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Nick
Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
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Well, its not as pretty as the first version, but the weapon end looks stronger to me. Its just an educated guess, but if the whole thing is 4mm steel, its likely to be overweight with a reasonably heavy weapon bar. 2mm steel is likely to flex too much (I know 1.5mm definitely does!) You might want to look at making a flat 5mm aluminium base and a one piece steel shell.
About the weapon bearing block: I checked out my catalogues and assuming a 20mm shaft, a reasonably stong bearing has an OD of 47mm. If the block is aluminium, you would want the block to be about 70mm square. The height of most 47mm bearings is 14mm, so the minimum height of the block would be 28mm for two bearing plus 3mm for a retainer lip. If you can spare the extra weight, spacing the bearings apart will make the assembly far stronger. You can also make the assembly stonger by using a roller bearing at the bottom. they take extremely high side loads compared to roller bearings and will last longer in this application. _________________ Australian 2015 Featherweight champion
UK 2016 Gladiator champion
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Tue Jan 09, 2007 7:30 pm |
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