TAPPING CHUCKS
Tapping chucks and tapping heads are designed to assist tapping to cut threads in a machine. The problems faced in tapping in a machine are mainly tap breakage and stripping of threads on the exit of a tap.
Taps breaking is an expensive and frustrating problem overcome by usin
g tapping heads. Generally, the tap will break if loaded up too much in a hole due to swarf not exiting or forcing into gummy materials, such as stainless steel, where swarf will put excessive pressure on the tap. Secondly, the tap when suddenly stopped and reversed out of the hole in a milling machine or drill will break due to the drawing down of the tool.
The tapping head used on a drilling machine or conventional mill or lathe ideally has a clutch mechanism, so the torque can be set depending on the tap diameter or material. Either reversible or auto-reversible tapping heads are used. Auto-reversing tapping heads can be used without having to stop the spindle to reverse direction of the tap; the spindle rotates clockwise whilst the tap is reversed out of the hole anti-clockwise. Auto-reverse tapping heads are best suited for production tapping.
Machine taps should be used in a tapping head or for machining, rather than standard hand taps. The "gun nose" tap is strongest type of tap for tapping thru. holes (pushing swarf forwards thruough the hole); where a "spiral flute" taps is suited to tap blind holes (swarf exiting back up the flutes). Also, "cold form" or "thread flow" taps can tap holes without any swarf, although material needs to be ductile.
Tapping chucks are available to suit CNC machines, usually the ER collet system is used with compression and extension at the collet end to provide play as the machine spindle slows to a stop, then rapidly reversing out. This prevents breakage of the tap, especially with tapping under M10. Some operators believe tapping can be done using only a collet chuck due to the canned tapping cycle in the machine. Sometimes this is successful, until smaller taps are broken. Then a tapping chuck can prevent a lot of downtime.
The "Bilz " tapping system is a great system for production tapping where you can dedicate a tap size to a collet that already has a fixed clutch mechanism built into the collet. This system provides a quick change selection of collets with different size taps ready to go.
Miller's Tooling has an air-operated tapping arm with this system available. It can be mounted on a bench or trolley to provide a permanent tapping station, whereby unskilled people or tradesman can tap straight 90' holes without any fear of tap breakage. This tapping arm is generally more economical than tapping large quantity holes on a CNC machine centre or mill. Different taps can be popped in or out as required quickly.
Tapping fluids such as "Rapid Tap" tapping fluid or "Tapmagic" tapping fluid or heavier concentrated coolants (aprox. 10%) should be applied to all tapping applications. Rapidtap paste is also handy, it is like a grease compound to stay on a job or tap.
Reversible Tapping Attachments:
HR SERIES - TACO patented reversible tapping attachments with robust construction have the following advantages:
- Usable on all vertical drilling machines or machines with rotating non-reversing spindles
- Right & left hand vertical or horizontal tapping
- Ultra sensitive smooth operating ball-clutch-protects against tap breakage
- Forward & reverse ball drive
- Axial float cushioned drive ensures smooth tapping, better thread profile and reduced possibility of cross threading
- Planetary gear reversing mechanism retracts at 75% of forward speeds
- Accurate depth control
HR1 - M1.4-M7 with MT1 or MT2
HR2 - M3-M12 with MT2 OR MT 3
HR3 - M8-M20 with MT3
HR4 - M14-M30 with MT4
All chucks supplied complete with arbor & collets. Additional arbors, rubber collets and die holders available.
Non-Reversing Tapping Attachments - Radial Drills:
For use on any machine with reversible spindle. Can be used vertically or horizontally.
Features:
- Radial parallel float
- Tension & compression compensation
- Ball drive
- Safety ball clutch designed for continuing bottoming of tap for RH operation
- LH available as special order
RUBBER COLLET STYLE
- M3-M12 with MT2 or MT3
- M8-M20 with MT3 or MT4
- M14-M30 with MT4 or MT5
QUICK CHANGE ADAPTOR STYLE
- M18-M42 withMT5
Non-reversing chucks M60, M120 & M200 available.
Quick Change Drill Tapper System:
For use on any machine with reversible spindle; lathes, mills, drills, manual or CNC.
System consists of:
- QC chuck with spring for vertical or horizontal use
- QC MT drill holding collets
- QC Rigid Tap chucks with rubber collets
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TAPPING CHUCKS - PIPER SAFETAP |
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LISTED BELOW IS THE DAINTREE TOOLS CATALOGUE FOR TAPPING CHUCKS
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