M12 1.5 Thread chaser

[sdg3205]

Anyone have a good recommendation for an M12 x 1.5 thread chaser? I'm having a lot of trouble finding one locally, and I've called all the local fastener and tool stores. Lots of taps, but no chasers.

I need to clean out my head bolt block threads.

[Delorean Industries]

You need a tap not a chaser. Threads need to be cut further into block. Other wise head bolts will bind and provide false torque readings.

[Bitsyncmaster]

I just grind most of the taper end off a tap and use that to chase the threads. That lets me also tap the holes better at the bottom if it's not a through hole.

[Nicholas R]

I just grind most of the taper end off a tap and use that to chase the threads. That lets me also tap the holes better at the bottom if it's not a through hole.

Or you could just buy a bottoming tap.

[Bitsyncmaster]

Or you could just buy a bottoming tap.

Have not seen them locally. I actually don't buy the store brand taps except for chasing. The big name taps work so much better when tapping new threads.

[nullset]

You need a tap not a chaser. Threads need to be cut further into block. Other wise head bolts will bind and provide false torque readings.

Any particular brand or model of tap you'd recommend?

(I don't have a set....)

[nullset]

Would something like this be sufficient?

https://www.amazon.com/Uxcell-Flute-...ds=m12-1.5+tap

[dn010]

I buy the cheap kits and use them until they break. This current kit posted below has lasted me 5 years and it's cheap enough to replace if needed.

https://www.amazon.com/ABN-Titanium-.../dp/B01N4FTVCZ

Would something like this be sufficient?

https://www.amazon.com/Uxcell-Flute-...ds=m12-1.5+tap

[Nicholas R]

I buy the cheap kits and use them until they break. This current kit posted below has lasted me 5 years and it's cheap enough to replace if needed.

https://www.amazon.com/ABN-Titanium-.../dp/B01N4FTVCZ

For chasing, absolutely; for tapping, no way. Nothing like making a tapped part only to have a tap break off while cutting new threads. At that point there's practically nothing you can do but completely start over.

[Bitsyncmaster]

Any particular brand or model of tap you'd recommend?

(I don't have a set....)

Look on a machinist tool supply company. A good set will set you back big $$. Your probably better just buying a bunch of the common sizes you need.