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Thread: Very simple milling job required
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12th February 2013, 04:36 PM #1Product designer retired
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Very simple milling job required
I've just had a couple of acetal sliding door guides milled up, and have to modify one of them.
Basically I just need 7.6mm approx. milled off the bottom. The only complication is some packing strips will need to be inserted into the channel section so the sides don't collapse in when clamped up in the vice. The base needs to finish up 4mm thick.
I'm reluctant to take the block back to the machinist, I really got smacked around with the cost, and he was a mate too.
I'm in the Heidelberg area and only have Tuesday's, Thursday's, Saturday's and Sunday's free.
Attached are a couple of crook photos and the original dwg.
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12th February 2013 04:36 PM # ADSGoogle Adsense Advertisement
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12th February 2013, 09:20 PM #2.
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Hey Ken,
If you have a vice and a hacksaw, why not just saw off the excess and sand the mess smooth on a sheet of alox paper.
BT
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12th February 2013, 10:06 PM #3Product designer retired
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A mill is the go
Hi BT,
I have considered all the options, a simple milling process is the go.
Anyone, anyone, there's a slab in it for you.........
If only I had my Arboga up and running...........
Ken
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12th February 2013, 10:54 PM #4SENIOR MEMBER
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neksmerj, if you don't mind a drive to Healesville, about an hour i spoze,
john
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13th February 2013, 12:42 AM #5GOLD MEMBER
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Hi Ken
You'd have to be unlucky but I cant fit you in next Thursday.
Be quicker to post them to me if it suits.
Quicker still to get that damn mill going!
Stuart
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13th February 2013, 12:45 AM #6
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13th February 2013, 07:45 AM #7SENIOR MEMBER
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Ken
Do you have a lathe? (I can't remember if you have mentioned it or not in other posts/threads) If yes, will it swing 120mm dia? if yes, why not set you guides up in a four jaw and just face the back down to the thickness you want? A bit of mucking about because the plastic is, well , plastic and so will deform a lot easily than metal but still I reckon it would be doable.
regards
bollie7
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13th February 2013, 09:49 AM #8Senior Member
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Ken,
Have you thought about using a router? Clamp the block between a couple of wood parallels which will serve as rails for the router base and use a router to skim off what you don't need.
Christian
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13th February 2013, 10:44 AM #9GOLD MEMBER
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Ken going by your drawing and your comments something appears to be wrong.
If the base is per the drawing at 15mm and the finished size is now 4mm that would suggest an 11mm difference,you have asked for 7.6 mm to be removed.
Did your mate charge between $40.00/$50.00 plus material for this job.
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13th February 2013, 12:33 PM #10Product designer retired
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A simple bit of milling
Thanks guys for all the suggestions.
Pipeclay, nothing escapes your eagle eye. The finished blocks were machined undersize to suit the acetal the machinist had on hand.
You are also correct about the pricing.
Stu, I may be in touch.
Ken
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13th February 2013, 01:38 PM #11GOLD MEMBER
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While we're picking on the drawing.
Don't double dimension(now is that general practice or just something I picked up along the, anyone?)
and who called out +/- 0.1mm on a door track?(unless of course its needed )
Stuart
pm sent
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13th February 2013, 01:55 PM #12Product designer retired
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The drawing
Everyone's picking on me. Stu, double dimensioning is not the norm. In this case, the dwg was sent to an apprentice to program a cnc mill. I wanted to leave no doubt with the dimensions. All the dims went out the window anyway when the machinist decided to reduce the overall size to suit the acetal stock in hand.
Win some, lose some.
PM sent.
Ken
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13th February 2013, 02:08 PM #13SENIOR MEMBER
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13th February 2013, 11:06 PM #14.
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Double Dimensioning Defence
I do it. Better too much information than not enough.
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14th February 2013, 08:16 AM #15SENIOR MEMBER
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HUH ???. What sort of machinist is this bloke? Obviously I don't know the full story here, but just going on this, then the "machinst" should maybe consider doing something else. If someone is paying him to do a job and supplies a drawing, then its not up to the machinist to go and change sizes if he doesn't have the right sized material on hand.
Imagine going to, say, the local tyre store to get a set of four tyres fittedand when you come to pick up you get told "we only had 3 the same size so we put a different size on the other one"
bollie7
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