Use a heavier, sharp punch to re-punch the smaller mark and make a dimple. Be careful here because sometimes a punch mark will work harden the metal and will actually be harder to drill than it should be.

KeywayBroach

The second system is the BTA, this is the same as the BT system but in addition has a eccentric graduated bush. The BTA system is usful when the machine tool is without a "Y Axis". In this case the eccentric bush can make the perfect alignment between the slotting tools and the work peice.. The eccentric bush is available in three different outside diameter - 32Ø 40Ø 50Ø If you send us a drawing of your work-peice we can recommend which slotting tool suits your application. Click image below to see our Slotting Tool video !!! Download Slotting Tool Catalogue (click here) »

Use a thin, very sharp punch (stupid program will not let me type p r i c k punch but that is what it is) to lightly punch the intersection of the lines just one time. You should be able to slide the punch tip along the line and “feel” the line intersection.

Keywaycutting tool

Internal keywaycutting near me

The first is the BT system which is used on CNC machine with a "Y Axis" and Slotting machines, The holder is available with cylindrical connection either 25Ø or 32Ø. The maximum broaching depth goes from 30mm to 160mm The second system is the BTA, this is the same as the BT system but in addition has a eccentric graduated bush. The BTA system is usful when the machine tool is without a "Y Axis". In this case the eccentric bush can make the perfect alignment between the slotting tools and the work peice.. The eccentric bush is available in three different outside diameter - 32Ø 40Ø 50Ø If you send us a drawing of your work-peice we can recommend which slotting tool suits your application. Click image below to see our Slotting Tool video !!! Download Slotting Tool Catalogue (click here) »

We offer two different solutions for the internal keyway machining The first is the BT system which is used on CNC machine with a "Y Axis" and Slotting machines, The holder is available with cylindrical connection either 25Ø or 32Ø. The maximum broaching depth goes from 30mm to 160mm The second system is the BTA, this is the same as the BT system but in addition has a eccentric graduated bush. The BTA system is usful when the machine tool is without a "Y Axis". In this case the eccentric bush can make the perfect alignment between the slotting tools and the work peice.. The eccentric bush is available in three different outside diameter - 32Ø 40Ø 50Ø If you send us a drawing of your work-peice we can recommend which slotting tool suits your application. Click image below to see our Slotting Tool video !!! Download Slotting Tool Catalogue (click here) »

Internal keyway cutterfor lathe

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The BT/BTA broaching systems have been developed to machine internal keyways inside blind or through holes using CNC machine tools

Examine the punch mark in a bright light and if necessary “drift” (tilt the punch) the punch mark over (using the fine punch) to get it in exactly the right place.

Diyinternal keyway cutter

To start your hole in metal, use a sharp scriber AND SCRIBE THE INTERSECTING LINES JUST ONE TIME. This is very important because it is difficult to re-scribe the line exactly.

If you send us a drawing of your work-peice we can recommend which slotting tool suits your application. Click image below to see our Slotting Tool video !!! Download Slotting Tool Catalogue (click here) »

Bestinternal keyway cutter

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The first is the BT system which is used on CNC machine with a "Y Axis" and Slotting machines, The holder is available with cylindrical connection either 25Ø or 32Ø. The maximum broaching depth goes from 30mm to 160mm The second system is the BTA, this is the same as the BT system but in addition has a eccentric graduated bush. The BTA system is usful when the machine tool is without a "Y Axis". In this case the eccentric bush can make the perfect alignment between the slotting tools and the work peice.. The eccentric bush is available in three different outside diameter - 32Ø 40Ø 50Ø If you send us a drawing of your work-peice we can recommend which slotting tool suits your application. Click image below to see our Slotting Tool video !!! Download Slotting Tool Catalogue (click here) »

The second system is the BTA, this is the same as the BT system but in addition has a eccentric graduated bush. The BTA system is usful when the machine tool is without a "Y Axis". In this case the eccentric bush can make the perfect alignment between the slotting tools and the work peice.. The eccentric bush is available in three different outside diameter - 32Ø 40Ø 50Ø If you send us a drawing of your work-peice we can recommend which slotting tool suits your application. Click image below to see our Slotting Tool video !!! Download Slotting Tool Catalogue (click here) »

Keywaycutting machine

This was originally meant to be a part of the 140+step concrete lathe project but it is too important to risk it getting buried. It was taught to me by a guy who has been an expert mechanic for over 70 years.