Helicoil Chart - Mutual Screw

1 Screw Thread Inserts, Kits& Components for IndustrialMaintenance, Repair andOverhaulBulletin 998 Thread Repair & Thread ProtectionC E R T I F I E DISO 9001 AS 9100TS 16949 ISO 140012 Emhart Teknologies, Shelton, CT Tel. (203) 924-4737 Fax (800) 732-3116 Canada (514) 351-0330 Mexico +52-55-5326-7100 Heli-Coil has the most effective anduniversally accepted method of threadrepair. Heli-Coil inserts quickly andpermanently restore stripped, worn ordamaged threads to their original sizeand inserts work in any part ormaterial aluminum, magnesium,cast iron, bronze, etc.

2 Increasing useof light weight (and soft) materialsmeans more damage to is a Heli-Coil repair for virtuallyevery threads can be restored tobetter than new condition. The Heli-Coil system makes all other thread re-pair methods such as welding, plug-ging, oversized fasteners and over-sized drilling of mating parts, s faster you save time, increaseyour repair capabilities and restoreparts that otherwise would have to steel Heli-Coil inserts pro-vide: Stronger Assemblies High Quality & Reliability Fastening Integrity Superiorto the OriginalHeli-Coil inserts eliminate.

3 Thread Wear Corrosion Galling RustHeli-Coil inserts are precision formedcoils of extremely hard stainless steel(18-8) diamond shaped wire. Wheninstalled into a Heli-Coil tapped hole,the insert pro-vides perma-nent conven-tional inserthas a driving tang for in-stallationwhich isnotched foreasy HELI-COIL Thread Repair SystemT A B L E O F C O N T E N T SRETENTION PRINCIPLEHeli-Coil inserts are larger in diameter be-fore installation than the tapped hole. Dur-ing installation the inserting tool tightensthe insert which reduces the diameter ofthe leading coil so it can enter the tappedhole.

4 After installation, each high tensilestainless steel coil expands outwardagainst the tapped hole to permanentlyanchor the threads become stripped, worn ordamaged for any reason, the strength andreliability are greatly reduced. Potentiallydangerous situations are eliminatedwhen the damaged thread is repairedwith Heli-Coil Screw thread inserts. TheHeli-Coil threaded insert provides stron-ger, more reliable threads than the origi-nal tapped hole and at the same timeeliminates the possibility of thread wear.

5 Seizing and Heli-Coil Thread Repair SystemIntroduction & Instructions2 & 3 Inch Thread Repair Kits & SetsProfessional Kits4 Master Thread Repair Kits4 & 5 Master Thread Repair Sets5 Metric Thread Repair Kits & SetsProfessional Kits6 Master Thread Repair Kits 6 & 7 Master Thread Repair Sets7 Spark Plug SeriesSpark Plug Inserts & Kits8 Sav-A-Thread Inserts & Kits8 Drill-Out Kits & Tools9 Pipe Thread Kits9 Production Inserting Tools10 Tang Break-Off & Extracting Tools11 Bulk InsertsInch12 Bulk InsertsMetric, Spark Plug, Pipe Thread13 Heli-Coil STI Taps14 Heli-Coil inserts are also available witha Screw -Locking feature: a series ofchords on one ormore of the coils ofthe insert.

6 Theypositively lockscrews andbolts from loos-ening from im-pact or Teknologies, Shelton, CT Tel. (203) 924-4737 Fax (800) 732-3116 Canada (514) 351-0330 Mexico +52-55-5326-7100 DRILLD rill out the damaged threads usingthe drill supplied in the kit. Drill to asufficient depth to accommodate theinsert length and the bolt or screwbeing the hole using the Heli-Coil tapsupplied in the kit. Check the size onthe shank of the tap to be sure it is theright the hole to sufficient depth to ac-commodate the insert length and boltor Screw being the appropriate length insertfrom the kit.

7 Use the installation toolsupplied in the kit or set. Wind the in-sert into the hole until the top coil is1/4 to 1/2 turn below the top REMOVALR emove the tang by using the tangbreak-off rod (when supplied with thekit) or a punch which fits the inside ofthe insert. Place the punch or rodsquarely on the tang and insert over 1/2 inch, 12mm, or forspark plug inserts, use long nosepliers. Holding the tang with thepliers, bend it alternately in and outuntil it comes : For Spark Plug repairs, NO drill-ing is necessary.

8 The Heli-Coil sparkplug kit contains a piloted reamer this tap, the damaged threads areremoved and new threads are cut inone continuous HELI-COIL Thread Repair SystemHELI-COIL DRILLSHeli-Coil High Speed Steel Drills aresupplied in Master Thread Repair Sets(inch and metric) and all Thread RepairKits except Spark Plug. All drills fit 1/2inch TAPSThe taps supplied with kits andsets are referred to as STI orScrew Thread Insert taps must be used forHeli-Coil STI taps supplied forstandard thread repair looklike conventional taps and maybe used with the same taphandle as conventional for Spark Plug applica-tions are known as a pilotedreamer tap.

9 These taps havea pilot thread at the front topull the tap into the hole. Thereamer section that follows removes thedamaged threads and then the STI por-tion of the tap cuts the proper threadfor the insert. No drilling is requiredwith Heli-Coil spark plug TOOLST here are two types ofHeli-Coil tools supplied inkits threaded mandreltype and prewinder prewinder tool is sup-plied in some coarse andall fine thread kits andsets. These inserts mustbe reduced in diameterbefore they are threadedinto the tapped is accomplished bywinding the insert througha set of threads called aprewinder at the front ofthe tool.

10 Generally, coarsethread inserts can be in-stalled just as they comefrom the package so a simple threadedmandrel type tool is supplied in the kitor ,Tap, s all!ToolingSTI TapSpark PlugSTI Tap4 Emhart Teknologies, Shelton, CT Tel. (203) 924-4737 Fax (800) 732-3116 Canada (514) 351-0330 Mexico + *ThreadKitInsert, E P L A C E M E N T I N S E R T STapToolDrill*Tool SizeINCH COARSES hort 1 1-1/2 2 #315/645-405401-05121185-05CN1251185-05C N1881185-05CN25005 CPB7551-05#293/326-325401-06121185-06CN1 381185-06CN2071185-06CN27606 CPB2288-06#253/328-325401-2121185-2CN164 1185-2CN2461185-2CN3282 CPB2288-211/641/810-245401-3121185-3CN19 01185-3CN2851185-3CN3803 CPB2288-313/641/812-245401-1121185-1CN21 61185-1CN3281185-1CN4321 CPB2288-115/645/321/4-205401-4121185-4CN 2501185-4CN3751185-4CN5004