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<blockquote data-quote="Magnetoman" data-source="post: 149975" data-attributes="member: 2806"><p>I spent some quality time with my rear hub today. The measurements that are relevant for this current thread are below.</p><p></p><p>I was able to remove four spokes from the hub on one side of the wheel despite the gap between the spoke flange and hub being smaller than the diameter of the head. The reason this was possible is shown in the next photograph.</p><p></p><p>[ATTACH=full]46520[/ATTACH]</p><p></p><p>The head is too large to go straight into those four slots, but it was no problem inserting them at an angle and rotating as I pushed them into place. No force was used. However, it wasn't possible to slide neighboring spokes to the place where I was able to remove them because the clearance was too tight. So, I decided to measure the relevant gap at all 20 spoke slots. For this my sacrificial Chinese gage block set was ideal.</p><p></p><p>As shown in the next photograph, using the 0.200" and 0.250" gage blocks, along with a feeler gage, it was possible to measure the relevant gaps through which a spoke would have to pass.</p><p></p><p>[ATTACH=full]46521[/ATTACH]</p><p></p><p>Note that the gage block is pushed in further than the feeler gage, which only measures the gap at the edge of the slot closest to the outside.</p><p></p><p>The next chart shows all 20 measurements for both sides of the hub, with both sets of ten recorded on the same chart for simplicity.</p><p></p><p>[ATTACH=full]46522[/ATTACH]</p><p></p><p>Both sides of the wheel are recorded on the same chart for convenience, but there is no relationship between the orientations on the two sides. As can be seen, because of the twisting motion, spoke heads of diameter ~0.280" could be removed through gaps as small as 0.255".</p><p></p><p>The other feature of note is how much the gaps vary on both sides of the hub. However, how much of this is due to variations in the spoke flanges, and how much is due to variations in the faces of the brake hubs, will have to await me removing the spoke flanges and measuring them on the surface plate (keeping track of which brake drum each goes with, as well as how the holes are indexed with respect to each other.</p></blockquote><p></p>
[QUOTE="Magnetoman, post: 149975, member: 2806"] I spent some quality time with my rear hub today. The measurements that are relevant for this current thread are below. I was able to remove four spokes from the hub on one side of the wheel despite the gap between the spoke flange and hub being smaller than the diameter of the head. The reason this was possible is shown in the next photograph. [ATTACH type="full"]46520[/ATTACH] The head is too large to go straight into those four slots, but it was no problem inserting them at an angle and rotating as I pushed them into place. No force was used. However, it wasn't possible to slide neighboring spokes to the place where I was able to remove them because the clearance was too tight. So, I decided to measure the relevant gap at all 20 spoke slots. For this my sacrificial Chinese gage block set was ideal. As shown in the next photograph, using the 0.200" and 0.250" gage blocks, along with a feeler gage, it was possible to measure the relevant gaps through which a spoke would have to pass. [ATTACH type="full"]46521[/ATTACH] Note that the gage block is pushed in further than the feeler gage, which only measures the gap at the edge of the slot closest to the outside. The next chart shows all 20 measurements for both sides of the hub, with both sets of ten recorded on the same chart for simplicity. [ATTACH type="full"]46522[/ATTACH] Both sides of the wheel are recorded on the same chart for convenience, but there is no relationship between the orientations on the two sides. As can be seen, because of the twisting motion, spoke heads of diameter ~0.280" could be removed through gaps as small as 0.255". The other feature of note is how much the gaps vary on both sides of the hub. However, how much of this is due to variations in the spoke flanges, and how much is due to variations in the faces of the brake hubs, will have to await me removing the spoke flanges and measuring them on the surface plate (keeping track of which brake drum each goes with, as well as how the holes are indexed with respect to each other. [/QUOTE]
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