Bach Mercedes II Trombone Rotor Repair

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Littletweeter
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Joined: Sat Apr 13, 2019 12:58 pm

Bach Mercedes II Trombone Rotor Repair

Post by Littletweeter » Sat Apr 13, 2019 1:10 pm

I'm new to this forum and I'm having a bit of a problem with my trombone, and i cant find any information anywhere. i have a Bach Mercedes II F-Rotor trombone, and the head of the screw that keeps the linkage and the rotor together has sheered off from the threads. I've dealt with getting screws with no heads out of things before, so i know how to fix it. I just need to know where i can find a replacement screw to put it back together. If someone could help me out with giving me a link to a website where i could buy one of these screws, I'd really appreciate it.

Edit: I bought a screw and have fixed my issue. Thank you all for your help!

Edit: My image didn't upload right away, so here it is: https://ibb.co/KVLFpJy
Last edited by Littletweeter on Wed Apr 17, 2019 7:27 pm, edited 1 time in total.
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Matt K
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Re: Bach Mercedes II Trombone Rotor Repair

Post by Matt K » Sat Apr 13, 2019 1:55 pm

Usually parts like that have to be ordered by a tech who has access to the supply catalogue. Just ask one and they can get the part for you.
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DougHulme
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Re: Bach Mercedes II Trombone Rotor Repair

Post by DougHulme » Sat Apr 13, 2019 2:40 pm

Try this link, that should sort you out or just pop into any repair shop they'll give you a screw I am sure.

https://www.votawtool.com/instrument-pa ... arius.html
brassmedic
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Re: Bach Mercedes II Trombone Rotor Repair

Post by brassmedic » Sat Apr 13, 2019 5:03 pm

EBay
Littletweeter
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Re: Bach Mercedes II Trombone Rotor Repair

Post by Littletweeter » Sat Apr 13, 2019 7:09 pm

the problem with that, is that not many people sell mercedes trombones, let alone parts for them
brassmedic wrote:
Sat Apr 13, 2019 5:03 pm
EBay
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BGuttman
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Re: Bach Mercedes II Trombone Rotor Repair

Post by BGuttman » Sat Apr 13, 2019 8:42 pm

Littletweeter wrote:
Sat Apr 13, 2019 7:09 pm
the problem with that, is that not many people sell mercedes trombones, let alone parts for them
brassmedic wrote:
Sat Apr 13, 2019 5:03 pm
EBay
The screw is not terribly custom, and I'd bet a Bach 36 screw would work fine. I don't have one to analyze, but it is probably an NF thread, probably #5 size or so. Maybe one of our Techs can give a more exact value.
Bruce Guttman
Merrimack Valley Philharmonic Orchestra
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hornbuilder
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Re: Bach Mercedes II Trombone Rotor Repair

Post by hornbuilder » Sun Apr 14, 2019 5:22 pm

You're talking about the screw that holds the stop arm onto the spindle of the rotor? That screw has not changed over time, and is used on every rotor valved horn that Bach have ever made. It is not specific to a particular model.
Littletweeter
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Re: Bach Mercedes II Trombone Rotor Repair

Post by Littletweeter » Sun Apr 14, 2019 7:48 pm

hornbuilder wrote:
Sun Apr 14, 2019 5:22 pm
You're talking about the screw that holds the stop arm onto the spindle of the rotor? That screw has not changed over time, and is used on every rotor valved horn that Bach have ever made. It is not specific to a particular model.
Thank ya sir! I ordered one a few hours ago.. hopefully I get it soon
Bonearzt
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Re: Bach Mercedes II Trombone Rotor Repair

Post by Bonearzt » Sun Apr 14, 2019 7:57 pm

It's a 3-56 thread, doubt ANY local store will carry anything that small.

Amazon has these, probably more than you could ever use though:


I can ship you one for about $10

Eric
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