Does any one know how to couple a fine thread 6mm bolt to a non-metric one of approximately the same diameter?

I am trying to construct a bike powered blender and need to build a new drive shaft for it. I have plenty of threaded rod to use for the drive shaft, however it is all English and the head of the drive shaft, the piece that locks into the base of the blender and spins the blade, is threaded to fit a 6mm fine thread bolt, of which I've found a short one, but what I really really!! need to be able to do is connect the threaded metric bolt to an English threaded rod. Thanks

Question by swupuws   |  last reply


my rock tumbler borke can someone tell me were to get the part or what i can use to replace it Answered

The first one shows the driveshaft with the thingy that was on it that helped it spin the 2nd one is the thingy that helped it spin?

Question by Don,t try this at home   |  last reply


Cheap but powerful option for a go-cart motor? Answered

I'm pretty keen to build a motorized go-cart with my friend, but we both have run out of chores to do for money, too young to get a job and are on a pretty low budget. We've already got a go-cart that doesn't have a motor, but is well-built (welded frame) and has a proper steering mechanism (not just rope attached to the front axle). Two questions: Would it be easier to make an entirely new go-cart or to adapt the go cart we've got now to suit the engine we get? And What's a cheap option for a motor that has some torque and can go around 40-50km/h? I'm talking cheap like under $100NZ (around 70$US I think?) EDIT: PLEASE DON'T SAY BUY A LAWNMOWER ENGINE UNLESS YOU CAN GIVE ME A DETAILED DESCRIPTION OF HOW TO USE A LAWNMOWER ENGINE ON A GO-CART - Lawnmower engines have vertical driveshafts, and you can't just tip them sideways. A V-belt is not ideal.

Question by DELETED_isaacwilk   |  last reply


what motor should i get PLEASE HELP?

For science fair, i need to make a car for a 'king of the hill' type thing I need 2 motors (one for each back wheel) that can get me up the hill relatively quickly. The maximum power source i'm allowed is two nine volt batteries at one time (i can switch out dead ones in between runs) The hill is 40 inches in height and the ramp leading to the top of the hill is eight feet long The motors need to have a driveshaft sticking out about 1-2 inches for the wheels to fit on I'm not allowed to use remote control but i've devised a way so that the car will stop, regardless of what the motor is. I have plenty links to websites, i just dont know which one to get, if someone could point one or a few out for me that'd be great (please below $15 per motor) Help would be GREATLY appreciated I'm told by multiple friends that solarbotics.com is a GREAT resource edit: my car will weigh about 1 -1.5 pounds

Question by ishmal1103   |  last reply


What motor should I get? PLEASE HELP?

For science fair,  i need to make a car for a 'king of the hill' type thing I need 2 motors (one for each back wheel) that can get me up the hill relatively quickly. The maximum power source i'm allowed is two nine volt batteries at one time (i can switch out dead ones in between runs) The hill is 40 inches in height and the ramp leading to the top of the hill is eight feet long The motors need to have a driveshaft sticking out about 1-2 inches I'm not allowed to use remote control but i've devised a way so that the car will stop, regardless of what the motor is. A link to a website where i can buy the motors or where i could get them would suffice (please below $15 per motor) Help would be GREATLY appreciated edit: my car will weigh about 1 -1.5 pounds edit: i dont know a whole lot about which motor to get so if someone could (not to sound helpless) pick one for my situation that'd be great

Question by ishmal1103   |  last reply


Help needed on FLL robot

Hi guys, this year is my third year that I am going to be participating in the First Lego Leauge. (btw, we are using the ev3 sets) This year, my team (of 3) decided to build a car based robot. I have designed the steering mechanism and it works, and I have made a basic chassis that links everything together, and I am using 2 big servos for power(rear wheel drive), they will drive in sync, and a medium servo to control the steering, and since I had to mount the medium motor in the back, I used a driveshaft to control the steering at the front. My problems are 1)  whenever I program the medium servo to turn right, it suddenly goes out of control and goes full power to the right forever, and skips gears in the process, breaking the motor. I have tried using it outside the robot, and it works fine. 2) I am not sure if my design is a good idea, and if I should stick with tank drive. This years map need speed and precision, and the car steering lends itself to both of those, but, its unreliable, and the tank drive is not quick and not precise, but reliable. So, I need your guyses opinions, do you think I should stick with the car steering system or not? And why?

Topic by MrDubstepWarMachine   |  last reply


How to mount a wheel to a weed eater engine (direct drive) when building an r/c car?

I want to use a weed eater engine to make a fast r/c car. I have already stripped the engine down to it's basic components (removed all the plastic leaving only the bare engine) to make it easier to mount to a to the vehicle. I pulled an 8" pneumatic wheel off of a Razor electric scooter which i plan to somehow mount to the clutch system of the engine.The idea is to have a direct drive system to cut down on the complexity of a chain drive (I have the chain drive off of the electric scooter). To do this I'm thinking of bolting the wheel (which has 3 treads that previously mounted the sprocket to the wheel) directly to the bell of the clutch (the part that the clutch engages at a certain rpm and connects to the engine to the driveshaft of the weed eater). Is this a good idea or is the bell not strong enough to bolt a wheel to? For those of you who don't know what the bell is that I am referring to: http://i1.ytimg.com/vi/6FcFkbxhAXU/hqdefault.jpg Once I have the wheel mounted (it will have a single rear wheel), I will use the front end of a spare r/c car for the steering and the drive motor to pull the throttle cable on the engine. This will probably be mounted to a plywood base. Ideally, the best option would be to have servos hooked up to an Arduino controller to control the steering and throttle, but a WiFi Arduino ($80) (could I substitute it for a Raspberry Pi?) + 2 servos ($30) is outside of my price range. What do you guys think of my design? Any suggestions?

Question by epicnoobpwn   |  last reply