The crank shaft and axle are a single unit, so the whole thing needs to be removed.
Diameter is approx. 50 mm and a spanner/wrench/screwdriver needs to be able to grip both notches and twist without being blocked by the crank arm.
Any suggestions?
Tool for Removing Round Nut with Slots – Essential Tools for Home Maintenance
screwdrivertools
Related Solutions
The next step secret to getting more of this faucet apart are the two slots cut across the cupped part. See the arrows in the following picture.
It looks to me as that the cupped part is threaded down inside the larger diameter part that sticks up from the hole in the sink. There is probably a special tool used to engage these slots to thread the part out. It may be possible to lay a piece of metal bar stock across these slots as a tool. If you do that make sure that it has nice square corners.
Die for creating sheetmetal hemispheres. There should be a set of punches with round ball ends somewhere in that mix, unless someone misused them for something else or lost them.
Doming Block and Punch Set is one term for the tool set. The die is also called a dapping block. You can find them at jewelry tool suppliers.
Related Topic
- What type of tool do I need to remove this screw
- What tool do I need to remove this screw
- What tool or special bit do I need to remove this (will add the name later when I know it :-) )
- Plumbing – What tool to tighten this nut
- What tool works with this star-shaped screw with a post in the middle
- Tighten Nut on Kitchen Faucet – Essential Tools Needed
- Tools – Identifying the Right Tool for Accessing Specific Bolts
- Removing hose tap/faucet from old hose pipe (outside) when half the metal thread is stuck
Best Answer
That would call for a pin wrench.