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Member postings for Buffer

Here is a list of all the postings Buffer has made in our forums. Click on a thread name to jump to the thread.

Thread: Form Tool Sharpening
09/05/2019 22:22:06

Hi

I have just used a bench grinder and ground my first form tool in HSS for making some brass bits. The cutting edge is about half an inch in length.

Can anyone tell me what is the best way of smoothing out the edge and sharpening this? As its a curve its not obvious.

Thanks

Rich

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Thread: Setting Milling-machine Vice
06/05/2019 14:09:44

I think my way might be a little different.

With the vice slightly slack I clamp a long ground flat in the vice then bring a verdict gauge up to the left hand end.

Then with power feed on (or hand wind it) I traverse the table right to left and just tap the vice until the needle stops moving. I dont care what reading it starts or stops on, the needle just has to stop moving. Then nip up the vice, feed back the other way to check and your done. I can normally do it in less than one pass.

Saves a lot of going back and forth thats for sure.

Regards

Rich

Thread: DIY Bed Gap
25/04/2019 19:19:54

Isn't it funny that Terry has Golum as his picture but doesn't think his lathe is that precious!

Thread: What Did You Do Today 2019
08/03/2019 20:18:02

Phil

I think angle grinders are in the three most dangerous things you can hold after hand grenades and chainsaws.

Thread: Brian Perkins
08/03/2019 20:12:40

I agree, a great modeller and a nice chap too. I remember having a talk to him at a show a few years back, I left full of enthusiasm. Thoughts are with the family and friends.

Rich

Thread: Metal Cutting Power Saw
06/03/2019 08:41:43

Ron what about a kennedy power hacksaw. Its small enough to put under a bench and get out when needed

Thread: Vickers Bl 8 inch Howitzer cannon of 1917
26/02/2019 12:27:21

Mal

Its an 800lb palliser shot copied from the dimensions in the handbook. Yes i will black it put in the brass studs and then make a little shell barrow. Just for a bit of fun.

Regards rich.

25/02/2019 15:33:27

Mal

Nice shell. Here's a 12.5 inch RML paperweight I have been making.

Regards Rich

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Thread: National Trust and Gift Aid
17/02/2019 06:54:07

Robin

lm no expert but I think the other way they could claim it is if they give you a years free entry ( like the tank museum). But as they don't want to give you that then I think you make a donation. They don't get gift aid from me for this reason. But tank museum and the others do get it from me.

rich

Thread: bunging up hole in CI
12/02/2019 16:38:41

Having gone to the effort of making the hole Is it worth keeping the spare hole.

Thread: Metric thread cutting in a lathe
25/01/2019 17:45:14
One big mistake i made was to set my cross slide over to 30 degrees and the thread was very odd. It took a while to work out that i needed to set it to 60 degrees on my lathe. Seems obvious now but it didn't at the time.
25/01/2019 12:39:47

Success!

Just kept trying it as I got close until I got a nice fit. When I said fairly important it was a ball screw for converting my SX3 to CNC.

Regards to all

Rich

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25/01/2019 10:04:49

I work to to tolerances of things like a Bee Space or a Nad.

I think I will go just slightly under 12mm and then go in by 0.61mm and see how it goes.

Regards

Rich

25/01/2019 08:45:34
Thanks for the info but i have bought 12x1 locking nuts and it is mentioned in tables so it seems standard at first glance.
25/01/2019 07:43:10

Thanks for the replies you have all been very helpful.

With the 0.6134 x pitch I can now see that this will indeed cut down to the Minor core diameter in this case 10.77 so that's that solved also.

Thanks again

Rich

24/01/2019 22:36:15

Hi

Sorry for this basic question but I have only cut 1 thread in a lathe and now need to do something fairly important.

I know how to set the tool the cross slide etc but my problem is more to do with lack of knowledge of threads.

Am I correct in saying that to cut a 12x1mm thread I have to turn the bar down to 11.8mm? I'm asking because in The Model Engineers Handbook by Tubal Cain he shows a drawing and I can just about see it says 0.1P for the amount of thread crest that is taken off.

Is it better to take this off the diameter before I start or does it not matter? I am thinking I should take it off before or I will end up not knowing if I should cut the thread deeper or take some of the diameter to get the nut to fit! Some advice would be great.

One last question, How do I work out how deep I need to cut in order to get the thread properly formed. Is it simply 0.86mm as he seems to show what looks like 0.86P. Or does it have something to do with the Minor Core diameter that is listed in the tables, which in this case is shown as 10.77mm

Sorry if this seems basic but I have always stayed well away from threading in the lathe through lack of knowledge but now I need to start doing some.

Thanks for any help you can give

Rich

Thread: Autocad 2000 Cant draw at a chosen angle.
17/01/2019 09:00:39
Thanks for the help as Robin said it was direction control somehow had 330 in it and not 0.
regards to all
Rich
16/01/2019 20:07:49

I have found it now. Its in Format/Units/Drawing Units/Direction Control.

Thanks for the reply.

Rich

16/01/2019 19:24:01

Nigel

Hopefully this photo will explain it better.

It seems as though the angles are all rotated clockwise by about 30 degrees and I dont know how to set zero degrees horizontal? Thanks Rich

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16/01/2019 18:32:18

Hi

I am trying to draw a line 70mm long going down at 30 degress from the horizontal by using the command @70<30. The line is 70 long but always goes horizontal and to the right so it seems as though my zero degrees direction is going off at about the 4 o'clock position.

Does anyone know how to set the zero degrees into a horizontal position or even straight up?

Thanks

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