This product is still undergoing testing.
This is a mini caster block for the TC4 DCV conversion. It uses 2x 4x7x2.5mm Flange bearings (MF74-2RS) in each caster block.
NOTE: Due to printing tolerances, the hole for the hinge-pin must be trilled using a #3/32 drill. Do not make the hole too big, the hinge pin must be tight when inserted to avoid unnecesary slop.
This product is meant to be used with a Schumacher MI5/MI6 hub carrier and the Tech Innovations steering arm. (https://www.shapeways.com/product/ZXAWBLDJJ/mi5-tc4-steering-arm?optionId=62467392&key=9dac5461c13e7b25e7fb48211b1dd082)
While the Schumacher steering arm will work, the steering geometry does not provide an ideal ackerman and changes the steering geometry of the car. The tech innovations steering arm has been designed to retain the original steering geometry and provide aditional acerman options.
Due to 3D printing tolerances, a 0.1mm or 0.2mm spacer may be needed between the caster block bearings in order to ensure they make proper contact without causing binding on the bearing.
Parts needed as follows
Mini Caster blocks for 7mm bearings https://www.shapeways.com/product/P6A29Q62U/tc4-mini-caster-block-3-degree?key=846376a0cdf2078ed4a3f2089f26865a
Bearings (4x 4x7x2,5mm Flange bearings) http://www.fasteddybearings.com/4x7x2-5-flanged-rubber-sealed-bearing-mf74-2rs-10-units/
TC4 Steering arm https://www.shapeways.com/product/ZXAWBLDJJ/mi5-tc4-steering-arm?optionId=62467392&key=9dac5461c13e7b25e7fb48211b1dd082
Schumacher MI5 hub carrier https://www.amainhobbies.com/schumacher-front-hub-carrier-2-schu4256/p260312
Schumacher King Pin & Spacer Set https://www.amainhobbies.com/schumacher-king-pin-spacer-set-2-schu4270/p260326
2x 5x10x3mm Bearings (outside of the hub) https://www.amainhobbies.com/team-associated-5x10x3mm-tc7.1-factory-team-bearings-4-asc31734/p537147
2x 5x10x4mm Bearing (Inside of the hub) https://www.amainhobbies.com/team-associated-5x10x4mm-ball-bearing-2-asc25237/p26020
1 set TC6 DCV https://www.amainhobbies.com/team-associated-dcv-kit-asc31632/p273165
TC6 Crush Tube https://www.amainhobbies.com/team-associated-axle-crush-tube-set-4-asc31370/p220328
TC 6 New wheel Hex (not needed but recommended) https://www.amainhobbies.com/team-associated-factory-team-clamping-wheel-hex-blue-4-asc31234/p21979
4x6mm spacer set ( may be needed for placement between bearings due to printing tolerances) [u]https://www.amainhobbies.com/yokomo-4mm-spacer-shim-set-yokzc-s40/p242404[/u]
Ensure bearing make contact in the centre to avoid binding. Kingpin should be screwed in tight.