{"id":103,"date":"2017-11-10T12:27:00","date_gmt":"2017-11-10T12:27:00","guid":{"rendered":"http:\/\/euro-bearings.com\/blog\/?p=103"},"modified":"2017-11-10T12:27:00","modified_gmt":"2017-11-10T12:27:00","slug":"how-to-use-vee-bearings-and-t-rails","status":"publish","type":"post","link":"https:\/\/euro-bearings.com\/blog\/how-to-use-vee-bearings-and-t-rails\/","title":{"rendered":"How to use Vee bearings and T-rails"},"content":{"rendered":"

\"\"Our Vee bearings and T-rails offer the user a simple way of constructing smooth running linear systems with a high load capacity and, in the case of the stainless steel version, corrosion resistance too.\u00a0For this example we are selecting the following parts:<\/p>\n

4 pcs EV W3X<\/strong> ( Vee Bearings)<\/p>\n

2 pcs MB3<\/strong> (Metric bore Concentric bush)<\/p>\n

2 pcs MB3X<\/strong> (Metric bore Eccentric bush)<\/p>\n

2 pcs T-3 x 1000mm<\/strong> ( T-3 rails 1 metre long)<\/p>\n

The first thing to do is to decide the width of the track and then choose what material the T-rail will be attached to.\u00a0In this example (see drawing) we have selected a piece of steel or aluminum 50mm wide and 1 metre long. Let\u2019s call this the \u201csupport\u201d.\u00a0The precision of the system is dictated by how accurately this support material is manufactured.<\/p>\n

The Rail and Support<\/u><\/strong><\/p>\n

Drilling the T-rail is easy. The flats are not hardened, only the tip of the vee, so normal drilling techniques can be used.\u00a0Our preference is to clamp the T-rail to the support material and to drill pilot holes through the T-rail into the support. This means the centres will match.\u00a0Double check that the T-rail edges are still parallel.\u00a0Then drill through holes in the T-rails and drill and tap the support.<\/p>\n

Finally bolt the T-rail onto the support. We tend to use dome head machine screws. Make sure the screw heads do not interfere with the carriage or rail edges. Also make sure that the rail edges are parallel.<\/p>\n

\"\"<\/p>\n

The Carriage and Bearings<\/u><\/strong><\/p>\n

In this example we are making a carriage 150mm x 150mm with 4 no. W3X<\/strong> bearings.\u00a0So again, select the material, steel or aluminium, for the carriage.\u00a0The hole centre positions for the bearings (dimension \u201cA\u201d on the drawing)\u00a0can be calculated as:<\/p>\n

A<\/strong> = Width of support + 2 x\u00a0TE<\/strong> + 2 x\u00a0A1<\/strong><\/p>\n

The value for dimension TE<\/strong> can be found here http:\/\/www.euro-bearings.com\/veerails.htm<\/a>\u00a0(TE in this case is 6.35mm).<\/p>\n

And the value for dimension A1<\/strong> can be found here http:\/\/www.euro-bearings.com\/veesizes.htm<\/a>\u00a0(A1 in this case is 19.05mm).<\/p>\n

NOTE: Dimension\u00a0TE<\/strong> is the offset of tip of Vee rail from the support material.\u00a0A1<\/strong> is the dimension from centre of bearing to bottom of Vee.\u00a0In our example this is 50 + (2x 6.35) + ( 2 x 19.05) = hole centres 100.8mm.<\/p>\n

The eccentric bush MB3X<\/strong> allows 1.07mm of lateral adjustment.<\/p>\n

Drill the holes through the carriage plate at 100.8mm centres (in this case 8.2mm diameter clearance holes for the M8 bolts we will use to secure the bearings).<\/p>\n

Insert the concentric bushes into 2 bearings and insert the eccentric bushes into\u00a02 bearings. Firmly secure the concentric bushed bearings to one side of the carriage plate and tighten.\u00a0Loosely assemble the eccentric bushed bearings to the carriage plate\u00a0and slide the carriage onto the T-rails. Now adjust the eccentric bushed bearings by feel (or feeler gauge) to achieve the pre-load required.\u00a0Slide the carriage back & forth to ensure there are no pinch points.\u00a0It is recommended to use hex cap head bolts and nyloc nuts through each bearing bush.<\/p>\n

IMPORTANT: Make sure the outer ring of the bearing is turning on the inner ring of the bearing and NOT on the bush. The bearing should be an interference fit onto the bush.<\/p>\n","protected":false},"excerpt":{"rendered":"

Our Vee bearings and T-rails offer the user a simple way of constructing smooth running linear systems with a high load capacity and, in the case of the stainless steel version, corrosion resistance too.\u00a0For this example we are selecting the following parts: 4 pcs EV W3X ( Vee Bearings) 2 pcs MB3 (Metric bore Concentric […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,14],"tags":[15],"class_list":["post-103","post","type-post","status-publish","format-standard","hentry","category-general","category-vee-bearings","tag-vee-bearings"],"_links":{"self":[{"href":"https:\/\/euro-bearings.com\/blog\/wp-json\/wp\/v2\/posts\/103","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/euro-bearings.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/euro-bearings.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/euro-bearings.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/euro-bearings.com\/blog\/wp-json\/wp\/v2\/comments?post=103"}],"version-history":[{"count":5,"href":"https:\/\/euro-bearings.com\/blog\/wp-json\/wp\/v2\/posts\/103\/revisions"}],"predecessor-version":[{"id":112,"href":"https:\/\/euro-bearings.com\/blog\/wp-json\/wp\/v2\/posts\/103\/revisions\/112"}],"wp:attachment":[{"href":"https:\/\/euro-bearings.com\/blog\/wp-json\/wp\/v2\/media?parent=103"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/euro-bearings.com\/blog\/wp-json\/wp\/v2\/categories?post=103"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/euro-bearings.com\/blog\/wp-json\/wp\/v2\/tags?post=103"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}