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January 28th, 2019, 12:44 PM   #671
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I was more thorough this time with cleaning and grinding before welding. Hopefully the welds do not look, too much, like a birds crap...

Afterwards the casings were aged 24h at 100degC in the oven, spreading a "popular" scent of racing in the kitchen.

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February 6th, 2019, 10:58 AM   #672
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Although the previous counter balancer was more surreal, I like the new cb more...

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February 7th, 2019, 03:27 PM   #673
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So is it just a matter of Assembly now?
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February 8th, 2019, 10:04 PM   #674
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Originally Posted by polska View Post
So is it just a matter of Assembly now?
Not quite. The CB housings are welded onto the crank cases. Now they are at the machinist to get the final touch to bearing seats and sealing surfaces. After positioning, welding, ageing, the material moves around a bit. As the tolerances are of the essence, I have left about 0,5mm for the final machining on critical surfaces. Also the cover remains to be machined.

THEN, it's a matter of assembly!

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February 9th, 2019, 12:43 AM   #675
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There's a bit of Salvador Dali about that counter balancer Dr_C!
All that local welding doesn't affect casing alignment?
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February 9th, 2019, 02:03 PM   #676
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Hi guy's,

My concern wont be the casing tolerances , but the counter shaft diameter , thinking about the force created by the outer masse at the max revs makes me worry a bit , may the shaft be hard enough not to bend , but you know what , we will see

anyhow ,this is an vey nice job


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Last edited by fdracing; February 9th, 2019 at 02:13 PM.
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February 10th, 2019, 01:40 PM   #677
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Originally Posted by fdracing View Post
Hi guy's,

My concern wont be the casing tolerances , but the counter shaft diameter , thinking about the force created by the outer masse at the max revs makes me worry a bit , may the shaft be hard enough not to bend , but you know what , we will see

anyhow ,this is an vey nice job


.
Thanks!
Simulations of the previous CB design showed the radial bending at 9000rpm to be 0,22mm. This time I have added 2mm on the shaft diameter. Radial clearance is appr. 1,0mm between CB and crankshaft. There was no problem with this in the last attempt.

Fingers crossed, please!

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