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Er 16 Sherline
Jo:
24 piece ER16 collet set with (claimed :thinking: ) 0.008mm accuracy: https://www.aliexpress.com/item/1005003334442281.html?spm=a2g0o.productlist.main.5.337c3ebaljC0Sd&algo_pvid=9f74b7a3-6b40-4f51-ba50-dcd1dcc4226f&algo_exp_id=9f74b7a3-6b40-4f51-ba50-dcd1dcc4226f-2&pdp_npi=4%40dis%21USD%218.90%210.49%21%21%2164.00%21%21%4021038edc16914839481503629e07c2%2112000025271557743%21sea%21UK%210%21A&curPageLogUid=Kpd2CfyLqr3z $114 A$ + $1.43 shipping.
They do the set of oversized collets cheap as well.
Yes chinese but they normally post cheap all over the world. Replace any that have unacceptable run out later...
Jo
paul gough:
Thanks Jo, For that price a full set is something to consider as it is only equal to the cost of three of my vertex collets. Regards, Paul Gough.
Jasonb:
looking at one of the other listings at the bottom of Jo's link there are 0.005micron for less money though not in the over or half sizes.
We get tax added to those prices at source these days but there are still some good buys and they seem to arrive earlier than quoted.
paul gough:
Thanks for spotting this Jason. It seems I will have to explore internet vendors offerings to a much greater extent than just the local engineering suppliers if I am to get better pricing.
We are subject to GST of 10% before being released by customs if the item is over $1000 Australian dollars. Carriage charges for small items, eg some screws and suchlike from Knupfer in Germany or even single smaller items from Sherline in the US are tolerable but to bring in a Reeves set of castings for a loco would be very painfull to the pocket and probably the same from the US. Regards, Paul Gough.
Stan Stocker:
--- Quote from: paul gough on August 07, 2023, 10:26:16 AM ---Here is an image of the sherline that arrived about a month ago. It is the 8'' metric version with an ER 16 spindle headstock. ER 16 collets go to 10mm or 3/8". Sherline produce their various chucks with an ER 16 thread option, ie 22 x 1.5. For my uses the Vertex collets in this spindle are very accurate and I can achieve close tolerances to a few hundredths of a mm without going to any effort, ample for my purposes. I am sure a competent machinist and perhaps some careful lapping of collets and spindle could give accuracies that would please even the most demanding modeller. Perhaps the most useful application of this headstock might be in the milling machine where it would eliminate the need for a jacobs chuck or some of the other holders which would provide more z axis space. It does mean only 22 x 1.5 mm thread atachments can be screwed directly to the spindle and also any tooling has to be cylindrical to go into the collets though. Regards, Paul Gough.
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The Sherline three jaw chuck in an M22 x 1.5 is a very nice chuck should you be contemplating one. When still in the clock restoration business an ER16 lathe and this chuck were my default machines for most any task that would fit. It is important to keep track of having anough work inserted into the ER16 collet. If thin work is held at the face of the collet the rear of the collet will close down excessively. End result is that the work squirts out the front, the run out is excessive, and / or the collet is damaged. My little 4 axis Sherline CNC mill has the ER16 spindle and the 10K pulleys, they do make very nice stuff.
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