Correct way to crimp a 25mm copper tube terminal with an indent crimp?

HappyHippyDad · May 23, 2016

I am about to connect up my 12V battery to my inverter (at last!) and I need to crimp some copper tube terminals on to the end of the cable. I have purchased an indent crimper for these tube terminals but I notice it is different to my crimping tool for insulated crimps. The stem of tube terminal is much longer than the width of the crimping part of the crimping tool. Does this terminal require crimping twice in different places along the stem? And if so, does it require a slightly deeper crimp at the bottom of the stem (away from the hole)?

Cheers all.

Flanders · May 23, 2016

I have not used one of those crimper,s mine have a much fatter crimping point but I would say crimp at end of the lug first were the cable enters and then give it another crimp next to it , You want the indent to go it to the bottom of the crimp as it is in your picture

Simonslimline · May 23, 2016

What type of cable are you using?

HappyHippyDad · May 23, 2016

Simonslimline said:
What type of cable are you using?

Fine stranded

Simonslimline · May 23, 2016

happyhippydad said:
Fine stranded

View attachment 32234

I would use a hex crimper.

HappyHippyDad · May 23, 2016

Simonslimline said:
I would use a hex crimper.

Yes Simon! But I don't have a hex crimper. :teeth_smile:

Simonslimline · May 23, 2016

happyhippydad said:
Yes Simon! But I don't have a hex crimper. :teeth_smile:

Did you specifically purchase the indent crimper for this job?

HappyHippyDad · May 23, 2016

Flanders said:
I have not used one of those crimper,s mine have a much fatter crimping point but I would say crimp at end of the lug first were the cable enters and then give it another crimp next to it , You want the indent to go it to the bottom of the crimp as it is in your picture

That's what I thought first Flanders and then thought it may be best to have a slightly deeper crimp at the bottom so that a slightly thicker piece of the conductor is left above the deeper crimp?

HappyHippyDad · May 23, 2016

Simonslimline said:
Did you specifically purchase the indent crimper for this job?

Yes, It was all they had, it's just for this job at home and wont be used on other jobs for customers. Any thoughts?

Simonslimline · May 23, 2016

happyhippydad said:
Yes, It was all they had, it's just for this job at home and wont be used on other jobs for customers. Any thoughts?

The point i am making HHD is that for fine stranded cable it is better to use a hex crimper.

This is what i was taught at college anyway.

Pete999 · May 23, 2016

Personally. IMHO I think indent Crimpers are the pits, the majority of my work in later life was installing UPS and Voltage stabalisers etc, using anything from 16mm to 50mm singles.
Most of the stuff we bought and use, specified Hex crimpers, in fact I did hear, can't recall where that indent crimpers were to be outlawed, as being dangerous, not sure if that's still ongoing, but you only have to look at the hex crimp as opposed to the indent crimp to see that the former is far superior.

telectrix · May 23, 2016

or solder.....

Andy78 · May 23, 2016

Agreed. An indent crimper is not suitable for fine stranded cable. I'm pretty sure you should be checking your lugs are suitable for fine stranded too.

telectrix · May 23, 2016

i'd return that indent crimper for credit and then buy a hex jobby.

Flanders · May 23, 2016

happyhippydad said:
That's what I thought first Flanders and then thought it may be best to have a slightly deeper crimp at the bottom so that a slightly thicker piece of the conductor is left above the deeper crimp?

If you use a deeper crimper setting say the 16mm for the 25mm lug you may cut into the lug I would go for the crimp twice method although saying that the Hex crimpers are better as they squeeze the lug from all directions, Other may disagree but I would give it a good pull after you have crimped it to check you have a good hold on the cable.

HappyHippyDad · May 23, 2016

Just as a thought then, would these be suitable for (non fine) stranded cable such as tails?

HappyHippyDad · May 23, 2016

Flanders said:
If you use a deeper crimper setting say the 16mm for the 25mm lug you may cut into the lug I would go for the crimp twice method although saying that the Hex crimpers are better as they squeeze the lug from all directions, Other may disagree but I would give it a good pull after you have crimped it to check you have a good hold on the cable.

Thanks Flanders, I wasn't planning on using the 16mm setting, just not biting down as hard at the top.

HappyHippyDad · May 23, 2016

telectrix said:
i'd return that indent crimper for credit and then buy a hex jobby.

I'm beginning to think I might do that!

telectrix · May 23, 2016

ere goes:

Copper Tube/Terminal Hex Crimpers 6mm² 50mm² STARTER CRIMPING BATTERY LUGS TOOL | eBay

Andy78 · May 23, 2016

happyhippydad said:
Just as a thought then, would these be suitable for (non fine) stranded cable such as tails?

They'd be more suitable for coarse stranded, but still not the best job by a long chalk.

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