I need to drill a threaded, countersunk hole in a piece of material. After drilling, should I use the tap, or the countersink bit first? Does it make a difference? Does it depend on the material?
When machining a hole, what is the order of operations
techniquetools
Related Topic
- The name of the tool used to create an initial dent for drilling
- What tools to cut square post hole in composite decking board
- How to drill straight hole in 4×8 beam
- How to enlarge lock hole (small mailbox)
- What kind of drill bit is this
- Removing hose tap/faucet from old hose pipe (outside) when half the metal thread is stuck
- Walls – By manually impacting and cooling drill bit in water may one slowly drill concrete and bricks without impact function
- How to release a bit from a jammed keyless drill chuck
Best Answer
I would countersink and then tap for two reasons.
The first is the countersink bit could damage the first thread and make installing the bolt a problem.
The second is there is less metal to tap and therefore easier and less wear on the tap.
Happy Day!