Time Cert vd Heli Coil, it's brought up often enough that you should watch this |
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Time Cert vd Heli Coil, it's brought up often enough that you should watch this |
76-914 |
Jul 16 2022, 07:41 PM
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#1
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,501 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California |
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Beach914 |
Jul 17 2022, 07:37 AM
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#2
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Senior Member Group: Members Posts: 964 Joined: 28-March 10 From: Aliso Viejo Member No.: 11,519 Region Association: Southern California |
I was with a major aerospace power transmission manufacturer in the 1980’s and the GE engine transmissions that we made required heli-coil inserts in the aluminum casings. No bare threads were used in the casings.
Heli-coil was the go to brand. Looks like other brands have been developed and introduced since. |
mb911 |
Jul 17 2022, 07:41 AM
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#3
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914 Guru Group: Members Posts: 6,850 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
In my oil tanks I thought about helicoils but the tang concerned me. Time serts are fine but I use a solid insert that has 2 stainless tanks on the side that you pound down with a special tool. It goes vertically down so locks it into the threads. They are hands down the best insert I have ever used. Not trying to be an advertisement but that is one of the details in my parts that others don't use as it's too expensive.
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76-914 |
Jul 17 2022, 07:53 AM
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#4
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,501 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California |
In my oil tanks I thought about helicoils but the tang concerned me. Time serts are fine but I use a solid insert that has 2 stainless tanks on the side that you pound down with a special tool. It goes vertically down so locks it into the threads. They are hands down the best insert I have ever used. Not trying to be an advertisement but that is one of the details in my parts that others don't use as it's too expensive. What brand is that Ben? I'm sure others will want to know. BTW, this discussion usually comes up during exhaust manifold bolts stripping out. In regards to that subject I could see no difference between the Time Cert vs Heli Coil other than Heli Coil doesn't rust as badly. |
mb911 |
Jul 17 2022, 08:46 AM
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#5
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914 Guru Group: Members Posts: 6,850 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
In my oil tanks I thought about helicoils but the tang concerned me. Time serts are fine but I use a solid insert that has 2 stainless tanks on the side that you pound down with a special tool. It goes vertically down so locks it into the threads. They are hands down the best insert I have ever used. Not trying to be an advertisement but that is one of the details in my parts that others don't use as it's too expensive. What brand is that Ben? I'm sure others will want to know. BTW, this discussion usually comes up during exhaust manifold bolts stripping out. In regards to that subject I could see no difference between the Time Cert vs Heli Coil other than Heli Coil doesn't rust as badly. Here is a screen shot. |
914Toy |
Jul 17 2022, 09:07 AM
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#6
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Senior Member Group: Members Posts: 718 Joined: 12-November 17 From: Laguna beach Member No.: 21,596 Region Association: Southern California |
Thanks Kent, Excellent video - valuable info.
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Superhawk996 |
Jul 17 2022, 09:23 AM
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#7
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914 Guru Group: Members Posts: 5,819 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
(IMG:style_emoticons/default/av-943.gif) even with the data right there . . . the debate goes on (not only here but also in the YouTube comments).
They are all equal (within 2 standard deviations) with respect to tensile strength - pull force (which is what matters). Each design will have some pro's and con's for other attributes like corrosion resistance, size of the insert, anti-rotation feature, etc. Properly installed, each performed it's intended function. |
jd74914 |
Jul 18 2022, 08:04 AM
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#8
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Its alive Group: Members Posts: 4,780 Joined: 16-February 04 From: CT Member No.: 1,659 Region Association: North East States |
In my oil tanks I thought about helicoils but the tang concerned me. Time serts are fine but I use a solid insert that has 2 stainless tanks on the side that you pound down with a special tool. It goes vertically down so locks it into the threads. They are hands down the best insert I have ever used. Not trying to be an advertisement but that is one of the details in my parts that others don't use as it's too expensive. What brand is that Ben? I'm sure others will want to know. BTW, this discussion usually comes up during exhaust manifold bolts stripping out. In regards to that subject I could see no difference between the Time Cert vs Heli Coil other than Heli Coil doesn't rust as badly. Here is a screen shot. (IMG:style_emoticons/default/agree.gif) That looks like a Howmet Keysert. I've always been 100x happier with them (or other solid inserts) than wire inserts. It seems like the margin of error is higher when doing the insert operation in a non-production application, though you do generally need a bit more space to fit the solid stuff so it doesn't work in really weight optimized parts like you see in aerospace. |
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