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08-31-2007, 09:20 PM
| #1 |
| Newbie Join Date: Aug 2007 Location: Wichita
Posts: 20
|  Servo's I have an extra JR Z-590M steering servo and I am debating about putting it in my Wheely King. The HPI servo says that it is 6.5kg-cm, however every servo I have seen is measured in oz/in. What is the conversion? I am assuming that teh JR servo is much better than the stock HPI servo but any info would be helpful. |
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08-31-2007, 11:14 PM
| #2 |
| Quarry Creeper Join Date: Jul 2007 Location: Racking my Brain
Posts: 429
| The JR590M has 85oz of torque and a transit time of 0.15 sec at 6.0volts. I cant find the exact specs of the SF-1 servo in the WK but since it is basically a knock off of a Futaba 3003 I would assume it has less than the 85oz of the JR, plus the JR is a metal gear servo where as the SF-1 is not. But one thing to remember is that the JR will have to use a different servo arm since the output splines on the servos are not the same. |
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09-01-2007, 12:03 AM
| #3 |
| Tech Addict   Join Date: Feb 2007 Location: BFE, NV
Posts: 1,176
| I ran a JR 590 for a while and it held up well to alot of abuse (very durable) but it isnt that strong; marginal at best.. Good luck |
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09-01-2007, 09:07 AM
| #4 |
| I'm Dracula, Bitch.   Join Date: Sep 2005 Location: Houston, TX
Posts: 12,282
| 1 kg = 35.3 oz 1 cm = 0.394 in Therefore: 6.5 kg-cm = 90.4 oz-in |
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09-01-2007, 09:59 AM
| #5 |
| Newbie Join Date: Aug 2007 Location: Wichita
Posts: 20
| So by that math the Stock HPI servo is better than the JR servo, other than the metal vs platic gearing. That sucks because the stock HPI servo is garbage! |
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09-01-2007, 05:31 PM
| #6 |
| Newbie Join Date: Aug 2007 Location: Wichita
Posts: 20
| Ok, I have come to the conclusion that I am going to buy a new steering servo. Does anyone have any suggestions? |
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09-01-2007, 06:04 PM
| #7 |
| I'm Dracula, Bitch. Join Date: Sep 2005 Location: Houston, TX
Posts: 12,282
| How much money are you willing to spend? The besty servo I have used is the HiTec 5955TG, but it is spendy. The 645MGs are pretty good as well (at turning 2.2" sized tires). |
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09-01-2007, 06:29 PM
| #8 |
| Newbie Join Date: Aug 2007 Location: Wichita
Posts: 20
| I would like to stay under $75, but if I may change that just so that I don't have to buy something else later. |
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09-01-2007, 06:33 PM
| #9 |
| Newbie Join Date: Aug 2007 Location: Wichita
Posts: 20
| What is the ideal oz./in. servo? Is there so much as to much? I am thinking the target servo may be around 150 oz./in. Am I worng? Does it need to be more? |
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09-01-2007, 06:39 PM
| #10 |
| I'm Dracula, Bitch. Join Date: Sep 2005 Location: Houston, TX
Posts: 12,282
| The wheely king should do just fine on the HiTech 645 MG and, if I remember correctly, they were only $45 each. |
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09-06-2007, 08:34 AM
| #11 |
| Rock Crawler Join Date: Apr 2007 Location: St. John's
Posts: 551
| I've been running a Towerpro MG945 in my crawler (one-time WK) for a few months now without a hitch (knock on wood). It has metal gears, 12kg/cm torque stall and can be found for less than $20.00. I just popped one in the rear as well for 4WS. Just my 2 cents worth, Sean |
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