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09-24-2007, 11:32 PM | #1 |
owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
| HH Cobalt Puller- Reborn page 35!
Check out www.Holmeshobbies.com for availability of these beasts. Replacement brushes available now too. I just got the final parts to the Cobalt Puller motors, and boy are these motors awesome! This is a departure from my normal style, these are good old BRUSHED motors fit to have the Holmes Hobbies name on them. They are for 2.2's, clods, and the 10T can be used in a super. The can is a bit longer than your standard motor, at around 2.5" long, so using them can provide a challenge with some link setups and clodbusters. It will bolt up inside a stock AX-10, a K2-3S(L) chassis, a stock Wheely King, and many more. It does not fit into a SW2 or SW3, GC-1, or similar narrow competition style chassis without careful tranny positioning or chassis modification. The diameter is 1.35", like a normal 540 motor. It mounts up to the standard 25mm bolt pattern, and uses 1/8" pinions like any standard motor. The best part is the LARGE 7 slot armature and large commutator. It allows a much higher commutation rate- giving better slow speed control and greater torque. There are three winds available right now, very limited quantity. 10 turn, 7 turn, and 5 turn. Any of the winds can be crawled, as the 7 slot armature and large diameter commutator gives better control than the average motor. Some details from my website about the 10T motor: Uses standard 1/8" pinions, and 25mm motor mount spacing- bolts up like a normal motor. Strong Cobalt Samarium magnets 7 slot armature, 10 turn 6.5 ounces, 2.5" long, 1.35" diamter 5-12 volts 160*F max Mamba Max highly recommended. I have been crawling and testing these motors for a while now. At the last comp I ran the 10 turn with a 3 cell lipo in my 2.2. Slow speed control was second to none, and top wheelspeed was around 6-8 mph with a 84:1 geardown with mashers. That is tlt axles with an R2 tranny with 8 tooth pinion. Power was no problem of course, I could have gotten by with 6 cells nimh. Pricing is $79.99. With increasing costs of high strength magnets and fewer manufacturers for brushed motors, this might be the cheapest that they come. 10t = 1700 rpm/volt (faster than a 35t handwound 540) 7t = 2300 rpm/volt 5t = 2800 rpm/volt Any questions? Last edited by JohnRobHolmes; 03-24-2008 at 04:51 PM. |
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09-24-2007, 11:37 PM | #2 |
MWRCA'er Join Date: Apr 2004 Location: Machesney Park IL
Posts: 3,995
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Run Time?
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09-24-2007, 11:47 PM | #3 |
I wanna be Dave Join Date: Feb 2005 Location: Burnsville
Posts: 3,096
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Could you post a picture of the puller next to a typical lathe motor? It doesn't look like it will fit in my chassis.:-(
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09-25-2007, 07:17 AM | #4 | |
Picky Fab'r/Acetal Junky Join Date: Jul 2006 Location: Arizona Desert/AJ
Posts: 3,073
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I want one of these so bad, but I don't think it will fit in my chassis. I may have to design another chassis just to run this thing Could I get an exact length measurement from the mount face to the extreme tail end? | |
09-25-2007, 08:19 AM | #5 |
owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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2.5" long, just like I said in the first post. To be exact, 63.5mm give or take a hair. Here is a comparison shot.
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09-25-2007, 08:24 AM | #6 |
Rock Crawler Join Date: Apr 2004 Location: North GA
Posts: 824
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How is the startup on these motors? Are they jumpy to start like some of the other Cobalt motors I have run, or does the 7 slot arm help smooth them out?
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09-25-2007, 08:36 AM | #7 |
owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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There is no jump to the start, it goes from zero to one RPM as you see fit. If it were unloaded it might have a bit if a jump- there is a good deal of brush contact and spring pressure to overcome. What cobalt motor are you referring to?
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09-25-2007, 08:42 AM | #8 |
Rock Crawler Join Date: Apr 2004 Location: North GA
Posts: 824
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Sweet! I am talking about that Global 380 that I have been messing with. It's like the magnets are so strong it has a hard time deciding when to stop holding and start turning. That leads me to another question: Can this motor hold a rig at a dead stop on a hill w/o any drag braking/ throttle input? |
09-25-2007, 08:46 AM | #9 | |
owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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yeah, those global 380s do start up fast- it is because they are so small and it takes a lot of throttle for them to get a vehicle moving. Quote:
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09-25-2007, 09:03 AM | #10 |
Rock Crawler Join Date: Apr 2004 Location: North GA
Posts: 824
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Good deal, might have to try one out. |
09-25-2007, 09:59 AM | #11 |
Picky Fab'r/Acetal Junky Join Date: Jul 2006 Location: Arizona Desert/AJ
Posts: 3,073
| :-P yeah, I know what'cha said in the first post..."around 2.5 inches"...I'm an anal SOB and at the same time have a very tight area to fit the motor, so I just wanted to make sure of what the exact length of around was |
09-25-2007, 10:35 AM | #12 |
I wanna be Dave Join Date: Apr 2006 Location: FLAGSTAFF
Posts: 3,728
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JRH this is a cool lookin motor and gonna have to try one out, as soon as I get some cash this week............... |
09-25-2007, 11:14 AM | #13 |
RCC Addict Join Date: Mar 2007 Location: des moines
Posts: 1,104
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hey john can i post that vid of your truck at the comp to show how smooth it is?
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09-25-2007, 05:19 PM | #14 |
Quarry Creeper Join Date: Apr 2007 Location: Katy, TX
Posts: 482
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WooHoo!!! Just ordered mine!!! Im gonna take out my crawlmaster from my ax-10 temporarily and put this in its place. It will be hooked up to my mamba max. I'll post up some video of my mamba/crawlmaster and my mamba/cobalt puller to show the difference. Thanks JRH Tyler S |
09-25-2007, 05:53 PM | #15 |
TEAM MODERATOR Join Date: May 2004 Location: Tennessee
Posts: 10,855
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I ran a 5 turn in my super at the nats. VERY strong motor. Pushed my 12 pound super around but it did get a bit warm. The 10 turn would have been better. Just seeing what these will do,I agree with John,they are GREAT little motors for a 2.2 build. I'm gonna try to put my 5 turn in my 2.2 Hustler this winter before we start the new season. Got a new tranny idea I'm working on and I think this will work out great.
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09-25-2007, 07:55 PM | #16 |
Quarry Creeper Join Date: Apr 2006 Location: MEDFORD
Posts: 440
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so do these have some good wheelspeed to them, or just gobs of torque and slow speeds?
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09-25-2007, 08:21 PM | #17 |
I wanna be Dave Join Date: Oct 2005 Location: Columbia TN
Posts: 6,154
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They got gobbs of everything. |
09-26-2007, 06:42 PM | #18 | ||
TEAM MODERATOR Join Date: May 2004 Location: Tennessee
Posts: 10,855
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Go back to the first post and read please. Agh,I'll just quote it for ya....... Quote:
I'm running a 5 turn Cobalt in my super on 8 cells at 120:1.......and it's STILL fast I run my 3025-8 at 60:1 and 10 cells and it's barely fast enough for my taste Make a bit more sence now? They might be fast but they've got enough sack to crawl as well. | ||
09-26-2007, 06:47 PM | #19 |
owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down!
Posts: 20,290
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I haven't had enough time to take any vid yet, but they have gobs of torque and wheelspeed too. I have been bogged down with orders and backorders the past few days, averaging about 10 orders a day.
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09-27-2007, 02:12 AM | #20 |
Rock Crawler Join Date: Sep 2005 Location: IDK
Posts: 852
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Jonh , can u please awnser my PM's? You know the revoler&mamba set up? i just saw that you have only one revolver in stock right now, Can u set aside that one plus a esc? Thanks John, Glad to do business with the electric goeroe |
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