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| How do I measure an adjustable reamer? |
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| NickG:
Thanks guys, I bored the hole 5 thou undersize, it actually measured 6 thou under. I tried setting the reamer to 5/8" last night with the mic and I haven't tried reaming it yet but the first bit of the reamer went into the bore, would there be a built in taper on this type of reamer to help get started? At the end of the day, the size isn't critical, as long as I don't start getting too large and making the wall thin. I purposely left the cooling grooves a bit shallower incase things go wrong and I need to go up anyway though. I will just do maybe 3 2 thou cuts until I get an acceptable finish etc. Thanks again, Nick |
| websterz:
--- Quote from: NickG on February 02, 2010, 11:10:51 AM ---Thanks guys, I bored the hole 5 thou undersize, it actually measured 6 thou under. I tried setting the reamer to 5/8" last night with the mic and I haven't tried reaming it yet but the first bit of the reamer went into the bore, would there be a built in taper on this type of reamer to help get started? At the end of the day, the size isn't critical, as long as I don't start getting too large and making the wall thin. I purposely left the cooling grooves a bit shallower incase things go wrong and I need to go up anyway though. I will just do maybe 3 2 thou cuts until I get an acceptable finish etc. Thanks again, Nick --- End quote --- Especially so with an adjustable reamer, the first part in the hole does all the cutting. :dremel: Rather than make a full depth cut only go .100" or so deep and then check the size. Adjust and repeat, going an additional .100" beyond the previous test cut to insure you are getting a full bite with the reamer. |
| kellswaterri:
Hi Nick, yes, there is a slight inbuilt taper, which means that you must ream right through the bush or bore...take small cuts, about 2 thou. at a time...as long as there are no slits or cuts in the bore length for the blades to fall into you will be ok...remember that these reamers have loose blades ''renewable'' and they are controlled by the adjusting nuts at each end which have an female taper fitting over the ends of the blades and holding them in position, one for adjusting out and one for in ''large or small diam.'' I usually pick a reamer spec. midway between the size I am going to cut, wind the blades down in diam. by slackening the nut and pushing all the blades in to seat in the slots of the reamer then bring the other nut down to lock the blades into position... if the leading part of the reamer enters the bush/bore by 1/2---1'' check all nuts are nipped up front and back and apply some oil then proceed to ream right through...the taper is only a few thou so I reckon on about 3-4 thou. per go. All the best , John. |
| NickG:
Thanks for the advice guys, I will set my reamer up to do just that. Luckily it is mid size. Cheers, Nick |
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