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Farm Machinery
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22mm dia hole and getting a correct distance on a mill?
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<blockquote data-quote="tinman" data-source="post: 6858389" data-attributes="member: 11821"><p>The tallguy and I are on the same page here.</p><p>Drill the two plates together then assemble in a jig, get 2 lugs/wings cut on the spacer plate either side and matching holes in the plates to aid in assembly before welding, make a jig to hold everything including 21.98 pins in place to keep it all aligned, tack it in places to prevent too much of a pull and weld other side to compensate the pull from the tacks, dont go welding it all on one side and expect the other side to pull it back when its welded.</p><p></p><p>keep the wings depth to say 15mm so when they would fit into the 20mm plate you have 5mm of a void to fill with weld, it ill look more professional.</p><p></p><p>thing is, its a very heavy bracket in total to be having needle roller bearings that size in it, could you get away with plain teflon coated bearings, they will press into a straight size, ie 22mm, i dont know whats expected of the shaft through the needle bearings so cant say really.</p><p></p><p>To give you an idea, this is a jig i made up a few weeks ago, pins turned down to set a height to keep all parts aligned, also for repetition, lugs on the jig welded solid so it could all be assembled and bolted tight together with a shim to allow for free movement after welding and to allow for any slight distortion, a jig is the way to go for repetitive work.</p></blockquote><p></p>
[QUOTE="tinman, post: 6858389, member: 11821"] The tallguy and I are on the same page here. Drill the two plates together then assemble in a jig, get 2 lugs/wings cut on the spacer plate either side and matching holes in the plates to aid in assembly before welding, make a jig to hold everything including 21.98 pins in place to keep it all aligned, tack it in places to prevent too much of a pull and weld other side to compensate the pull from the tacks, dont go welding it all on one side and expect the other side to pull it back when its welded. keep the wings depth to say 15mm so when they would fit into the 20mm plate you have 5mm of a void to fill with weld, it ill look more professional. thing is, its a very heavy bracket in total to be having needle roller bearings that size in it, could you get away with plain teflon coated bearings, they will press into a straight size, ie 22mm, i dont know whats expected of the shaft through the needle bearings so cant say really. To give you an idea, this is a jig i made up a few weeks ago, pins turned down to set a height to keep all parts aligned, also for repetition, lugs on the jig welded solid so it could all be assembled and bolted tight together with a shim to allow for free movement after welding and to allow for any slight distortion, a jig is the way to go for repetitive work. [/QUOTE]
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22mm dia hole and getting a correct distance on a mill?
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