A few simple checks and maintenance operations can help keep your taps running true for longer.
Inspect the Cutting Edges
First inspect the cutting edges for signs of chipping or rounding. If the leading edge of the flutes have become dull this can also cause problems. Make sure that the tap looks right before you start to tap as pushing a faulty tap can cause serious problems to both the workpiece and the tap itself.
Clean the Flutes Properly
Swarf packed into the flutes of the tap is the most common reason for poor cut threads. Clearing the flutes with a stiff bristle brush between uses will go a long way to preventing problems. Also, clearing of dried cutting oil from the flutes with a solvent soaked cloth is recommended. Never take a tap with clogged flutes to another job without first cleaning out the swarf.
Store Taps to Protect the Edges
To prevent damage to the edges of your taps when not in use, store them in individual slots, rolled up or in their case. There are many different types of tapping machines in use and for those running production quantities of taps a rack or similar store, clearly labelled, close to the tapping machine is ideal as it means that the required tap is always to hand and not left to gather dust in the general toolbox.
Check Alignment Before You Start
This tool is very precise, so to make sure that you get good results from your taps it is very important to check that they are straight before you start to use them. If a tap is to enter a hole straight then it is important to make sure that the hole is centred before you start to use the tap. This can be done by using a centre finder. Short guide bushes can also be used to check the alignment of the tap and the hole before the tap is engaged. More on Tapping Machines can be found at //www.cotswold-machinery-sales.co.uk/roscamat-tapping-machines.
Know When to Retire a Tap
Just a reminder that running a worn tool can end up being more expensive than purchasing a new one. As the safe use of hand and machine tools guidance states, worn tooling should be put out of service. This means that if threads are tearing, the tool is overheating or the edges of the tool are not able to be sharpened then the tool should be retired from use.
By following these simple checks to maintain your taps by regularly inspecting and cleaning them you will find that your tools will last longer.
