Making Collet Blocks

[Music] hi I'm Paul Oprah and I'm glad you can join me for another episode of the shed dweller I make all sorts of parts and components in my workshop while showing you the process and the techniques I use a long way I'd also like to say hi to all of my subscribers and say thank you for your continued support and to suggest to those who have just found my channel to subscribe and click on the bell today I'm making - er 32 collet holders one is hexagonal and the other one's square the material is 6 inches long and both are cold drawn when I mount these blocks in the jaws I'm not going to set them true to the faces or the flat faces I'm going to set them as best as possible to the corners using a DTI that's sporting a 20 millimeter button I know it's not the done thing but I'm not too worried about that because either way I'll have to skim each flat face to get them fairly true later anyway I've started the process off by cleaning up the end face and then popping a center hole in to provide the usual support and guidance for later operations I'm using the rule to get my spigot shoulder-length a set to approximately 30 mil it's my intention also to put to gauge or setting paths on each block one at each end this is to enable me to do some fine-tuning later as I get to the grunning process meanwhile knocking the corners off is making chips that are small and fast enough they're coming off line with a lot bullets [Music] still although I've only set the blocks up using DTI over the top corners and does not progress down the spigot diameter to the point that the intermittent cut is almost over us stopped the machine just to take a look at the lens and they were to my surprise pretty even width I took the thread each section and speak it down to 40 millimeters despite knowing that I'd have to hold this material by this spigot later to do the other end I suppose I could have done the other end first on this one after I hadn't got my thinking cap on during the decision-making process then even during the threaded end as the second operation it would have still had to have been taken out of the chalk while a set looked the compound slide for the eighth degree setting and I can't help the compound slide set to eight degrees because the compound slide and the tailstock occupy the same space at certain times as you can see the next operation needs to drill right through but because the material is six inches long I haven't got anything at 20 millimeters it'll go right through so I'm going to have to drill through from both ends and hope they meet up in the center now it's time for the second end after facing off and piloting the end face I went back to making them little hot bullets while they're making the second but smaller spigot [Music] I'm just using a 45 degree tool to knock the corner off this spigot finishing a through-hole using the drill went well that is to say it went through without any problems as it broke through here I'm using a deburring tool in the wall just polishing the spigot up with some Emery paper to make it a bit easier for the DTI to read here I'm using my cheap Chinese collet holder for the mill that's to assist me with setting up the compound slide of 8 degrees I used a 10 millimeter boring bar to reach right into the ball but because it's such a small boring bar that cuts have to be very light to reduce the amount of vibration that was produced the insert is a very positive rake insert in order to make the cut as clean as I could possibly get even so I still had to do a little bit of polishing with Emery paper after had achieved the correct colic depth before I started and after I had finished the collet tapered bore I confirmed concentricity using the polished spigot behind the thread using a DTI after the final check to confirm that the colic fits it's time to calculate the the thread cutting dimensions I went on the internet for the thread dimensions for an ER 32 um collet holder and the thread is 40 by 1.5 millimeter pitch I've done this before on a collet holder for my clerks and tall cutter grinder but I didn't show how had calculated it I hope this helps hit pause if you want more time to view it at the end of the twenty millimeter long thread I put that thread relief to prevent breaking the thread insert and to separate the thread from the setting shoulder all disfigured after the first few tentative cuts using my thread cutter I started to get a bit brave and our rent of the cutting speed the finish is wonderful but I soon found that I may have been pushing my look a bit too far I found myself wanting to use the tailstock with a live centering to steady the end of the workpiece just to prevent the chalk letting it go but there wasn't anything to hold on to so it was time to get my budge thinking cap on to find a way around this I sorted this problem by shoving a long bolt down the chuck tube and put a thick washer on the other end and locked it all not with a large knot after machining the end of the bolt to make a face I used the center drill to spot it and then the live Center work to treat this prevented me taking the material out of the jock and I kept all of my settings for the remainder of the thread without any problems the high speeds are used for cutting the thread made for a very good finish despite this the Colt not only went on by a few threads that was before I realized I hadn't cleaned the dirt out of the threads themselves a quick blast with the airgun solved the problem and the knot went on with very little friction and that in itself would wear off in time well that's the first one done and notes to do the square one [Music] you [Music] [Music] [Music] now I'm uncovering my homemade surface plate before putting any of these parts on the surface plate I just stone them all down zip get rid of anything that could scratch the surface plate nothing really there now I can check to see how far out the phases are in relation to the two spigots and really they're not that bad at the most I had 2,000 the diamond addressed they will to a coarse finish dressing the wheel coarse help prevent vibration marks that that show up in the material they didn't eradicate it all it just reduced it the reason is because the both of the bits of material have a very slight or very small taper to them the taper correction is going to be provided by cigarette paper and this has the ability to cause a little less stability I know that if I'd addressed the wheel to a fine finish the surface of both of these blocks would look a bit like the pattern of a Mandelbrot set after all faces were surface ground using the DTI confirmed that the spigot at both ends was indeed central their way out job done thanks for watching bye [Music]

Channel: the shed dweller

Views: 204,065

Keywords: Collet block, Hexagon collet block, square collet block, ER32 collet blocks, DIY collet blocks, diy collet blocks, diy hexagon collet block, diy square collet block, diy er32 collet blocks, hex collet blocks

Id: Letjbux6qxA

Length: 13min 54sec (834 seconds)

Published: Wed Apr 01 2020