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Park Tool HTS-1

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Park Tool HTS-1

Old 05-10-21, 07:59 AM
  #1  
Pogliaghi123
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Park Tool HTS-1

Hello I am trying to find a park tool hts-1. I have a few frames I need to straiten out. Theres a tool like it that was made by the guys at MSU. Id like to find the original discontinued park tool version at some point but until then I was thinking about trying to make my own. How could one make this tool for their self?
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Old 05-10-21, 12:36 PM
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I can see how the tool would push out a head-tube if the down tube has been crunched in a little by a head-on accident. I'm not exactly sure how the tool would straighten a head-tube that's twisted out of alignment with the rest of the frame, which seems to be another likely result of a less than perfect head-on collision.

Looking at the photo you provided, it doesn't actually seem that complicated to make. From what I can tell, it appears to rely on brute force and not precision to achieve it's aim. If I had a need, or maybe a desire, I could probably make this tool. But then again, I have a shop; mill, lathe, mig welder, etc. and some know-how. However, if I really had to use a tool like this, I would be asking myself, is the bike frame I'm trying to straighten really going to be worth the trouble and be safe to ride after I'm done? I expect also that it is intended for steel frames only and would not work for aluminum frames.

In a kind way, I'm also sort of thinking that if you're asking how to make it, are you going to be knowledgeable enough to use it properly?
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Old 05-10-21, 12:58 PM
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You might get more answers in the "Framebuilders" section. Ask the moderators if they can move this there.
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Old 05-10-21, 07:38 PM
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Do you know what you are getting yourself into? This is a long out of production tool but you might find an older shop or a framebuilder that has one and a mechanic that knows how to use it.
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Old 05-10-21, 08:14 PM
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Having the park tool just 20' below me in my basement and also having used a few other tools that all do the same thing I will say this is a powerful method and with great power comes great responsibility. Here are some thoughts.

- The head tube can become deformed locally if not reinforced, the headset is the usual way to add thickness. Do know that the headset cups can also distort so a replacement there might be needed.
- What spec will the bending out stop at? Do you know the OEM geometry of the bike's size (and published specs might not be size specific) And how will one measure this stopping point? Of course there will be spring back to account for.
- Any deformed localizes areas (buckles, ripples) won't be pulled out well as they will have been hardened by the initial stress/bending beyond the material's elastic point. So expect a less the smooth and likely a "wandering" tube surface.
- Additionally to this is that the tubes will bend where they are the weakest. This might not be about the headtube, I have seem straightening effects at the BB and the seat tube...
- These tools only address the in plane miss alignment. Any twist will need different methods and tooling, to both measure and straighten.
- Other types of these tools have used car jacks as the forcing device.
- I would only consider steel frames to be suitable to straighten. Thin wall, high grade, tubing will be harder to align well then lower cost high ten steel frames.
- Many times when the frame has suffered a big enough impact to bend it the fork will also be bent. Another layer of alignment and considerations opens up like Pandora's box lid.

If you were near me I would invite you to bring a worthless frame and I would give you a chance to experience this type of aligning, but with no location given in your profile... Andy
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Old 05-11-21, 08:21 AM
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Been collecting a long time. Straitened many frames. Does anyone have any tips on making the tool?
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Old 05-11-21, 08:23 AM
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Originally Posted by joeruge View Post
I can see how the tool would push out a head-tube if the down tube has been crunched in a little by a head-on accident. I'm not exactly sure how the tool would straighten a head-tube that's twisted out of alignment with the rest of the frame, which seems to be another likely result of a less than perfect head-on collision.

Looking at the photo you provided, it doesn't actually seem that complicated to make. From what I can tell, it appears to rely on brute force and not precision to achieve it's aim. If I had a need, or maybe a desire, I could probably make this tool. But then again, I have a shop; mill, lathe, mig welder, etc. and some know-how. However, if I really had to use a tool like this, I would be asking myself, is the bike frame I'm trying to straighten really going to be worth the trouble and be safe to ride after I'm done? I expect also that it is intended for steel frames only and would not work for aluminum frames.

In a kind way, I'm also sort of thinking that if you're asking how to make it, are you going to be knowledgeable enough to use it properly?
in the kindest of way, I wish I could just have my questions answered on these forums.
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Old 05-11-21, 08:29 AM
  #8  
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Can't help you to find one, but here's a thread showing it. And what it can do.

The most elusive Park Tool has surfaced. Bent headtubes, take note.

As far as making one, you could probably fabricate one using a floor jack post as a basis:

https://www.amazon.com/Vestil-FJB-36.../dp/B08GG7FRPQ

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Old 05-11-21, 08:54 AM
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Originally Posted by Pogliaghi123 View Post
Been collecting a long time. Straitened many frames. Does anyone have any tips on making the tool?
Pogliaghi- Where are you? besides my offer for you to use my tool I also have a massive threaded rod (w/o measuring I'd say a 1" diameter and about 24" long w/ 2 nuts on it already) that would make a great basis for this type of tool. It's yours for free if you can pick it up. Fabrication of the two ends should be easy for someone who can work with metal. Sorry but I can't get ant better in helping you then this offer. Andy
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Old 05-12-21, 05:04 AM
  #10  
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How could one make this tool for their self?
With the proper fabricating tools and skill set to use them, or pay someone who does.
https://www.parktool.com/assets/doc/product/HTS-1_Parts-Diagram.pdf
https://www.grofa.com/de/p/park-tool...hts-1-4001018/
https://cycleinn.co.nz/products/park-tool-hts-1-head-tube-straightener​​​​​​

To make your own look at 3 point hitch toplinks and leveling arm assemblies.
The other place I'd look is load binders. Basically you need a fairly heavy duty turnbuckle for a base to fabricate your desired ends to.\
​​​​​​https://www.agrisupply.com/top-links/c/4900018/

Last edited by dedhed; 05-12-21 at 05:16 AM.
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