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diy Edit


CMTO Edit

The Concentric Maxi Torque keyless hub-to-shaft connection system. http://cmtco.com/concentric-maxi-torque ,, http://cmt.shotgunflat6.com/images/uploads/cmtspreadblue2crop.png Engineers at Custom Machine and Tool Co., Inc. found that fasteners used to connect components to high speed shafts had to have lower intertia and create fewer vibrations. We also knew that component alignment, accuracy, holding ability and runout became critical at higher speeds. When no other company could offer a compact bushing for shafts less than an inch in diameter, CMT was up to the task. We decided to design, build and patent one.

Tracked platform Edit

http://www.tradekorea.com/product/detail/P348518/rubber-track-undercarriage-with-slew-bearing.html Pivot platform uses slew bearing.

Wheels Edit

Knife edge bearings Edit

http://www.thingiverse.com/thing:343922/#files


shaft coupling Edit

https://www.youtube.com/watch?v=GDALEaHXt1g Key shaft to spline shaft coupling method. Connecting a motor to a gearbox in a precise manner with an alignment plug. Linked from CncControllers#Opensourceecology.org, http://opensourceecology.org/wiki/Power_Cube_VII

suppliers Edit

Tubing, chromed rods

https://sdp-si.com/ Gears , pulleys

http://www.servocity.com/html/worm_gearbox.html#.VCHC3hYrEZQ Worm gearbox Tamiya

http://www.servocity.com/html/pan_tilt_roll___accessories.html pan/tilt platform 20kg

“ServoBlocks”, n.d. http://www.servocity.com/html/servoblocks.html.

“Slip Ring 6x2A (6 Wires, 2 Amps) 4A Available | eBay”, n.d. http://www.ebay.co.uk/itm/Slip-Ring-6x2A-6-wires-2-amps-4A-available-/270744485832?pt=LH_DefaultDomain_0&hash=item3f09a0ffc8&clk_rvr_id=307665187420&clk_rvr_id=308031459860&clk_rvr_id=318533295051.

http://www.rapidonline.com/Electrical-Power/Toothed-timing-pulleys-and-belts-71294 “Toothed Timing Pulleys and Belts”, n.d.

http://www.rapidonline.com/electrical-power/6mm-diameter-worm-gears-length-10mm-pack-of-50-37-0305 $1.50 pack of 50 and bevel $1.7 for one.

http://www.rapidonline.com/electrical-power/steel-shafts-pack-of-50-2mm-dia-x75mm-37-0350 Steel shaft pack of 50 2mm diameter for worm gear $1.2

http://www.econobelt.com/

http://www.khkgears.co.jp/world/RCandROBO.html


http://prosafesecurity.co.za/catalog/58 Bevel gears for gates

Gear hobbing Edit

See Machine design. Links on making exact worm gear and matching worm wheel for telescope star tracking. Download zipped files on taper, pitch calculations for gear hobbing.

http://www.amazon.ca/Gears-Gear-Cutting-Ivan-Law/dp/0852429118/ref=pd_sim_b_6

Chris Heapy Edit

Claudio Grassi Edit

Myfordboy Edit


Planetary gear Edit

Mrpete222 Edit

https://www.youtube.com/watch?v=GSBEtPjAX28 grinding a tool bit.

Hour glass Edit

http://www.kinematicsmfg.com/quality/hourglass-technology/ (Scan design with laser scanner and reproduce 3d printer) Kinematics’ patented hourglass design is unique because it can withstand a survivability load that is four to nine times greater than loads carried by typical slewing drives. The special hourglass shape of the drive allows more teeth to be engaged at one time, enabling much higher torque endurance. Our technology delivers a stronger and more durable drive so your equipment can perform longer and more reliably.

plastic ball bearing Edit

http://www.youtube.com/watch?v=0sfNEHDPucs xiros Free from maintenance and lubricants, suitable for extreme environments

Xiros plastic ball bearings from igus are designed for applications where the use of grease or lubricants is prohibited. The food and drinks industry, in particular, bans the use of such substances altogether. The design of igus xiros ball bearings is the same as conventional steel bearings, consisting of an inner and outer race, a cage and a number of balls; the only difference being that the races and cage are made from igus tribological polymer materials. These plastic materials are self-lubricating and thus negate the need for lubricants. http://vimeo.com/63738557

http://www.igus.co.za/wpck/default.aspx?Pagename=ballbearing&C=IL&L=en

http://www.youtube.com/watch?v=ub-3kjljf-o 3d printing ball bearings 0

http://www.youtube.com/watch?v=GJtRKDhfnqo printing gears 1

http://www.youtube.com/watch?v=ehnzfGP6sq4 printing house


Worm gear Edit

http://www.thingiverse.com/thing:8821 Description

Ok, once you have an involute gear library AND a trapezoid thread library, you can easily make the simplest of worm drives, i.e. the non-throated kind.

Like all worm drives, the gear advances by one tooth for each revolution of the screw but with non-throated ones, there is only a single point of contact at any one time, and so torque and wear capabilities are limited.

UPDATE: As I pointed out in the comments, AFAIK a trapezoidal profile for the worm screw is all you need to match the worm gear's involute.

To make them mesh, all I did was to make sure that: 1. the pitch is the same (distance from crest to crest), 2. the pressure angle of the gear is equal to the angle of the sides of the screw profile, 3. the distance between screw and gear is equal to the gear's radial pitch plus the screw's mid-profile radius, and 4. the twist on the gear is equal to the gear's pitch radius divided by the screw's mid profile radius, with a sign depending on the screw's handedness.

Many methods have been used for control of backlash in geartrains. George W. Michalec's book Precision Gearing: Theory and Practice, published in 1966, has a good description of many different methods. Most have disadvantages such as increased size, weight, and cost. Examples are split, spring-loaded scissor gears and the use of auxiliary geartrains. from https://www.google.ch/patents/US6285339

ball screw Edit

moved to Machine design


Bearing numbering Edit

674ZZ Shielded Ball Bearings 4mm x 7mm x 2.5mm 10 Ball Bearings 674ZZ Shielded Ball Bearings, the inner diameter is 4mm, outer diameter is 7mm and the width is 2.5mm, Bearings are made of Chrome Steel.

This 608ZZ shielded 8x22x7 miniature ball bearing is a single-row bearing for supporting radial loads. (inner x outer x width)

  • MR105-ZZ, 5x10x4 mm, Radial Bearing

links Edit

https://www.robotics.org.za/bearing-flanged-f623zz-pack-of-10.html flange bearings f623zz

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