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<img src="http://www.pro-jump.co.uk/PJF09/PJF-tutotials.jpg" alt="Pro-Jump Forum Tutorials - Learn something new today!" border="0" height="200" width="200"></td>
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<td align="left" valign="top" width="79%"><p><span id="h1">Bearing/Bushing Mod</span><br>
<span id="h2">By Jason</span> <br> <br> I looked into replacing my worn bearings and found either plastic or rolled bronze available<br>
now due to keeping prices down these are made down to a price (nothing wrong with that makes them affordable)<br>
But if you want the best machined phospher bronze and hardened silver steel pins are the way to go <br>
Now nobody makes these as far as I know so I made a set up (if people are interested I'll post how to but it's involved)<br> <br>
Discussion topic can be found <a href="http://www.projumpforum.co.uk/index.php?topic=826.25"> <span id="link">here</span></a> </p> </td>
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<td colspan="3"><p>Although a lot of you might lack some of the tools here but the basic idea is the same as fitting any set of bearings so I thought you might find it useful and some of you might have an relative or mate who can do the machining for you</p> <br>
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<td colspan="3"><p><strong>Old bearings: you can see why they need replacing</strong></p></td>
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<p><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/oldbearing1.jpg" border="3" height="375" width="500"></p>
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<td colspan="3"><p><strong>New handmade bearings (ain't they pretty)</strong></p></td>
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<td nowrap="nowrap" width="350"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/newbearing3.jpg" border="3" height="225" width="300"></div></td>
<td width="350"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/newbearing2.jpg" border="3" height="225" width="300"></div></td>
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<td colspan="2"><p>First strip all the bearings down so you're left with just the bare frames like so (oops forgot to take pic of the spring braket stripped)</p></td>
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<td width="350"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/tborig1.jpg" border="3" height="225" width="300"></div></td>
<td width="350"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/ufb5.jpg" border="3" height="225" width="300"></div></td>
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<td colspan="2"><p><br>Next you have to ream the holes to make them round ( they are punched at the factory and sometimes come out oval also the new bearings are slightly bigger ) and then debur</p></td>
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<td><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/sbream.jpg" border="3" height="225" width="300"></div></td>
<td><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/tbream.jpg" border="3" height="225" width="300"></div></td>
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<td width="350"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/ufbream1.jpg" border="3" height="225" width="300"></div></td>
<td width="350"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/debur1.jpg" border="3" height="225" width="300"></div></td>
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<td colspan="2"><p>The top bracket has a blue plastic spacer that only goes between the bearings now to improve this I made an ally full width one to keep the frames apart (so no flex under stress)</p></td>
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<td width="349"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/tb1a.jpg" border="3" height="225" width="300"></div></td>
<td width="351"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/tb3.jpg" border="3" height="225" width="300"></div></td>
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<td><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/tb6.jpg" border="3" height="225" width="300"></div></td>
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<td colspan="2"><p>The spring bracket has the plastic roller and as the new shafts and bearings are larger this needs to be machined </p></td>
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<td width="350"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/sb4.jpg" border="3" height="225" width="300"></div></td>
<td width="350"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/sb5.jpg" border="3" height="225" width="300"></div></td>
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<td><p>Now the bearings need to be stuck in I use an anerobic retainer (it will stop them rotaton and wearing the frames )</p>
<div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/retainer1.jpg" border="3" height="225" width="300">
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<td colspan="2"><p>
The under foot one is easiest just press the bearings in and slide the new hardened tubes in ( I used grease with Molybdenum Disulphide it makes bearings last ages (like a teflon coating))<br>
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<td width="350"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/ufb6.jpg" border="3" height="224" width="300"></div></td>
<td width="350"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/ufb8.jpg" border="3" height="224" width="300"></div></td>
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<img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/grease1.jpg" border="3" height="225" width="300"></div></td>
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<img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/ufb9.jpg" border="3" height="225" width="300"></div></td>
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<td colspan="2"><p>Spring bracket same but put the plastic roller between the frames first </p></td>
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<td width="350"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/sb7.jpg" border="3" height="225" width="300"></div></td>
<td width="350"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/sb8.jpg" border="3" height="225" width="300"></div></td>
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<td colspan="2"><p>Top bracket needs the ally spacer in first but otherwise the same again</p></td>
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<td width="350"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/tb7.jpg" border="3" height="224" width="300"></div></td>
<td width="350"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/tb8.jpg" border="3" height="225" width="300"></div></td>
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<td colspan="2"><br><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/tb9.jpg" border="3" height="225" width="300"></div></td>
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<td colspan="2"><p>Finally reassemble all the bolts using grease between the bearings and inner washers</p></td>
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<td width="350"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/topbrackfin1.jpg" border="3" height="225" width="300"></div></td>
<td width="350"><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/springbrackfin1.jpg" border="3" height="225" width="300"></div></td>
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<td colspan="2"><br><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/undfootfin1.jpg" border="3" height="225" width="300"></div></td>
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<td><p><strong>The finished item infront of the first of my homemade crash mats (notice the foam for the rest)</strong></p></td>
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<td><div align="center"><img src="http://www.projumpforum.co.uk/bocking-tutorials/Jason-DIY-Bearings/fin1.jpg" border="3" height="512" width="384"></div></td>
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<td><p>I know this project is beyond anyone that does'nt have a lathe and the rest of the tooling but I hope it is of interest to a few and if anyone does decide to have a go I'll do some mesurements and drawings for them to make the bearings
The best bit is with only 2 thousanths of an inch clearence on the bearings I now get absolutely no wobble at all.</p></td>
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<span id="h2">* Disclaimer </span>
<span id="h4"><br>
Any modifications, setting up guides, advise and tutorials found on the Pro-Jump Forum should only be followed at your own risk. Pro-Jump / UK Good Deals Ltd will not be held responsible for any injury, loss or damage of any nature. Some modifications provided on the forum may also invalidate your jumping stilts warranty so please check the terms and conditions on the Pro-Jump.co.uk site or the site where your jumping stilts were purchased from. <br>
<br>
By following any of the advise set out on the Pro-Jump Forum you are exonerating the company (Pro-Jump / UK Good Deals) its employees, agents, members and the advise / tutorial poster from all liability which may arise in respect of personal injury (fatal or otherwise) or damage to your equipment which may occur by following the advise given. You undertake to make no claim against the company (Pro-Jump / UK Good Deals ltd) its employees, agents, members and the advise / tutorial poster notwithstanding that such injury was caused or occasioned directly or indirectly by the act of neglect ,or default of the company (Pro-Jump / UK Good Deals) its employees, agents, members and the advise / tutorial poster. </span></td>
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