Best Damaged Thread Repair? Let’s Settle This! Heli Coil, TIME-SERT, E-Z LOK, JB Weld, HHIP, Loctite

there's nothing like stripped out threads to cause a delay of a project the question is which process of repairing those stripped out threads is the best let's get the testing underway and see which process is the best in the first test we'll measure the maximum torque load for each thread repair brand then we'll see which brand offers the most holding strength for the testing we'll be using some half inch by two inch aluminum flat stock i'm going to drill and tap this half inch aluminum stock with a 17 64 drill bit and then we'll tap it for eight millimeter threads to get the tap started straight i went ahead and installed the tap in the drill press once it's started i'll remove it from the drill press and we'll continue tapping the hole aluminum is pretty soft and the use of cutting oil isn't necessary for just one hole however i'll be tapping quite a few holes so i'll go ahead and use some cutting oil okay they're both threaded in very nicely all right i'm gonna get busy and make 47 more test pieces to prepare the test pieces i'll first drill 47 holes using a 1760 force drill bit and then i'll tap the threads for each test piece all the test pieces have been drilled and tapped so let's go ahead and strip out all 48 test pieces one at a time let's see how much torque it takes to strip out the threads 347 inch pounds okay let's test this again this time 305 inch pounds so for our control an 8 millimeter bolt with a 1.25 thread pitch is stripping out at 300 to 350 inch pounds this test piece is completely stripped out so let's see how much torque it takes to rotate the bolt 360 degrees okay zero inch pounds this is completely stripped out all right all 48 test pieces are properly stripped out all the test pieces have been cleaned with brake parts cleaner obviously the experience level of viewers varies quite a bit so one question you might ask is well how does a bolt get stripped out one very common way is what i just demonstrated by over tightening a bolt another common cause is corrosion when corrosion forms just removing the bulk can cause a lot of damage to the threads crossthreading a bolt occurs when the threads of the bolt are not properly aligned with the threads on the work piece that causes a lot of damage to the threads the least expensive repair process that i've come across for stripped out threads is just using a piece of copper wire this definitely isn't a proper repair but it could work as a temporary fix the first step is to strip away the insulation from the copper wire then remove about an inch of the copper wire just place the copper wire into an area with damaged threads and begin tightening the bolt if it doesn't become snug you might have to add more copper wire copper is softer than aluminum and steel and it fills the void left behind from the damaged threads it's definitely a lot better now than it was before at a price of 6.48 what about just using loctite thread locker the red 271 it claims to be permanent heavy duty it only takes 10 minutes the loctite is made in usa lockheed is a thread locker not a thread repair product but if the bolt is going to a bracket or some type of fixture that doesn't require a lot of clamp load why not just use red thread locker to hold it in position jb well typically costs around five to six dollars but this is the pro size container and it's only 14 so why not just use jb weld for some thread repair it claims to have the world's strongest bond 5020 psi it fully cures in 15 to 24 hours steel reinforced epoxy the jb weld is made in usa squeeze equal parts from each tube onto the disposable surface and mix thoroughly apply with appropriate tool in an even coat sets in four to six hours cures in 15 to 24 hours allow four to six hours before handling and 15 hours before putting object back to use okay the jb weld is fully cured so let's go ahead and drill and tap this and then we can go ahead and install the bolts if you're using copper or loctite you don't need to know the thread pitch however for most thread repair kits you will need to know the right bolt size as well as the thread pitch you can find a thread pitch tool like this one at most auto parts or hardware stores the threads are not properly aligned with the tool so let's try a different thread pitch the tool is now fitting nicely so 1.25 is the proper thread pitch the bolt's not exactly eight millimeters but it's very close since we're using an eight millimeter tap with a 1.25 thread pitch we need to figure out what size of twist drill to use there are lots of online charts that you can access for free and we need a 1764 twist drill let's go ahead and tap new jb weld threads into the test piece the tv weld actually looks pretty good the bolt is threading into the new jb welded threads nicely at a price of only twenty dollars is this hhip thread repair kit it's designed specifically for an eight millimeter fastener with a 1.25 thread pitch the kit does not come with instructions but does come with everything needed to make a repair except for a drill twist drill bit eight millimeter tap the tool used to install the thread repair insert and the punch which is used to remove the little metal tab the kit comes with 25 repair inserts hhip is made in china the first step is to drill out the damaged threads using the twist drill that came with the hhip kit step 2 is to use the tap that came with the kit to cut the new threads for the insert step 3 is to use the insert tool to drive the thread repair kit insert into the test piece now that the insert's in place we need to use the punch in order to break off the metal tab on the insert okay the repair is finished and the bolt is fitting nicely at a price of 25 you can buy the actual name brand the gila coil brand thread repair kit stanley engineered fastening tools made in usa in china the helicoil kit includes a tap it also includes a repair insert tool and the kit also includes 10 repair inserts if you plan to use a helicoil kit you're going to need a twist drill as well as a punch the helicoil brand comes with a very nice set of instructions the first thing you have to do is drill out the damaged threads unfortunately the hilo coil brand does not come with a drill bit so you'll need the right drill bit for the repair stamped right on the gila coil tap it says use a 2160 force drill the second step is the tap the third step is to install the thread insert top the insert must be a quarter to half a turn below the top surface after you've got the thread insert installed go ahead and use the punch of the rod to break the tang at the notch at the bottom of the coil the punch of the rod has to have a square end the repair is finished and the bolt fits nicely if you don't have access to a lot of tools why not just use this loctite pc3967 strip thread repair kit now the nice thing about this kit is it can be used with just about any size fastener not just a specific size like the other brands however there are some temperature limitations from -65 to up to 300 degrees fahrenheit 350 degrees intermittent it works with most metals including aluminum iron steel brass magnesium and copper the loctite thread repair kit is made in usa strip thread release agent two-part epoxy system and it comes with a spatula clean the surface to be repaired surface should be at room temperature shake the release agent well using brush and cap top apply a thin even coating of release agent directly onto the entire surface of the bolter screw if the female component is a through-hole place tape on the end to contain the loctite pc3967 compound depress plungers and dispense equal parts of both number one and number two materials onto a clean surface mix the epoxy together until uniform in color fill the female component with the mixed repair material working time is three to five minutes before gel at 72 degrees fahrenheit thread coated fastener into compound wait five to ten minutes and remove fastener allow compound to cure for 30 minutes before use it's been read out 10 minutes so i'm going to remove the bolt and take a look at the threads the product definitely seems to have done a good job forming the threads some users have suggested that the ez lock system is actually better than the gila coil system but it is pretty expensive at 60 dollars inserts made in usa tools made in china the kit includes 10 inserts 13 30 seconds twist drill 12 millimeter tap the driver has a couple of notches to secure the insert simple one two three installation drill hole with included drill tap the hole with the included tap thread insert into place with the included driver i really like the way the easy lock thread insert is seated into the test piece the ez lock offers a very nice fit and the most expensive repair kit we'll be testing costs a hundred dollars and is made by time cert the time cert brand is made in usa the time cert comes with five inserts the time cert comes with the drill the counter balance tool tap this is the driver for the insert the first step is to drill out the old threads keeping the drill square to the surface of the hull the next step is to tap new threads with the full depth of the hull then you use the counterbore when counter boring use light down pressure with slow to medium speed counter bore the hole to the full depth permitted by the tool one really nice feature about the time cert is it has a flange on top of the insert which keeps the insert locked into place and from moving down into the hole also the time sort is self-locking oil threads of the driver tool while screwing the driver through the insert the driver will start to tighten up as it expands the bottom few threads of the insert continue until the driver tool loosens up remove driver repair is complete i really like the self-locking design of the time sort it definitely seems to be a great choice for a part that experiences frequent use such as an oil drain plug several the products require a cure time and it's been right at 36 hours so all the products should be ready for testing it takes between 300 and 350 inch pounds of torque to cause the aluminum threads to strip out so let's see how the copper thread repair holds up i'll keep tightening the bolt until the repair fails or the bolt breaks unfortunately the copper didn't work out too well zero inch pounds on the first sample the second sample actually did better at 72 inch pounds but that's still not too impressive the third copper repair didn't work out too well either at zero inch pounds let's see if the loctite red thread locker performs any better than the copper repair 138 inch pounds on the first test piece the second thread lock repair held up even better at 185 inch pounds the third test piece was down quite a bit to 97 so there was quite a bit of variance with the loctite high strength thread locker testing jb weld jb weld did fairly well on the first test piece at 148 inch pounds it actually did quite a bit better in the second test piece at 372 inch pounds it was down to 98 inch pounds on a third sample so the results of jb weld varied quite a bit testing hhip and the hhip isn't giving up like the others and the bolt finally snapped at 576 inch pounds so hhip is stronger than the control it takes between 300 and 350 inch pounds of torque to cause the aluminum threads to strip out and the bolt on the second test piece broke at 507 inch pounds and a third test piece did nearly as well as a second at 500 inch pounds so the hhip thread insert actually provided a stronger set of threads than the original aluminum threads let's test the helicoil brand next and the first bolt broke at 493 inch pounds the second bolt performed nearly the same at 483 inch pounds and a third helicoil repair test piece broke at 442 inch pounds so both the hhip and the helicoil repaired threads are a lot stronger than the original aluminum threads and the repaired threads outlasted the bolts on all of the test pieces testing the loctite epoxy strip thread repair product next and the loctite repaired thread stripped out at 139 inch pounds on the first test piece on the second test piece the threads let go at 83 inch pounds the third test piece did the best yet at 177 so the thread stripped out on all three test pieces let's test the ez lock next and the bolt really held on for a long time and finally broke at 706 inch pounds the second test piece did even better with the bolt finally breaking at 712 inch pounds the third bolt did slightly better at 717 inch pounds so very consistent results for easy lock test in the time cert and the bolt finally snapped at 571 inch pounds in the first test piece the bolt broke on the second test piece at 492 inch pounds the time sert out lasted the bolt on a third test piece with the bolt breaking at 461 inch pounds so all four thread repair kits that use metal inserts to easy lock hip time cert and helicoil proved to be stronger than the bolt jb weld original averaged 206 inch pounds before the threads let go up next let's see what the failure load is for this test piece which has aluminum threads this is a pretty simple setup with two hydraulic rams placed between two really thick pieces of steel on the other end of this hydraulic line is a hydraulic pump i'll keep adding pressure until you reach the failure load if you plan to use a thread repair kit for a cylinder head or a part that experiences heavy loads this next test will provide some great information fortunately the bolt broke and it didn't strip out at about a thousand psi let's see how close copper can come to a thousand psi unfortunately the repaired threads on a test piece began slipping at zero psi and the threads on the second test piece also let go before the pressure moved past zero and the needle barely moved past zero psi on a third test piece and the loctite red thread locker performed much better than the copper at 150 psi on the first test piece the second test piece performed nearly as well as the first one at 140 psi and the loctite gave up very close to 130 psi on the third test piece so pretty consistent results for the loctite and jb weld did better than lock tight thread locker on the first test piece at 160 psi and jb well did quite a bit better on the second test piece at 425 psi and the jb weld threads let go at 160 psi on a third test piece testing hhip and the repaired threads are refusing to let go at a thousand psi the bolt is stretching and finally let go as you can see the hip out held the bolt on a second test piece the bolt began stretching at 950 psi before it finally let loose on a third test piece the bolt began stretching at 1050 psi so the hhip thread repair outlasted the bolt three out of three times even after the bolt breaking in the test piece the thread repair still looks to be in great shape testing helicoil just like the hhip the helicoil refused to give up and the bolt began stretching at 1175 psi before it finally let go and the bolt began stretching on a second test piece at 1025 psi before the bolt snapped once again the gila coil did very well in the third test piece and the bolt finally broke at a thousand psi the helicoil thread repair still looks as good as new testing the loctite thread repair epoxy and the loctite threads gave up at 160 psi on the first test piece and it didn't do quite as well in a second test piece at only 110 psi and the third test piece only made it to 75 psi before the threads let go so about 115 psi on average for the loctite testing ez lock and the ez lock easily outlasted the bolt at a thousand psi before the bolt finally snapped and the second test piece did just as well at 1050 psi before the bolt let go and the third test piece made it to 1 100 psi before the bolt finally threw in the towel the easy lock thread repair is still in great condition testing the time cert and the time cert repair easily outlasted the bolt before making the bolt a projectile at 1100 psi on the second test piece the bolt launched in the thousand and seventy five and the third test piece finally let go at 1025 psi the time cert thread repair is still looking great so all of the metal thread insert kits performed very well outlasting the bolt three out of three times for the other options tested jb weld did the best at 248 psi on average up next let's see which brand resists corrosion the best using this highly corrosive hydrogen peroxide vinegar and salt mix it's been right out 24 hours so let's check in and see how each one of these brands performed and the gila coil seems to have held up the best without any visible signs of corrosion and the hhip seems to have come in second place but it did fairly well with just a small amount of corrosion the easy lock and the time cert have a little bit more corrosion than the other two brands and they seem to be about the same when choosing a thread insert repair kit one factor to consider is the size of the insert itself the helicoil and the hhip may stretch a little when inserted but it's around 10 millimeters the time sort has a slightly smaller diameter at 9.47 the easy lock has by far the largest diameter at almost 12 millimeters i'm really impressed with all the metal thread insert repair kits they all outperform the original aluminum threads so the question is which brand should you select for a repair there's several factors to consider corrosion resistance the size of the thread insert and the price that you're willing to spend to have the threads repaired all the videos in this channel our viewers suggested if you have a video idea i hope you'll take time to leave a comment thanks so much for watching please take care and look forward to next time

Channel: Project Farm

Views: 984,961

Keywords: project farm, Stripped thread repair, damaged thread repair, thread repair kit, damaged thread repair kit review, damaged thread repair kit comparison, best damaged thread repair kit, heli coil review, time sert review, jb weld for thread repair, e z lok repair, e z lok thread repair, Loctite thread repair, stripped thread repair, best stripped thread repair process, how to repair stripped threads, stripped thread repair comparison

Id: jknMrFOGMOQ

Length: 14min 51sec (891 seconds)

Published: Sun Jul 10 2022