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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Brake Drum Cracked.
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<blockquote data-quote="Vincent Brake" data-source="post: 9377" data-attributes="member: 398"><p><strong>Cast drums crack</strong></p><p></p><p>Hi Guys, they are cracking as you bolt them on the hub.</p><p>1s there is the unevenness in bolting torking them down.</p><p>2nd there is unevenness as you tighten it down to the spokes (where the 90deg bend is) and couse a great offsett force on them. </p><p>3rd surface on pressed steel spoke flange isnt flat but uneven.</p><p>4 its mostly ****y material (GG 25)</p><p> </p><p>This all is also the case why hubs (cast ones) are cracking also</p><p> </p><p>The srongest part is the steel soke flange as it gives way (mostly) without giving in</p><p> </p><p>so take care and have them bolting down as they have contact under the bolting surfrace and not beside it, as it creates a bending force on the drums, cousing the crack.</p><p> </p><p>Best regards</p><p> </p><p>Vincent Speet Brake<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="Vincent Brake, post: 9377, member: 398"] [b]Cast drums crack[/b] Hi Guys, they are cracking as you bolt them on the hub. 1s there is the unevenness in bolting torking them down. 2nd there is unevenness as you tighten it down to the spokes (where the 90deg bend is) and couse a great offsett force on them. 3rd surface on pressed steel spoke flange isnt flat but uneven. 4 its mostly ****y material (GG 25) This all is also the case why hubs (cast ones) are cracking also The srongest part is the steel soke flange as it gives way (mostly) without giving in so take care and have them bolting down as they have contact under the bolting surfrace and not beside it, as it creates a bending force on the drums, cousing the crack. Best regards Vincent Speet Brake:) [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Brake Drum Cracked.
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