Drills

Dont know if you have read this already but after skimming over the Mini EV Overvoltage topic on the US Robot Fighting League forum it confirms that Mini EVs dont like being overvolted and at 18v you would be pushing it because a hard impact at that voltage will break the brush holders on the motors unless they are well supported.

Also you might want to read up on the Mini-Walt its a Mini Ev combined with a 18v DeWalt drill transmission making a combo more faster, smoother and cooler drive with neutral timed and more torque compared to the 18v DeWalts running on 24v . The page also provides some good insight and modifications to improve the Mini Ev motor.

Chris - http://www.featherweights.org/forum

The MiniWalt - http://www.2badbots.com/miniwalt.htmhttp://www.2badbots.com/miniwalt.htm

Chris - http://www.featherweights.org/forum Im So Evil Im Worshipped By The Devil

Hi, just fount some wheels from Clas Ohlson and i think that those could be screwed straight to drill shaft like the red wheels
those retail fot 1.75‚, have 8mm center hole and 100mm diameter, here is a pic-- http://www.clasohlson.se/images/products/S/lo/B/308303_B_2004-06-30_143918.jpghttp://www.clasohlson.se/images/prod...-30_143918.jpg

and we got one 6kg in Finland using them-- http://www.robosota.fi/funktiot/naytarobokuva.php?roboid=69http://www.robosota.fi/funktiot/nayt....php?roboid=69

(if anyone is interested about this information... :))

James Cooper sells some very grippy blue wheels, and modifys them to screw straight onto drills. Many roboteers have had these made for them and not a single one has been unhappy with their performance. these wheels are used by ploughbot, venom, micro-maul, razer, warhead and many more.

well worth checking out
If your interested e-mail james at rcwars@hotmail.com

I agree competely Grant.

I bought 4, cost £3 each for the wheel and a further £3 each to take their weight down to 140g.

Very grippy and good quality.

JH-Q ...... I bought some of those wheels from Clas ohlson in Sweden when I visited their store in Insjon earlier this year. They will fit straight on to your drill motor gearboxes. They are very grippy too.

Ian

Im using the blue wheels on my new feather, 6 of them:),Might actually finish this robot lol.

Does anybody know if I can buy some longer left hand threaded bolts to fit my drill output shaft? Or am I going to need to mod the bolts I have? (cut and weld abit in:)) Thanks.

er... well... put it this way, if there was plentyful supply of left-handed bolts, I wouldnt have needed to buy over 18 drills :)

Talk to a local DeWalt distributor, they should be able to order some of the longer versions.

For those who might be interested, Currys in the UK are selling 24v Power Devils drills at £15 each.

just a little thing here ...failing to find some M5 grub screw bolts i have to come up with another idea . I was thinking would it be possible to lathe the head bit off a m5 slot head contersunk bolt ? This way i can still get the Bolt in the drill and get it out using a screwdriver

Could have posted this in the Using Gold Motors section but decided on here.

What Im wondering is: Is there much difference between the gold motors (or even the silver versions of them) and the drill motors if theyre taken out of the drill gearbox - are the golds more powerful, more efficient etc or are they quite similar?

Regards,
Jamie

Just spotted this thread! Ive just been down to my local engineering firm and they are adapting a 100mm threaded 16mm round bar (studding), putting a blind hole in one end of it, tapping this hole inside plus having an extra sleeve/collar to help support the bar onto the motor shaft. My plan is the to be able to secure wheels to it afterwards with locknuts. Im having ten made to start with at £5 each. Ill probably araldite the bars to my Argos 18v Challenge drill motors. Ill put a pic on my profile next week.
Re gold motors vs drill motors. The golds are much much more powerful! Even the 24v Silver motors I flog for £5 have more power than drill motors. We use drill motors cos they have the gearbox already and they are cheap.

http://home.ripway.com/2004-1/52908/golddrillmotor.jpghttp://home.ripway.com/2004-1/52908/golddrillmotor.jpg

24v Gold motor on the left, drill motor on the right.

Chris - http://www.featherweights.org/forum Im So Evil Im Worshipped By The Devil

Ah, i didnt realize there was such a comparison of size between the two - that puts it into perspective a bit. Thanks for the responses.

Jamie

We use the 30V NuTool drill motors which are much better and from our expereance are comparable to Gold Motors but are not as cheap as the 18V ones. They have a nice spline that the chuck fits into and removing this from the chuck and putting in in a wheel allows a very easy mounting of the wheel. The output speed of the gearbox is 1200rpm (I think).

hey mark, im really interested in those nutool drills, just wondering if you would have a picture of them and the gearbox itself?

and also where abouts can one buy them (off the net if preferable)? im started to get real sick of snapping gearbox pins :)

Glen, I dont have any pictures of the ones we use but if you are at Magna you can look at them there.

http://www.cpc.co.ukhttp://www.cpc.co.uk sell them. I Think its this one:
http://cpc.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=TL05789&N=401http://cpc.farnell.com/jsp/endecaSea...=TL05789&N=401
but no picture on thier web site. You can also get them from B&Q. Note their 36V version is alot cheaper (price these used to be) and looks the same with a bigger battery, but weve not tried them yet, you also get a 1.7Ah battery (2 with B&Q) and a 1 hour fast charger. They also have 5 gears on the last stage not 3.

Dont think Glen will be coming to Magna.

Its a bit of a trek from Austrailia!

:)

Wrong Glen :sad:.

heres one I think

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=57219&item=5961871 575&rd=1&ssPageName=WDVWhttp://cgi.ebay.co.uk/ws/eBayISAPI.d...m=5961871575&r d=1&ssPageName=WDVW

Try This http://www.nutool.co.uk/ProductCatalogue.asp?ID=J02&Section=Power%2BTools& Count=1http://www.nutool.co.uk/ProductCatal...+Tools&Count=1

Mark is it easy to get around the Hammer Action and the 2 stage gearbox?

i can get hold of some 18v nutool cordless drills for £12 a go although once postage is added i dont know how cheap they would be

Ian, The Hammer Action itself is not too bad to deal with and the easiest way I can think of is leave the Selector on the gearbox, this allows you to also use the torque setting if you wish. The other problem is most Hammer drills are 2 speed and once youve taken the drills casing apart you need to fix this selector in place. We re-made the gearbox housings taking out all but the ring/planet gears needed and placing them in an aluminum housing. The 30V gearboxes were made completly in the wheels and on the 12V ones we left all three stages in so this featherweight is really slow but it burnt a few motors out on the higher ratio so this was a safer option.

thanks for the responses, those 30v drills seem like a good equivalent to the dewalts?

btw gary are the 18v nutool drills the ones with the 2 speed gearbox?

Its the NTCD18K from http://www.nutool.co.uk/ProductCatalogue.asp?ID=J02&Section=Power%2BTools& Count=1http://www.nutool.co.uk/ProductCatal...2BTools&Count= 1

If anyone is interested I will need to know soon as I do not think the offer will last long

Found some pictures of those 30V ones.
ftp://www.bignipper.no-ip.org/Little%20Axe/DSCF0060.JPG>60
ftp://www.bignipper.no-ip.org/Little%20Axe/DSCF0061.JPG>61
ftp://www.bignipper.no-ip.org/Little%20Axe/DSCF0063.JPG>63
There is a rough size comparison of them with the compreesor motor which is the same size as the 18/12V drill motors and on 61 you can just about see the gearbox inside the wheels.

FYI these pics are very very large so unless your broadband expect very very long download times!

Not limited to space so didnt see the point in making them smaller, but just limited in the number of connections.

Not a knock on you mark just to let people know.

Not a knock on you Ian but people will know when they click open.

Mr Stu

Man am I bested!

I was just simlpy pointing out Im lasy :). Look at my profile, the pic there is just as large.

and mine :)

Im thinking of upgrading Hells Angels motors to drill motors, and changing the wheels to those grippy blue ones Ive heard so much about. How much are decent drill motors, and which ones would you suggest ? Oh, and where do the blue wheels come from, James cooper I think, but I may be wrong.

Yup, you can get them in a range of sizes from James Cooper (info@rcwars.co.uk), for a small extra fee you can get inserts pre-built into the wheels which will just screw strait onto the drill thread. Any cheap drill is usually exactly the same as the next cheap drill. The challenge range from argos (.co.uk) is one of the most used and cheapest brands.

Are spare dewalt drill motors suitable?

Dewalts are very good drill motors!

speaking of drill motors, i just found my local b and q selling 12v drills for a tenner along with jigsaws and hammer drills etc so if u want some motors or some cheap power tools its worth a look!