ericrw Posted February 24, 2010 Share Posted February 24, 2010 After bending yet another Pentax 480 motor shaft on my Minimag; iI would like to know if there is a suitable replacement motor on the market that has a replaceable shaft ?? Eric. Quote Link to comment Share on other sites More sharing options...
Stephen Grigg Posted February 24, 2010 Share Posted February 24, 2010 I have replaced shafts on a couple of motors I purchased from Galaxy usually have to wait a time before Ive received them.Cant remember the name of the motors sorry Eric,but they are about Quote Link to comment Share on other sites More sharing options...
ericrw Posted February 24, 2010 Author Share Posted February 24, 2010 E.mail sent to Galaxy; with hope ,Stephen. Quote Link to comment Share on other sites More sharing options...
Erfolg Posted February 24, 2010 Share Posted February 24, 2010 I do not know if the 480s can have their shafts replaced. I am aware that most if not all outrunners can have their shafts replaced by a) Replacement shaft b) Drill Rod c) Piano wire b) and c) needing to be the same as the shaft being replaced, obvious, simples, but needs qualifying Quote Link to comment Share on other sites More sharing options...
ericrw Posted February 24, 2010 Author Share Posted February 24, 2010 By the look of it, I don't think it comes apart to be able to replace the shaft. It's not very good if, when the plane trips over long grass, the shaft bends. I wish it had been the prop snapping, would certainly be cheaper !! Quote Link to comment Share on other sites More sharing options...
Stephen Grigg Posted February 24, 2010 Share Posted February 24, 2010 Mine have only bent when hitting the ground very very hard and straight in,not surprising.Galaxy are half day Wednesday Quote Link to comment Share on other sites More sharing options...
Stephen Grigg Posted February 25, 2010 Share Posted February 25, 2010 Hi Eric Spoke to Galaxy.Although more expensive the best motor in there opinion to get replacemenr shafts are E Flite,but there shafts dont usually bend.The other motor that is cheaper is there Energy Pro range,hope this helps Quote Link to comment Share on other sites More sharing options...
ericrw Posted February 25, 2010 Author Share Posted February 25, 2010 Hi Stephen, thanks for the info. Galaxy haven't replied to my e.mail yet. I was surprised by my bent shaft; believe me it practically tripped on the grass. Upto now in similar situations only the prop broke but of course now I carry a spare prop the shaft bends !! Quote Link to comment Share on other sites More sharing options...
Erfolg Posted February 25, 2010 Share Posted February 25, 2010 Eric There is one way which minimises the possibility of a bent shaft. The basic idea is to use a spinner, The clearance between the nose ring and the spinner being minimised, to say 0.005-0.020". The way I have achieved this is to mount the motor and then position the nose ring so that no gap exists. After finishing etc,I then just adjust the collet to provide the gap, normally using thick paper or thin card to set the gap. I think there must be other ways, this one works for me. It could be far easier to buy another 480, such as Jarama, I think the last I bought were only about £3-5. I would then set about the repair on the bent motor shaft. Erfolg Quote Link to comment Share on other sites More sharing options...
ericrw Posted February 25, 2010 Author Share Posted February 25, 2010 Erfolg , Following your recommendation I've had a look at the 480 Jamara (Al's Models) and I like the shaft dia at 2.3mm. It is described as an Electric motor and doesn't say whether it's an Outrunner or Inrunner; I need the latter for my Minimag. I'll check after next week as I'm off to the Canary Islands tomorrow. Thanks, Eric. Quote Link to comment Share on other sites More sharing options...
Erfolg Posted February 25, 2010 Share Posted February 25, 2010 Ahhh Eric I thought it was a brushed motor you are using. Seems I am to apologising again. If an brushless outrunner, you are using, normally the shaft is easy to remove. There is an article in this months RCM&E how to reverse the shaft. Being honest I have not yet got around to reading it in detail. But in principle changing the shaft is pretty much the same for most motors. Then again there are always some exceptions. I guess it is just a matter of buying a similar shaft, must be the same diameter though. I have seen many sites with replacement shafts, again I have never took much notice though, you don't unless you need one. I would start with GC, BRC working up towards the likes of Puffin, that is good value to high quality. I sill use the spinner idea, for most of my models though. I thought all my shafts were either harden/toughened steel or aluminium bolt on adapters. I do not think I have had any mild steel untreated type on brushless, but I guess there are exceptions. Erfolg Quote Link to comment Share on other sites More sharing options...
Erfolg Posted February 25, 2010 Share Posted February 25, 2010 Eric Is the motor a Permax 480. Or a Pentax 480, which I cannot find. If a Permax 480 I suspect it is the Multiplex BL480/5D, This is the specThe Permax BL-480/5D Brushless Motor from Multiplex. Perfect for high speed applications such as pylon racers, and flying wings like the Zagi and Micro Jet using a 5x5 prop on a 3-cell 2000mAh Li-Batt or similar Lipo battery. For aircraft that weigh between 12-30oz (340-850g). FEATURES: Three turn, stator winding (six slot) Four pole, Neodymium rotor magnets Mounts the same as 400/480 Brushed motors with up to 3 times more power than "can" type motors Three wire, Sensorless design INCLUDES: One BL-480/5D direct drive Brushless motor Three male bullet connectors Three female bullet connectors Six 3/8" (10mm) long pieces of heat-shrink tubing Two phillips head motor mounting screws REQUIRES: Soldering the connectors and installing into model aircraft Speed control for Brushless motors, and 5x 5" propeller for electric applications SPECS: Length: 1.95" (49.5mm) Diameter: 1.18" (30mm) Shaft Diameter: .13" (3.175mm) Shaft Length: .49" (12.5mm) Weight: 4.13oz (110 grams) Input Voltage: 7-10 cells Ni/Cad and 2-3 cells Lipo RPM Per Volt (kV): 2,800 Max. Current: 35A Max. RPM: 45,000 Quote Link to comment Share on other sites More sharing options... ericrw Posted February 25, 2010 Author Share Posted February 25, 2010 It's a Permax 480. My mistake !! Quote Link to comment Share on other sites More sharing options... Erfolg Posted February 25, 2010 Share Posted February 25, 2010 Corrr I have now found the description of Multiplex Minimag. This model of 40" span? uses a Brushed 400 brushed motor. Eric if this is the model. The motor type can easily be identified by having 2 wires If 2 wires a replacement motor is easily found at low cost. The Jarama I mentioned is one of many. It just happens that these were plentiful when I started modeling about 2-3 years or perhaps a little longer back. If it is a 400/480 type in my opinion, trying to change the motor shaft is not worth the trauma. Quote Link to comment Share on other sites More sharing options... ericrw Posted February 25, 2010 Author Share Posted February 25, 2010 Thanks Erfolog, I'll be going for the Jamara 480 HS BB motor when I return. Quote Link to comment Share on other sites More sharing options... Join the conversation You can post now and register later. If you have an account, sign in now to post with your account. Note: Your post will require moderator approval before it will be visible. Reply to this topic... × Pasted as rich text. Paste as plain text instead Only 75 emoji are allowed. × Your link has been automatically embedded. Display as a link instead × Your previous content has been restored. Clear editor × You cannot paste images directly. Upload or insert images from URL. Insert image from URL × Desktop Tablet Phone Submit Reply Share More sharing options... Followers 0
ericrw Posted February 25, 2010 Author Share Posted February 25, 2010 It's a Permax 480. My mistake !! Quote Link to comment Share on other sites More sharing options...
Erfolg Posted February 25, 2010 Share Posted February 25, 2010 Corrr I have now found the description of Multiplex Minimag. This model of 40" span? uses a Brushed 400 brushed motor. Eric if this is the model. The motor type can easily be identified by having 2 wires If 2 wires a replacement motor is easily found at low cost. The Jarama I mentioned is one of many. It just happens that these were plentiful when I started modeling about 2-3 years or perhaps a little longer back. If it is a 400/480 type in my opinion, trying to change the motor shaft is not worth the trauma. Quote Link to comment Share on other sites More sharing options...
ericrw Posted February 25, 2010 Author Share Posted February 25, 2010 Thanks Erfolog, I'll be going for the Jamara 480 HS BB motor when I return. Quote Link to comment Share on other sites More sharing options...
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