Making a screwcutting tap

[Michael Cox 1Participant @michaelcox1]

Hi Ramon,

My furnace is a gas fired furnace and I definitely would not use it inside my workshop for two reasons. Firstly, the workshop is in a large wooden outbuilding with wooden floors so the fire risks are high. Secondly gas fired furnaces have the potential to produce large quantities of carbon monoxide and I am too young to die!

Mike

 

[Sub MandrelParticipant @submandrel]

Intersting footnote: I read LBSC’s advice on making piloted taps for threaded boiler stays. He said if you can’t flute the tap, just file four flats on it and take things easy!

 

Bet it works too, even on mild steel – I’ll give it a try.

 

Neil W.

[Ramon WilsonParticipant @ramonwilson3]

Hi Mike, well errr…. Quite! I think its the dog kennel then! I’m getting a bit side tracked at the moment but will try when I can to see if this furnace works (if only to see if I can get the electric meter disc to self distruct). Thanks.

 

Yes it does Neil, particularly on very small taps where fluting would prove difficult. It won’t exactly be a ‘production’ tool but it does get the job done surprisingly well. It helps too if the flats taper very slightly inwards (towards the point).

 

Ramon

 

 

 

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