{"product_id":"rotary-stage-60mm","title":"Rotary stage, 60 mm, 360 degrees","description":"\u003cp\u003eAn XY stage moves the work in a straight line. This one turns it, by a measured amount, and holds the angle while you work.\u003c\/p\u003e\n\u003cp\u003e60 by 60 mm aluminium platform, full 360 degree rotation, driven by a differential micrometer head.\u003c\/p\u003e\n\u003ch3\u003eWhat the maker publishes\u003c\/h3\u003e\n\u003cp\u003eThese are the seller's figures, and unusually for this class of part they publish the whole set rather than a model number and a shrug:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRotation: 360 degrees, continuous\u003c\/li\u003e\n\u003cli\u003eMinimum scale: 0.01 mm on the micrometer head\u003c\/li\u003e\n\u003cli\u003eFine travel: plus or minus 6.5 mm at the drive\u003c\/li\u003e\n\u003cli\u003eLoad: 29.4 N, which is 3 kgf\u003c\/li\u003e\n\u003cli\u003eBody: aluminium alloy\u003c\/li\u003e\n\u003cli\u003eMass: 0.16 kg for the stage, 0.3 kg shipped\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy a rotary stage and not just turning the part\u003c\/h3\u003e\n\u003cp\u003eBecause unclamping is where the position goes. Once a part is held, every time you free it to turn it you lose the datum you set. A rotary stage turns the whole clamp - part, vise and all - so the centre stays where it was and only the angle changes. That is how you drill a bolt circle, or a row of holes at 15 degrees, and have them come out where you meant.\u003c\/p\u003e\n\u003cp\u003eThe differential head is the reason the small movements work. A coarse thread gets you near, a fine one closes the last fraction, and the 0.01 mm scale is what you read while you do it.\u003c\/p\u003e\n\u003ch3\u003eWhere it stops\u003c\/h3\u003e\n\u003cp\u003e3 kgf is the published load. That is a small vise and a small part, not a lump of steel.\u003c\/p\u003e\n\u003cp\u003eThis is an optical-bench part by origin, not a machine-tool part. It positions; it does not resist cutting force. Side load from anything that bites will move it, and that is not what it is for.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWe have not stacked this on our own XY Stage, 60 mm.\u003c\/strong\u003e Both are 60 mm platforms from the same industrial family and the mounting convention is common to it, but we have said it before on pages where we should not have, and we are not going to say it again on a guess. When we have both on the bench and bolted together, this paragraph gets replaced with a photograph.\u003c\/p\u003e\n\u003cp\u003eThe seller does not publish the tapped hole sizes or their spacing. Neither does anyone else in this category - we asked the question across the whole supply side and got nothing. If the hole pattern decides your purchase, write to us before you order.\u003c\/p\u003e","brand":"Mikrabench","offers":[{"title":"Default Title","offer_id":47513362170047,"sku":null,"price":119.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0760\/5826\/3743\/files\/S8fca6af260fa47929cd7910915e40a73V.webp?v=1789885623","url":"https:\/\/arvonelle.com\/products\/rotary-stage-60mm","provider":"ARVONELLE","version":"1.0","type":"link"}