good)

Then after turning the length down a tad, and a little fettling I had this.

Tim

vtsteam:
Looking good! I'm enjoying this very much. :clap:

Navigation

 Message Index

Go to full version