Instructions for installing FPS/FPD-Style Thread Instr.pdfThen resume with Step 14 of these instructions. LOCK-N-STITCH Inc. 1015 South Soderquist Road • Turlock CA 95380 • 800-736-8261

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Instructions for installing FPS/FPD-Style

Thread Repair InsertsThread Repair InsertsThread Repair InsertsThread Repair InsertsThread Repair Inserts

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Instructions for Installing FPS/FPD-Style Thread Repair Plugs

Permanent Thread Repair

NOTE: The Plug MUST be installed perpendicular to the surface – OR –The Plug MUST be installed perpendicular to the surface – OR –The Plug MUST be installed perpendicular to the surface – OR –The Plug MUST be installed perpendicular to the surface – OR –The Plug MUST be installed perpendicular to the surface – OR –

aligned to the original bolt hole. aligned to the original bolt hole. aligned to the original bolt hole. aligned to the original bolt hole. aligned to the original bolt hole. Use the FTDIP Drill Plate and DrillUse the FTDIP Drill Plate and DrillUse the FTDIP Drill Plate and DrillUse the FTDIP Drill Plate and DrillUse the FTDIP Drill Plate and Drill

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Drill PlateDrill Bushing

Center the drill chuck to the bolt hole, or you

may want to use an end mill to locate the new

hole if the old one has been moved or is badly

damaged.

Set the drill depth so that the distance from where

the side of the drill meets the cutting lip is 1/8”

longer than the plug, from the top of the shoulder

to the end of the threads. Drill the hole to depth.

2211

4

TIP:TIP:TIP:TIP:TIP:

The plug also can be installed so that it

DOESDOESDOESDOESDOES contact the bottom of the hole. In

this case, the spotfacer is NOTNOTNOTNOTNOT used and

the shoulder does NOTNOTNOTNOTNOT contact the sur-

face.

FPD (Drilled)FPS (Solid)

44NOTE:

This will assure that the tap will go deep

enough to allow the full installation of the

plug without the threads bottoming in the

hole.

In some cases, you wil simply drill all the

way through the wall of the part being

repaired.

33Or the Plug can be installed without using the Spot-

facer. Simply drill, tap and tighten the plug until

the shoulder touches the surface. Machine the head

and shoulder down flush to the surface.

Then resume with Step 14 of these instructions.





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Place the Spotfacer in the chuck and lower it

into the hole. Lubricate the pilot with the L750

Cutting Fluid.

55

99

Use the Roughing Tap to tap the hole if one

was included in your kit. Be sure to lubricate

the tap using L750 Cuttling Fluid supplied.

Make sure to leave at least ,040” (1 mm) of

the shoulder protruding above the surface.

Spotface the hole deep enough to accept

approximately 50% of the shoulder of the plug.

77

88

When using a roughing tap first, start the

finishing tap by hand to prevent cross-

threading. Be sure to tap deep enough so that

the shoulder of the plug will seat into the

spotface before the threads bottom in the hole.

66

NOTE:

There are four cutting edges on the

Spotfacer; The smaller diameter will

cut first, then the hook angle cutter

cuts second.





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Tighten the Plug into the tapped hole . . .

1212

. . . until the head twists off.

1313

Blow shavings from the tapped hole. Apply the LHC724 Sealant to the tapped hole.

11111010

Peen around the edges of the shoulder to make sure that

the plug is expanded into the counterbore so there is

no gap between the insert and surrounding material.

Machine the top of the plug down flush with

the surface.

1414 1515





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After machining, the plug is ready to be

finished to the desired shape, size or thread

profile.

1616

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Completed repair.

Lay out the location for the new hole and drill

to the desired depth . . .

. . . tap the hole to the new tap size.

19191818

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Documents

Instructions for installing FPS/FPD-Style Thread Instr.pdfThen resume with Step 14 of these instructions. LOCK-N-STITCH Inc. 1015 South Soderquist Road • Turlock CA 95380 • 800-736-8261