Drums removed from older Cobra trailer for ASW24B. About 1985 vintage. The drums are 4 Bolt, 100mm bolt circle. The drums were removed and replaced with new, as they were scored due to brake shoes debonding. The scoring was about 0.010" deep on right,less on left. The Al-Ko company would not give information about maximum material removal, and insisted on replacement.
I was able to accurately set them up on my Clausing lathe with a new Bison chuck. Concentric and true within 0.001" total runout. Nice finish with a carbide boring bar. Scores on left were removed with a 0.005" depth of cut. On right, it required 2passes of 0.005" each.
It took a year and a half working through Wings and Wheels and Al-Ko to get the new drums. Inner diameter is 6.304"
Price for new drums was $189 each. Sell for $99 each, you pay shipping.. Pictures and Identifying numbers on request.
Hartley Falbaum
hfalbaum....at....comcast.net
Drums removed from older Cobra trailer for ASW24B. About 1985 vintage. The drums are 4 Bolt, 100mm bolt circle. The drums were removed and replaced with new, as they were scored due to brake shoes debonding. The scoring was about 0.010" deep on right,less on left. The Al-Ko company would not give information about maximum material removal, and insisted on replacement.
I was able to accurately set them up on my Clausing lathe with a new Bison chuck. Concentric and true within 0.001" total runout. Nice finish with a carbide boring bar. Scores on left were removed with a 0.005" depth of cut. On right, it required 2passes of 0.005" each.
It took a year and a half working through Wings and Wheels and Al-Ko to get the new drums. Inner diameter is 6.304"Hartley, you should have checked the local junk yards or Ebay for Opel car brake parts, that is what some trailers used. used.
Price for new drums was $189 each. Sell for $99 each, you pay shipping.. Pictures and Identifying numbers on request.
Hartley Falbaum
hfalbaum....at....comcast.net
On Wednesday, September 7, 2022 at 10:47:39 AM UTC-4, Hartley Falbaum wrote:less on left. The Al-Ko company would not give information about maximum material removal, and insisted on replacement.
Drums removed from older Cobra trailer for ASW24B. About 1985 vintage. The drums are 4 Bolt, 100mm bolt circle. The drums were removed and replaced with new, as they were scored due to brake shoes debonding. The scoring was about 0.010" deep on right,
passes of 0.005" each.I was able to accurately set them up on my Clausing lathe with a new Bison chuck. Concentric and true within 0.001" total runout. Nice finish with a carbide boring bar. Scores on left were removed with a 0.005" depth of cut. On right, it required 2
It took a year and a half working through Wings and Wheels and Al-Ko to get the new drums. Inner diameter is 6.304"Hartley, you should have checked the local junk yards or Ebay for Opel car brake parts, that is what some trailers used. used.
Price for new drums was $189 each. Sell for $99 each, you pay shipping.. Pictures and Identifying numbers on request.
Hartley Falbaum
hfalbaum....at....comcast.net
On Wednesday, September 7, 2022 at 3:26:52 PM UTC-4, youngbl...@gmail.com wrote:right, less on left. The Al-Ko company would not give information about maximum material removal, and insisted on replacement.
On Wednesday, September 7, 2022 at 10:47:39 AM UTC-4, Hartley Falbaum wrote:
Drums removed from older Cobra trailer for ASW24B. About 1985 vintage. The drums are 4 Bolt, 100mm bolt circle. The drums were removed and replaced with new, as they were scored due to brake shoes debonding. The scoring was about 0.010" deep on
passes of 0.005" each.I was able to accurately set them up on my Clausing lathe with a new Bison chuck. Concentric and true within 0.001" total runout. Nice finish with a carbide boring bar. Scores on left were removed with a 0.005" depth of cut. On right, it required 2
Hartley, I went through the same problem many years ago and I was able to find out that there was a specific OPEL wheel assembly that was used on both Komet and Cobra trailers. I will try and find out a bit more info, You may try the old model Opel GT IThanks Bob! I really appreciate your input.It took a year and a half working through Wings and Wheels and Al-Ko to get the new drums. Inner diameter is 6.304"Hartley, you should have checked the local junk yards or Ebay for Opel car brake parts, that is what some trailers used. used.
Price for new drums was $189 each. Sell for $99 each, you pay shipping.. Pictures and Identifying numbers on request.
Hartley Falbaum
hfalbaum....at....comcast.net
Do you have a specific model Opel that fits? All I have found at salvage yards and eBay are the wrong size. Several dimensions must be
met precisely for the 2 tapered roller bearings and drum size to work.
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