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Author Topic: Budget Time-sert kit  (Read 1059 times)

Offline doc_rot

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Budget Time-sert kit
« on: Jul 15, 2018, 22:24:23 »
If you've ever priced out a Time-sert kit you may have balked at the price; $80+  for most, with every size and pitch requiring a new kit. If you already have a tap set, this is a cheap alternative.
If you don't have a counterbore set, you will need to buy one. They can be had for as cheap as $37 on amazon and can be used for your other projects as well.

Step one, buy and measure your Time-serts. Typically the OD of the insert is 2 sizes up from the screw size, with the same pitch. For example a M10 x 1.25 bolt will use an insert with an OD of M12 x 1.25

Step two, drill the hole for the correct tap size

step three. counter bore the hole approximately 1 mm, you will want the counter bore to be as close to the diameter of the lip on the insert as possible, this will mean using a counter bore with a pilot smaller than your hole. wrap some masking tape around the pilot on the counter bore to help the bit self center in the hole, oil the outside of the tape after. You are removing very little material here so the tape should last long enough for one or two holes.

step 4 tap the hole.

step 5 file four sides of a bolt thread flat, it is the same size of the insert ID. Take just enough off to take the thread down to the minor diameter of the threads. this is your insert driver.

step 6. make sure the tapped hole is clean and dry, thread the insert into the hole.  Oil the driver and thread it into the insert all the way through the opening, thus expanding the insert and making it permanent.

Thats it, you're done! It works great, i just did several inserts this way but forgot to take pictures during the process. here is a pic of the "driver" with 4 flatted sides. and a pic of the counter bore set I used.
« Last Edit: Jul 16, 2018, 03:11:56 by doc_rot »