(Topic ID: 304721)

Rivet press issue

By monkfe

4 days ago


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  • 18 posts
  • 6 Pinsiders participating
  • Latest reply 3 days ago by pinballinreno
  • Topic is favorited by 4 Pinsiders

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    #1 4 days ago

    Put together a rivet press, the one harbor freight sells and modified to use the kit that pinball restore sells...since completing it and using it I find that the rivets dont roll over as nicely as they do when I use my hammer and hit it quick and hard using my vice to hold the bottom die...is there some trick I'm missing here? Picture is a sample I did to show the issue

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    #2 4 days ago

    Rivet is too long. Use 2 washers or get a shorter rivet.

    Rivets are available in 1/32" increments in length to get them to roll over correctly

    Too long and they split out.

    On a 1/8" diameter rivet you can only have less than 1/16" of rivet end protruding before pressing.

    To get the right size you have to measure the thickness of the part plus the backing washer (if used).

    Digital calipers are great for this.

    I find that 3/64" of pre-pressed rivet protrusion is better. Brass rivets split less than steel ones.

    Experience and some testing helps a lot.

    #3 4 days ago

    Something is not right. Either the rivets are the wrong size, you are using the wrong dies, or your press it out of alignment. I have the PinRestore press, and I am able to make perfect factory looking rivets with it.

    #4 4 days ago
    Quoted from gweempose:

    Something is not right. Either the rivets are the wrong size, you are using the wrong dies, or your press it out of alignment. I have the PinRestore press, and I am able to make perfect factory looking rivets with it.

    I have the pintonka, the pinrestore and the hanson hand tool, plus some spare dies to use here and there.
    In fact, if you have a spare roll-over die, you can even modify a c-clamp to use it.

    They all work great.

    Knowing the material thickness is the key to perfect rivets, then just select the right length rivet.

    #5 4 days ago

    Here is the same piece with two washers...same issue. Alignment is right on ( I'll try and get a pic)..these Are the smallest rivets in the kit...it just seems that the roll over isn't right...how fast do you do it? When I use the old hammer method, never had any issues...rolled right over...rivets dies are all from pinrestore

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    #6 4 days ago
    Quoted from pinballinreno:

    Rivet is too long. Use 2 washers or get a shorter rivet.

    Rivet is still to long….

    #7 4 days ago

    Based on the photos I think Pintopia is right. too long for the parts you are joining.

    Looks like the tubular end of the rivet is getting deformed and failing. Appears to be too much strain on the rivet.

    #8 4 days ago

    Try to grind or file the rivet down to the length that you need.

    #9 3 days ago
    Quoted from Pintopia:

    Rivet is still to long….

    Yep, way too long.

    If you can fit 2 washers with the same rivet size as before. WAY too long.

    I can see from the picture that that inside rivet tube its getting crushed and deformed. This is not correct at all.

    File down a rivet until it just barely pokes thru the part and washer like 1/32"

    See how that looks.

    Metal parts dont need a washer unless the hole is too big or the rivet fits sloppy in the hole.

    Measure the thickness.

    Guessing doesnt really work unless you are just lucky...

    #10 3 days ago

    Ok, so I added another washer, pressed it...same thing...rivet cracked...I looked at the die, the center "point" is protruding out futher than the die that works correctly...so I ground it down a bit to make them even...still no good after another test press....I then looked at the diameter of the center much larger on the one that isn't working correctly...I'm chalking this up to a defective die here....anyone see anything different....chime up

    #11 3 days ago

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    #12 3 days ago
    Quoted from monkfe:

    [quoted image][quoted image][quoted image]
    [quoted image]

    When a rivet fails I go back to the basics:

    What is the thickness of the material?
    What is the length of the rivet?

    I have used a center punch and a hammer to set rivets with good results, so the dies can be somewhat random and still work.

    I have only had them crack if the rivets are too long.

    If Im just eyeballing it, the amount of protrusion would be about the thickness of a washer before I decide to set it.

    #13 3 days ago
    Quoted from pinballinreno:

    What is the thickness of the material?
    What is the length of the rivet?
    I have used a center punch and a hammer to set rivets with good results, so the dies can be somewhat random and still work.

    2.4 mm with the smallest rivet in the box...this was the latest iteration with the ground down tip...its clearly going to wide...

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    #14 3 days ago

    ...and the alignment of the dies in the press at 90 degrees

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    #15 3 days ago
    Quoted from monkfe:

    ...and the alignment of the dies in the press at 90 degrees
    [quoted image][quoted image]

    The amount of rivet protrusion should be about the thickness of a washer before setting it, no more.

    In your picture the rivet is still too long. The roll out started, but the extra material caused it to split out, as brass wont stretch that much.

    Maybe the die isnt pointy enough to go in the center and roll out? Who knows.

    But I have had good results just using random tools around the shop.

    One day I just used a big nail to start the rollover bend and hit it with a hammer to roll it over.

    Mostly it always amounts to rivet length and material thickness when they fail.

    Too long of a rivet and they just crush and split.

    #16 3 days ago

    JodyG posted a lot of info about riveting in his ramp-o-matic thread.

    He had lots of trials and tribulations getting everything perfect.

    1/32" of extra rivet leads to bad results.

    #17 3 days ago

    Now here the same flap with three washers and the same rivet...but using the handheld rivet die that pinrestore sells...other than the split...this is how it should be...bad die for sure
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    #18 3 days ago

    In the above picture the rivet split from being slightly too long.

    My pinrestore dies look a lot pointier than yours.

    If the die isnt pointy enough it wont work right and just crush the rivet.

    Its possible you have a bad die, but I have rollover dies from a variety of sources and they are all slightly different but they work well enough.

    Pinrestore makes his own dies and they are subject to a lot of variation and dont match the other dies I have.

    My pintonka and hanson dies seem more accurate as far as shape and quality.

    However they all work well enough if the rivet is the right length.

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