Ring Gear Machining

Ice Trike

 Dane tricked me into building something dumb

ice skate in a garbage pile at miters

bridgeporting out a skate holder

tires tuds

photo from adi

other dubious ice vehicles

Stator Assembly

 Stators shrink-fit into the housings:

Machining fixture turned into a guide fixture for the shrink-fit operation

Band heater wrapped around the housing to keep it hot while installing the stator:

Borrowed the pneumatic powered hydraulic press at work to make sure the stators didn't get stuck half way down:

3D printed 2-axis flexture kept the stators parallel to the housing but allowed them to center to the housing bore:

Lathe Spindle Motor Upgrade

Motor bracket laser cut and bent from .188" steel by SendCutSend:

Crufted NEMA-56-size Clearpath servo motor - integrated motor drive, plugs straight into single or 3-phase mains.

1:1 belt to the spindle:  

Pile of junk being replaced:

Spin-down comparison vs the original motor from 900 RPM:

More motor housing machining

 

Printed Motor Housing First Post-Machining Operation

Printed plastic expanding mandrel to hold the part from the inside:

Around .005" TIR on the as-printed surface after clamping from the ID.  Not too bad.  This all gest machined away anyways.

Checking the lock ring fit after machining the threads:

Rotor bearing and lock-ring test fit:

Sneak peek of what's coming:

 

Machining some lock rings

 

Big Kart New Beginnings

After brining it to the BD car show in 2022 and remembering what a blast it was to drive, I got interested in working on the Big Kart again.  It's getting new everything, starting with drive units based on the newer Ioniq hybrid HSG.  Real blog post when I've made more hardware progress, but for now enjoy this picture of some 3d-printed aluminum motor housings with internal water cooling channels. All the way on the left is the stock housing.

Press Tool Trick

Picked up from a technician at work who'd pressed many a bearing:  Put a magnet in the back side of the press tool so it sticks to the bottom of the arbor press ram

Tool sticks to the ram and automatically squares itself!  No need for 3 hands to hold the part, the press tool, and the arbor press lever:

Installing some new bearings in a bike wheel front hub: