Cast Iron Crack repair

[Music] in this segment of the video training course will teach you how to repair a craft extending from a threaded bolt hole using c2f cast master stitching pins l15 locks and an FFD full torque thread repair insert you see the crack extending away from the bolt hole across the machined surface and down on to a rough cast surface we start by using the drill bit for the c2f stitching pin when we drill our first hole just past the end of the crack drill all the way through the wall of the casting we take the elf 6500 spacing jig place the locating pin into the drilled hole and start drilling the holes for the stitching pins this is the 3-step method using the el 6500 spacing jig the jig has one locating pin and to drill holes drill the first hole and then go to the second hole and drill it through the caster we're going to continue this process by moving the spacing jig to the last hole that we drilled and continue drilling along the track you can see we're making a step up on to the machined surface right here and the spacing jig handles that quite easy just continue using the spacing jig drilling the holes up close to the bolt hole remember we're going to put a thread insert in that bolt hole and it's going to actually get drilled bigger so we need to lose a little bit of space between the last pin and the bolt hole so we don't cut most of that last stitching pin out now we're going to use the spot face or for countersinking the top of the hole so we're gonna set the depth of the spot face er and compare it to a the shoulder of a stitching pin we want to put the shoulder about 50% below the surface in this repair we have plenty of wall thickness so we want to use a lot of the shoulder down into the the casting this increases the strength of the repair put the spot face er into the drill tighten the check and now we're going to spot face each of these holes just run it down till the edge of the stop touches the surface and continue along through all the holes the depth of the spot face is critical if you don't have a deep enough the stitching pins won't have any strength if you go too deep in thin wall sections you would run out of threads or not have enough wall thickness left for threads okay now we have all of the holes spot face and we're going to put the tap into the tapping gun using this tapping fluid tap each of these holes the pneumatic power tapper really speeds up this process and makes it go quick [Music] we're tapping all the way through so you want to make sure the tap goes down deep enough to where you can feel it start to get easy as it comes out the other side [Music] you want to make sure that you're tapping angle is the same as your drill angle so it's helpful to use a loose drill bit to assure that you're following that same angle these taps will follow the hole on their own but you've got to start fairly close to that angle if you want to end up with a good threaded hole and to prevent breaking taps so pay attention to the angle of your of your tap going to use the 7 to LHD 724 thread sealant in the holes and go along here and do every other one that way we can install a series of the of the pins let me go ahead and put the first one and just make sure everything goes exactly the way we want run it down break it off looks good so now we're going to install the other pins starting them with a nut runner it's much easier this way and just run the pins down till they break off and we'll do the remaining pins putting the ceiling in the holes you notice that in the two pins on the left where it's in the rough caster we're using a shorter pin than we are up on the machine surface where the casting is a little thicker that's why we make so many different lengths of pins so that you can choose the appropriate length of pin to match the thickness of the casting now we just grind everything down real close to be very careful not to grind into that machine surface because that's all valuable material and we don't want to have any low spots though find the pins down close so we can tell where they're at now we start our second series of holes by drilling one hole down between the first and second pins again drill all the way through now we use the spacing jig and we're going to skip to the second hole making sure we don't drill on two sides of a previously installed pin [Music] now we're going to make the jump up to the Machine surface again very simple with the spacing jig in and drill the hole a certain actually move the stop up higher to allow us to cut because the edge of the spot face is going to hit on the high side of that little radius double checker our depth stop with the shoulder of the pen to make sure we're not gonna go too deep and we have a spot face down in that corner and then we'd have to change the depth of the spot face for the remaining two holes and bring it back to the same depth as it was before tap these holes [Music] put the sealant in them we've sped up the tapping processes and some of these processes but realize we are tapping them all the way down it just looks like we're just barely going in and out but we are actually tapping them all the way through just like always but that stitching pin in see how it fit into the corner they're flying them down being very careful of the machined surface on the rough cast side we can actually blend them and on this machined surface we're actually just leaving them up just a few thousands now we're going to take a ball-peen hammer and just kind of go around the edges of the pins pinning them down making a nice metal-to-metal fit there so we get a good

Channel: LOCK-N-STITCH INC.

Views: 2,028,208

Rating: 4.448348 out of 5

Keywords: Crack repair, metal stitching, LOCK-N-STITCH, casting repair, cracked cast iron, welding cast iron, cast iron welding, cast iron crack repair, metal locking, metalock, metallock

Id: Pq0wfU4ZaKk

Length: 9min 2sec (542 seconds)

Published: Wed Dec 30 2009

Reddit Comments

[u/dougb]

That ended too soon.

[u/SigmundFrog]

Had no clue they did it this way.

[u/MWDTech]

Would seem easier to grind out the crack and just weld a bead in place.

[u/ReallyBigDeal]

This was really awesome! I can’t believe I watched all 3 videos.

[u/Kbrooks_va]

Pneumatic power tapper

[u/MWDTech]

Oh I agree, if this piece is subject to thermal stresses I can't see those drilled studs doing much more than plugging a leak