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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Gearbox pinion hardness
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<blockquote data-quote="oexing" data-source="post: 109587" data-attributes="member: 1493"><p>Salü Vincent,</p><p>not quite knowing the shape of your items I would not go higher than 60 HRC, 58 will be allright, as when you look up bearing details in SKF literature they accept anything above 58 HRC for full load calculations - without allowances due to low hardness. </p><p> Whenever you have to deal with delicate parts that need case hardening you better only do minimum machining - roughing - and keep a minimum of one millimeter on all dimensions - except on faces that you like to have case hardened. So you ask just and exclusively for carbonising the parts BUT NO hardening yet. After that collect your parts, machine them to final or grinding sizes and only then send them for vacuum/inert gas hardening. </p><p> My conrods were 1.6587 , case hardening steel, 18CrNiMo7-6 . You can get it from our Ebay as well. You are busy with your starter mod ? </p><p></p><p> Vic</p><p><a href="https://www.ebay.de/itm/Edelbaustahl-1-6587-18CrNiMo7-6-TH-120-135-Rundmaterial-Rundstahl/112553937202?hash=item1a34bcc932:m:mFbFzb2xLSKPM0K8yFc-uqw" target="_blank">1.6587</a></p></blockquote><p></p>
[QUOTE="oexing, post: 109587, member: 1493"] Salü Vincent, not quite knowing the shape of your items I would not go higher than 60 HRC, 58 will be allright, as when you look up bearing details in SKF literature they accept anything above 58 HRC for full load calculations - without allowances due to low hardness. Whenever you have to deal with delicate parts that need case hardening you better only do minimum machining - roughing - and keep a minimum of one millimeter on all dimensions - except on faces that you like to have case hardened. So you ask just and exclusively for carbonising the parts BUT NO hardening yet. After that collect your parts, machine them to final or grinding sizes and only then send them for vacuum/inert gas hardening. My conrods were 1.6587 , case hardening steel, 18CrNiMo7-6 . You can get it from our Ebay as well. You are busy with your starter mod ? Vic [URL='https://www.ebay.de/itm/Edelbaustahl-1-6587-18CrNiMo7-6-TH-120-135-Rundmaterial-Rundstahl/112553937202?hash=item1a34bcc932:m:mFbFzb2xLSKPM0K8yFc-uqw']1.6587[/URL] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Gearbox pinion hardness
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