What are you machining?

[Johnnybravo]

Up the RPM and reduce the depth of cut.
It will help.

Maxed out at 8000rpm already.

 

[Johnnybravo]

Pallet wood. Heavier and lighter in colour than normal pine. Closer grain. Let’s see what happens….

 

[Johnnybravo]

It doesn’t chip,but it does come out a little hairy in places. Nothing insurmountable. I did figure out the issue with the Oak though. Those pieces came out a skip. They were the legs of a table. Three pieces of 20mmx60mm laminated together. I cut two bits,marking how they were oriented and glued them together, side by side. However…whoever glued the three bits together didn’t glue them that the grain runs in the same direction. So I start off cutting with the grain. All happy. 20mm in and I get to the next bit and all of a sudden I am now going against the grain. This is where it chips out at the end. I can probably get around this by leaving the blank oversize, machining the pocket and then cutting it to length.

 

[Blobber]

It doesn’t chip,but it does come out a little hairy in places. Nothing insurmountable. I did figure out the issue with the Oak though. Those pieces came out a skip. They were the legs of a table. Three pieces of 20mmx60mm laminated together. I cut two bits,marking how they were oriented and glued them together, side by side. However…whoever glued the three bits together didn’t glue them that the grain runs in the same direction. So I start off cutting with the grain. All happy. 20mm in and I get to the next bit and all of a sudden I am now going against the grain. This is where it chips out at the end. I can probably get around this by leaving the blank oversize, machining the pocket and then cutting it to length.

View attachment 348546 View attachment 348547

If youve time before the final cut give it a good drenching with thin varnish and let it dry, it will stop the hairyness and should give a nicer cut

 

[Richiew]

Cheers for the offer @Pete. I think it is probably too much trouble due to the wear. I have taken a good look and the wear is over around a quarter to a third of the width? of each tooth. That would be a lot of grinding back and time invested for a Chinese cutter.

I've been far too greedy. I only need one gear which is 3/8" thick so there has been a lot of unnecessary cutting. Material choice was en8 'cos I had some in a convenient diameter but some free cutting leaded stuff would probably do me better.

 

[Kram]

Tube for vac chamber. Decided to make it in two parts two either be used together or seperately depending on item size. Wouldnt fit in bandsaw vice but it had no problem following a line by hand. 150 and 43mm lengths.

Flipping it now for other side. This had lathe and me covered in powdery dust, galv/zinc seasoning?
I was expecting it to ring, short bit turned ok.

 

[Onoff]

Tube for vac chamber. Decided to make it in two parts two either be used together or seperately depending on item size. Wouldnt fit in bandsaw vice but it had no problem following a line by hand. 150 and 43mm lengths.
View attachment 348601
View attachment 348602
Flipping it now for other side. This had lathe and me covered in powdery dust, galv/zinc seasoning?
I was expecting it to ring, short bit turned ok.

Are you going to do the same with this 200mm dia bit I have for you?

 

[Kram]

I'll leave it full length and face the ends. Might turn ID and OD depending how the smaller one goes.

 

[My Old Landy]

I don't know if this counts as machining my first attempt at cnc routing. Not brilliant but at least I know where I am going wrong

 

[Rannsachair]

There was a missing knurled screw on one of the dials on my Tom Senior Mill, so I made 2 today (spare for the dial on my rotary table.

First time use of the collet chuck on the Harrison:

Made in stainless with Whitworth thread:

Tidies up the mill:

 

[Onoff]

150 and 43mm lengths.

For taller items you'll put the two together. How, greasing the perfectly abutting faces?

 

[Kram]

Im thinking a good fitting connector tube, probably from my lump of delrin.

 

[Onoff]

Im thinking a good fitting connector tube, probably from my lump of delrin.

I've some short length of pvc drainage tube here circa 300mm long if of any use.

- Grey pvc, 200mm dia, 192mm ID, 4mm wall

- Brown pvc, 200mm dia, 190mm ID, 5mm wall

Did have some red but I think I used most of them for the legs of my bean frame.....

 

[Johnnybravo]

Spigot shaft back from hardening. Finished ground the two bearing journals and the flange. Had warped 0,04mm so was well happy with that

 

[Brad93]

Spigot shaft back from hardening. Finished ground the two bearing journals and the flange. Had warped 0,04mm so was well happy with that

View attachment 350042 View attachment 350043

Do you know a good grinding firm?

 

[Johnnybravo]

Do you know a good grinding firm?

No, done myself Ona friends cylindrical grinder

 

[Johnnybravo]

Do you know a good grinding firm?

I had some grinding done years ago by a guy somewhere not far from you. Cannot remember his name or location. Found on the internet ,he was a one man band. Had a small little shop with three cylindrical grinders. All I remember was he was located in a shopping centre kind of place surrounded by houses. There was a place that fitted car radios there and there was like a burger joint/ roadhouse kind of place in the same little complex. Must have been about 6-7 years ago. Did good work,price wasn’t the worst. No idea if he is still going.

 

[Munkul]

I cut a circle out of 10mm mild steel plate free-hand with the plasma
Marked the 5 hole PCD with compass and scribe and drilled out, plus centre hole
4 jawed clocked to the centre hole, and bored out
transferred to small 3 jaw and re-chucked in the 4 jaw clocked to the centre again, and cleaned up the OD
Bolted to the welding positioner, 7 tenths runout, not bad for a hand scribed and hand drilled PCD.
Placed the chuck on the positioner, clocked true, and the 3 holes transfer punched, drilled and tapped.
Positioner ready for work now, just waiting on a couple of wiring plugs to finish the control box off neatly.

 

[Munkul]

Made 46off bushes the other week, out of EN19. Nothing fancy, just drilled and OD turned. Nice stuff to turn the picture didn't do the surface finish justice.

 

[Mark Davison]

Rotary encoder mount for spindle speed and position on my Bantam lathe. The radiused edges still need finishing on the mill/rotary table or belt sander but otherwise I think its quite a neat solution with no need to modify the lathe in any way. The adjuster screw isn't shown in the photos. It bears against the main bearing cover to take up the slack on the belt. The whole thing slides onto studs used to mount the cover. Just need to add a nut to stop lateral movement.