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Page 244(Rev. 3-07 SI)

Threaded Inserts - 11751 KEYINSERTS

These key-locking threaded inserts are ideal for thread reinforce-ment, especially when the mating stud or bolt will be removed frequently. They provide strong, permanent steel threads in any parent material — ferrous, non-ferrous, or non-metallic.Key Inserts are also well suited for quick repair of stripped, dam-aged, or worn threads. A solid version is also available to use as a handy plug to relocate holes drilled or tapped on the wrong location.Install with standard drills and taps. Important: Use tap drillspecified in table (slightly larger than standard for that thread size). Tap-drill hole tolerance should be -.02/+.10 (-.02/+.13 above 12.7 dia). 4.Screw replacementinto original holes. Parent material is totally undamaged.3.Remove insert withan E-Z OUT type tool.2. Deflect keys inwardand break off.1.Drill out lockingkeys with specified drill diameter and depth (see table). Key Inserts are often used to reinforce tapped holes in aluminiumtooling plates. ApproximateShearMinimum ultimate pull-outengagementshear strength of strengtharea of insertparent material(see table)= XLocking keys are driven down into the parent material duringinstallation, providing a positive mechanical lock against rota- tion. Inserts with an ID thread 8mm and above have four lock- ing keys, smaller sizes have two. Pull-out strength can be cal- culated approximately by the following formula:

EASY INSTALLATION EASY REMOVAL

1.Drill out old threadsusing tap drill specified in table ( Important: 5.Drive keys downwith several light hammer taps on installation tool (or directly on keys if no installation tool is available).4.Screw in insert untilbody is slightly (.25 to .75 mm) below the surface, by hand or using installation tool. Keys act as a depth stop. Correct tap drill is slightly larger than standard for that thread size).2.Countersink todiameter shown in table.3.Tap new threads,using standard tap.