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22mm dia hole and getting a correct distance on a mill?
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<blockquote data-quote="PuG" data-source="post: 6856924" data-attributes="member: 55620"><p>Good morning, morse taper 4. The mill:</p><p>[URL unfurl="true"]https://www.cormak.pl/gb/drilling-and-milling-machines/1037-cormak-zx-7055-milling-and-drilling-machine.html[/URL]</p><p></p><p>What I decided last night was to have 20mm holes cut (marked at 15 for the moment) with the laser, then end mill straight to 22mm given Drill Service (Horley) Ltd offer an extra long bit to a high tolerance reasonably priced (£35). But I hadn't thought about the steel being hardened by the heat cycle. I suppose I could anneal it.</p><p></p><p>Thanks for the suggestions, its good but I'm not keen on using a boring head. I would prefer to end mill to say 21 then use a reamer to finish. I've found several to the right size and length, bit more expensive. I do have a massive box of them from Grandpa which I need to rummage through to see what he had.</p><p></p><p>Lastly a hollow mill bit like below:</p><p>[URL unfurl="true"]https://www.amazon.co.uk/Ruko-Terrax-Core-Drill-Weldon/dp/B003IHVCMM?ref_=fsclp_pl_dp_2&th=1[/URL]</p><p></p><p>Just there too short but I could prep a hole smaller dia instead of laser cutting, then try and end mill.</p><p></p><p>Regardless my mill only goes to 125mm depth on the spindle so I'm going to have to move the tooling or leave an end cap which actually suits me.</p><p></p><p>Thanks for the replies, ideas.</p><p></p><p></p><p>[ATTACH=full]867979[/ATTACH]</p></blockquote><p></p>
[QUOTE="PuG, post: 6856924, member: 55620"] Good morning, morse taper 4. The mill: [URL unfurl="true"]https://www.cormak.pl/gb/drilling-and-milling-machines/1037-cormak-zx-7055-milling-and-drilling-machine.html[/URL] What I decided last night was to have 20mm holes cut (marked at 15 for the moment) with the laser, then end mill straight to 22mm given Drill Service (Horley) Ltd offer[B] [/B]an extra long bit to a high tolerance reasonably priced (£35). But I hadn't thought about the steel being hardened by the heat cycle. I suppose I could anneal it. Thanks for the suggestions, its good but I'm not keen on using a boring head. I would prefer to end mill to say 21 then use a reamer to finish. I've found several to the right size and length, bit more expensive. I do have a massive box of them from Grandpa which I need to rummage through to see what he had. Lastly a hollow mill bit like below: [URL unfurl="true"]https://www.amazon.co.uk/Ruko-Terrax-Core-Drill-Weldon/dp/B003IHVCMM?ref_=fsclp_pl_dp_2&th=1[/URL] Just there too short but I could prep a hole smaller dia instead of laser cutting, then try and end mill. Regardless my mill only goes to 125mm depth on the spindle so I'm going to have to move the tooling or leave an end cap which actually suits me. Thanks for the replies, ideas. [ATTACH type="full"]867979[/ATTACH] [/QUOTE]
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22mm dia hole and getting a correct distance on a mill?
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