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  #141  
Old 02-12-2013, 10:00 PM
gvfc2 gvfc2 is offline
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same as their^ questions. i would like to know the contact info for when and where to purchase
  #142  
Old 02-13-2013, 09:54 AM
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You might consider using a ball end mill to add some grooves to the outside of the cone... it would add surface area for cooling and add some decorative value too... I'm looking forward to trying one out.
  #143  
Old 02-14-2013, 12:41 PM
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Hi everyone,

Just to give a quick update, we've been working hard to really test the durability of the clutch and ensure that everything works properly with our prototypes. My brother and I are both engineers and we've been doing all sorts of testing to put the clutch through it's paces. That being said, we are very close to signing off on the final designs, and we expect our first shipment to arrive for assembly in mid-March at the earliest. We've registered our business/resell license with the state of California, and our official company name is Downs Brothers Racing. Our standard 3/4" unit will be called the DBR Type I (Pat. Pending 61/764,452). Our website is almost complete, and we will update everyone when we are live (www.downsbrosracing.com). We have made a note of people who have verbally committed on this website, and we will contact everyone individually to prioritize these orders. If anyone has more questions/concerns/feedback about the clutch, please don't hesitate to ask!

Thanks,
D
  #144  
Old 02-14-2013, 12:51 PM
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May i ask what types of testing you are doing.
Hopefully you have installed them on various sizes of karts with various motor sizes and the same for mini bikes,and then abused them beyond what the normal rider would do.
  #145  
Old 02-14-2013, 01:38 PM
ddowns46 ddowns46 is offline
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We have been trying to test it on as many different vehicles as possible, but have been limited the options available to us. The clutch has several bearings, springs, press fit sleeves, etc. made from various materials that all interface with each other at high RPM, load, and sometimes temperature. We have been intensely studying these interactions and have modified each subsequent prototype to solve any issues that have been apparent. We have a lot of experience in manufacturing and mechanical engineering, and the clutch has been designed with quality and durability in mind. We've even resorted to a complex superficial hardening process known as gas nitriding for one of the parts to allow the main needle bearing to run smoothly up to 10,000RPM at 4,000lbs load on a precision ground shaft. Given the spring pressure and friction material contact surface area, we can expect the clutch to slip around 45ft-lbs. Each model will be load rated, and we will provide maximum operating specifications such as horsepower, torque, etc. The very fact that the clutch can slip on itself provides a 'fail-safe' for applications that are outside of our listed performance specs. There is no reason to expect that our clutch will not be as durable as the high end race clutch alternatives.
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  #146  
Old 02-14-2013, 01:49 PM
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How long before you think it will be ready for the sale of them ?

I havnt kept track with the 8 pages of posts but are you doing all shaft sizes like 3/4 and 1 inch.
  #147  
Old 02-15-2013, 01:20 AM
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i love this thing! i want one for my duraforce two stroke. have you come up with a price within twenty or so of reality yet?
  #148  
Old 02-20-2013, 05:22 PM
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I built my own mini chopper, and I have a torque converter. I think it would be nice to have a manual clutch like this as the driver pulley on the torque converter setup, that way you still have the action of a torque converter and a manual clutch.
  #149  
Old 02-20-2013, 05:25 PM
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Quote:
Originally Posted by jeff091796 View Post
I built my own mini chopper, and I have a torque converter. I think it would be nice to have a manual clutch like this as the driver pulley on the torque converter setup, that way you still have the action of a torque converter and a manual clutch.
You don't want to do that. The CVT needs both components to be fully operational in order to function. Replace the driver with anything else, and it just won't work.
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  #150  
Old 03-02-2013, 06:58 PM
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Any updates on the clutch? Don't want this to get lost in the pack.
  #151  
Old 03-02-2013, 07:07 PM
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This is exactly what I need for my efi turbo kart.
  #152  
Old 03-04-2013, 05:28 PM
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Hi all,

Just wanted to chime in with a quick update. Everything has been running smoothly, and it seems like every other day we are receiving a new package of parts in the mail. We originally had intended to do a large majority of the machining overseas, but we have now made the decision to purchase a CNC lathe to bring production to the US. This will allow us to afford quicker lead times on all parts, and the ability to prototype new designs and custom clutches. We have over 30+ years in combined machining experience, and we are very excited to be even more closely linked to this process. What this means is that our initial product offering will be slightly delayed from our mid-March estimate. We are now looking at late March/early April before we start to sell these clutches. The good news is that now we have both a CNC lathe and CNC mill at our fingertips, and this opens the doors for future product ideas. Feel free to PM us on questions regarding the above information, we are happy to respond!

-M
  #153  
Old 03-04-2013, 05:31 PM
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Smashing- but... It bears asking. What will this new production methodology to to the price?
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Treat it as you would an aircraft frame and you should have no problems. -Name Withheld
The Manual- "Just the manufacturer's opinion of how to put this together."- Tim "The Tool Man" Taylor
Put down the wrench, and come out with your hands up!- Me!
Wrench, Wheel, Wreck, Repeat...
  #154  
Old 03-04-2013, 07:31 PM
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Quote:
Originally Posted by ddowns46 View Post
Hi all,

Just wanted to chime in with a quick update. Everything has been running smoothly, and it seems like every other day we are receiving a new package of parts in the mail. We originally had intended to do a large majority of the machining overseas, but we have now made the decision to purchase a CNC lathe to bring production to the US. This will allow us to afford quicker lead times on all parts, and the ability to prototype new designs and custom clutches. We have over 30+ years in combined machining experience, and we are very excited to be even more closely linked to this process. What this means is that our initial product offering will be slightly delayed from our mid-March estimate. We are now looking at late March/early April before we start to sell these clutches. The good news is that now we have both a CNC lathe and CNC mill at our fingertips, and this opens the doors for future product ideas. Feel free to PM us on questions regarding the above information, we are happy to respond!

-M
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  #155  
Old 03-04-2013, 11:24 PM
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Quote:
Originally Posted by toystory_4wd View Post
Smashing- but... It bears asking. What will this new production methodology to to the price?
If they are going to be paying off the CNC, then probably Bummer
  #156  
Old 03-05-2013, 03:44 PM
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Hi all,

This productiong change will not affect pricing. In fact, it is helping us to keep the price where we want it.

Thanks
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  #157  
Old 03-05-2013, 05:14 PM
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Quote:
Originally Posted by ddowns46 View Post
Hi all,

Just wanted to chime in with a quick update. Everything has been running smoothly, and it seems like every other day we are receiving a new package of parts in the mail. We originally had intended to do a large majority of the machining overseas, but we have now made the decision to purchase a CNC lathe to bring production to the US. This will allow us to afford quicker lead times on all parts, and the ability to prototype new designs and custom clutches. We have over 30+ years in combined machining experience, and we are very excited to be even more closely linked to this process. What this means is that our initial product offering will be slightly delayed from our mid-March estimate. We are now looking at late March/early April before we start to sell these clutches. The good news is that now we have both a CNC lathe and CNC mill at our fingertips, and this opens the doors for future product ideas. Feel free to PM us on questions regarding the above information, we are happy to respond!

-M
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  #158  
Old 03-05-2013, 05:33 PM
gvfc2 gvfc2 is offline
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i still need to save up some money for this. hope to one of the first few to have it
  #159  
Old 03-07-2013, 11:42 AM
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Awesome work! Your growing business centered around manufacturing a quality product in the US is inspiring and I hope your company becomes wildly successful.

Please put me on your list for one of the first units, I have an interesting project to use it in... I'm building a Honda XR500 with a 783cc air cooled diesel engine (17hp, 35ft-lb). I could possibly use this on a jack-shaft in between the engine and the gearbox (maybe harley). I am documenting the build on youtube and could give your clutch some exposure there.

Any-who keep up the good work and updates coming.
  #160  
Old 03-08-2013, 05:55 AM
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I want more videos and pics of this thing in action!
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