Making Keyways: Difference between revisions
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*We can hack this by making a 'through keyway'. Does it exist? Closest is this - [https://www.amazon.com/LicBund-Adapter-Reducer-Bushing-Predator/dp/B08FHQW2F4/ref=asc_df_B08FHQW2F4/?tag=hyprod-20&linkCode=df0&hvadid=459516538941&hvpos=&hvnetw=g&hvrand=2172810736175399121&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9023315&hvtargid=pla-980641428848&psc=1] | *We can hack this by making a 'through keyway'. Does it exist? Closest is this - [https://www.amazon.com/LicBund-Adapter-Reducer-Bushing-Predator/dp/B08FHQW2F4/ref=asc_df_B08FHQW2F4/?tag=hyprod-20&linkCode=df0&hvadid=459516538941&hvpos=&hvnetw=g&hvrand=2172810736175399121&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9023315&hvtargid=pla-980641428848&psc=1] | ||
*'''Concept of through keyway''' - create an inner keyway - from the outside! By going all the way through | *'''Concept of through keyway''' - create an inner keyway - from the outside! By going all the way through | ||
<html> <iframe src="https://docs.google.com/presentation/d/e/2PACX-1vRhtBFo78Hxa-OkzQP3cfHw99DlT5lFj7lOIOC92vHPVyzWgUuRtyIKYQ8PJOmygkRV_80jWsXWH2wG/embed?start=false&loop=false&delayms=3000" frameborder="0" width="480" height="389" allowfullscreen="true" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe> | |||
<iframe width="560" height="315" src="https://www.youtube.com/embed/KuA8Zjmq2Bk" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> </html> | |||
[https://docs.google.com/presentation/d/1jcQTZ5lyd1ZTX49zdicLnxHKxaAN4dEAnxfpACGVDPI/edit#slide=id.gb328b2d63d_0_9 edit] | |||
=Broach= | =Broach= | ||
Latest revision as of 01:41, 29 March 2021
Grinding Exterior Keyway
Use cutoff grindger wheel and guide, then use a dremel to clean up:
Brute force with grinder:
Summary of grinder route:
- Use cutoff grinder wheel with guide to make the sides. Use a guide clamped on the shaft. This provides the straight, vertical edge
- Use a larger grinder wheel to bore out between the sides.
Internal with Grinder
- Doesn't really exist.
- Use a reciprocating broach, or parting tool blade if you don't have a broach
- Or, get creative:
- We can hack this by making a 'through keyway'. Does it exist? Closest is this - [1]
- Concept of through keyway - create an inner keyway - from the outside! By going all the way through
Broach
- Arbor press and broach is the industry standard.
- Keyway broaches add cost - $40 for a single broach [2]
Parting Tool
Universal Axis
- Simply mount a needle file on a Universal Axis - based reciprocator, and let it CNC all night long to make a perfect keyway very slowly. With 10 micron step size, this should not be a problem. Working out functional parameters would be a good project for a student. Needle files: [3]
- The above is inspired by this:
Angle Drill
- Can we find a tiny angle drill?
- Harbor Freight 3/8" drill attach. If take off right angle chuck, may have a way to mount grinding disc. [4]