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Manual Inserting Tools

 

 

   

 

  SCREWDRIVER - PLAIN MANDREL TYPE

This type of tool is the quickest and most basic type of inserting tool to use. Its use however, is limited to free running, reduced diameter, inserts. Plain mandrel screwdrivers are ideally suited to coarse pitch inserts, but with correctly adjusted collar/shoulder and careful application they can easily accommodate fine pitches.

Method of use: Place insert on mandrel with driving tang located in slot of driver. Adjust collar to rear of insert compressing free coils as sketch (non necessary for coarse pitch). Present tool with insert squarely over tapped hole. Wind insert clockwise into hole applying only very light axial pressure. Continue winding until insert is positioned approximately pitch between surface then withdraw tool.

Note: Some adjustment of collar may be required until satisfactory positioning is achieved consistently.


Screwdriver - Plain Mandrel Type


Screwdriver - Threaded Mandrel Type

SCREWDRIVER - THREADED MANDREL TYPE

Threaded mandrel screwdrivers are the simplest type of inserting tool to use. Because they have pitch control it is virtually impossible to cross thread or mis-pitch an insert using this type of tool, even with extra fine threads.

When correctly engaged, the insert cannot fall free or become dislodged from the mandrel. For this reason threaded mandrel screwdrivers are particularly effective for holes with limited or difficult access such as deep counter bores etc.

If used with a depth stop (not supplied as standard) this type of tool will consistently install inserts to a pre-set depth with far greater accuracy than plain mandrel types.

Overall installed cycle time, however, is far greater than for plain mandrel types due to the additional unwinding of the tool once insert is fitted. The use of threaded mandrel screwdriver tools, as for plain mandrel screwdrivers, is also limited to free running reduced diameter inserts.

Method of use: Wind insert on to mandrel ensuring that driving tang is fully engaged with abutment of tool. Present tool with insert squarely over tapped hole. Wind insert clockwise into hole applying only very light axial pressure. Continue winding until insert is positioned approximately pitch below surface. Unwind tool anti-clockwise until mandrel is free from installed insert.

      PLAIN MANDREL PREWIND TYPE

The plain mandrel prewind tool is the most commonly used wire insert installation tool. Suitable for both free running and screw locking types of any manufacture, it is better suited to coarse pitch inserts. However, with careful application this design will also accommodate fine pitch inserts.

On installation the tool is simply withdrawn from the fitted insert making it the quickest and most cost effective prewind tool to use.

Method of use: Withdraw mandrel clear of chamber, place inserts in chamber with insert facing towards threaded nozzle. Replace mandrel ensuring driving tang is located in slot. Push mandrel gently up to nozzle with insert engaged and wind insert into nozzle using only radial pressure. Place tool, with insert located in nozzle thread, squarely over tapped hole.

Continue winding using only radial pressure until insert is positioned approximately pitch below surface of tapped hole, then withdraw tool.

Note: Excessive axial pressure can cause inserts to jump threads when transferring from nozzle to tapped hole - fine pitch threads are particularly vulnerable.


Plain Mandrel Prewind Type

     


Threaded Mandrel Prewind Type

THREADED MANDREL PREWIND TYPE

Threaded mandrel prewind tools are suitable for both free running and screw locking inserts of any manufacture.

Because they have pitch control it is virtually impossible to cross thread or mis-pitch inserts, even extra fine pitches, using this type of tool.

However overall installed time using this type of tool is far greater than for plain mandrel types because the mandrel has to be unwound from the installed insert.

Method of use: Withdraw mandrel clear of chamber. Place insert in chamber with tang facing towards threaded nozzle. Replace mandrel up to insert and wind handle until insert becomes engaged in nozzle. Place tool squarely over tapped hole. Continue winding until insert is positioned approximately pitch below surface of tapped hole. Unwind mandrel anti-clockwise until mandrel is free from installed insert.

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