Adding a Brake Flange - Page 2 - Fiberglass RV


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Old 01-25-2013, 07:42 AM   #15
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Originally Posted by Brian B-P View Post
That makes sense, but UCF builds their Flexiride "rubber torsion" suspension arms with the brake mounting flange integrally cast as part of the arm... there are design choices here so assumptions are dangerous.
See UCF's Flexiride 3500 axle leaflet for an illustration.
Clearly, this is correct for the Flexiride. As the arms are replaceable, one could add new arms with flanges to avoid replacing the whole axle assembly, though it appears that the flanges may be standard.


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Excellent info, Tom. : The normally informative Dexter Axle site doesn't clearly show a flange-equipped Torflex that I could find.

This means that a flange could be added to the spindle, but readily available flanges for adding to beam axles will still have the wrong size hole to fit the spindle (unless a Torflex spindle in our sizes has a huge diameter). Also, these axles come with regular and long spindles, so length should be checked for enough room to add the flange in the right position.
I looked at the Scamp owners manual (an excellent piece of work by the way). They show grease seal inner diameters of 1.5" and 1.719". As the brake flange sits on the next larger diameter, the ID of the brake flange needs to be bigger, but I was unable to find the diameter of this portion of the spindle. The readily available flanges I found had inner diameters of 1.64",1.69",1.75" and 2.27".

This would be an easy part to fabricate (a 1/4" plate with 5 holes) but it would be nice if the parts were available off the shelf. Surely they are mass produced to meet the OEM demand.

If anyone has a Dexter axle and could measure the diameter of the spindle where the brake flange attaches, it would be nice to add it to this discussion for future reference.
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Old 01-25-2013, 09:21 AM   #16
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The readily available flanges I found had inner diameters of 1.64",1.69",1.75" and 2.27".
Good stuff :

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Originally Posted by Thomas G. View Post
This would be an easy part to fabricate (a 1/4" plate with 5 holes) but it would be nice if the parts were available off the shelf. Surely they are mass produced to meet the OEM demand.
Yes, Dexter must have them; unfortunately that doesn't mean they are added by anyone ex-factory, or that they are available at retail. Cross your fingers...

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If anyone has a Dexter axle and could measure the diameter of the spindle where the brake flange attaches, it would be nice to add it to this discussion for future reference.
Yes! Real information is good.

This helpful person could also check the length of the spindle.
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Old 01-25-2013, 09:33 AM   #17
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I pulled this sketch off Goggle images to show where the flange welding location is relative to the rubber. I've done a fair amount of oxy-acetelyne and arc welding. I would be confident that I could arc weld the flange onto the spindle without heating up the rubber components.

If you have different experience, that's fine.
I've put them on. A spindle shouldn't be heated that much anyway, so I wouldn't worry about the rubber, myself. I just stitch weld it with long breaks in between.
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Old 01-25-2013, 01:22 PM   #18
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The brake flanges would seem to be a lot further from the rubber than the axle mounting brackets and a lot of those have been welded to frames for a lot of years.
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Old 01-27-2013, 11:04 AM   #19
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I pulled this sketch off Goggle images to show where the flange welding location is relative to the rubber. I've done a fair amount of oxy-acetelyne and arc welding. I would be confident that I could arc weld the flange onto the spindle without heating up the rubber components.

If you have different experience, that's fine.
Snow finally melted and I crawled under the Vt, after looking at it I agree there is a lot of mass to absorb the heat before it gets to the rubber. so I herby refute my previous comment.

michael j.
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Old 01-27-2013, 03:30 PM   #20
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Snow finally melted and I crawled under the Vt, after looking at it I agree there is a lot of mass to absorb the heat before it gets to the rubber. so I herby refute my previous comment.

michael j.
Thanks for the follow up , Michael.
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