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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Splitting Crankcases
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<blockquote data-quote="Vincent Brake" data-source="post: 6787" data-attributes="member: 398"><p><strong>machining</strong></p><p></p><p>Hi there,</p><p>I have machined my D casings as follows:</p><p>1 have your mating surfaces flat (this took me the greater part in time) They are always bent a little like 0,05-0,3 mm</p><p>2 bolt them up, alline them, and ream the 3 hollow mating pins (later you requires new ones)</p><p>3 on CNC milling machine alline the main and output bearing holes in a strait to the machine axis, be sure to not bend the whole set up as you fix it. (best bolt through some casing bolt holes, with hollow adjusters under)then aline the holes of the bearings in the vertical plane (both in X and Y direction)</p><p>4 have your casing drawings ready and machine each 27.5 degr 0,3 mm of and see how much you really took off. (do this with a milling device of say each stepped cut 5-6 mm, and big enough diameter say 50 mm, as your fixings will not stand milling at a stepped height of 30mm (it will vibrate to much)</p><p>5 all this took me (incl inline drilling of the main bearings, timeing side holes etc.) about 160 H but then you get some</p><p> </p><p>any more questions please ask I also have extended Photos on it, and more descriptions.</p><p> </p><p>Best regards and safe spannering</p><p> </p><p>Vincent (brake) Speet</p></blockquote><p></p>
[QUOTE="Vincent Brake, post: 6787, member: 398"] [b]machining[/b] Hi there, I have machined my D casings as follows: 1 have your mating surfaces flat (this took me the greater part in time) They are always bent a little like 0,05-0,3 mm 2 bolt them up, alline them, and ream the 3 hollow mating pins (later you requires new ones) 3 on CNC milling machine alline the main and output bearing holes in a strait to the machine axis, be sure to not bend the whole set up as you fix it. (best bolt through some casing bolt holes, with hollow adjusters under)then aline the holes of the bearings in the vertical plane (both in X and Y direction) 4 have your casing drawings ready and machine each 27.5 degr 0,3 mm of and see how much you really took off. (do this with a milling device of say each stepped cut 5-6 mm, and big enough diameter say 50 mm, as your fixings will not stand milling at a stepped height of 30mm (it will vibrate to much) 5 all this took me (incl inline drilling of the main bearings, timeing side holes etc.) about 160 H but then you get some any more questions please ask I also have extended Photos on it, and more descriptions. Best regards and safe spannering Vincent (brake) Speet [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Splitting Crankcases
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