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Old 05-19-2021, 08:53 PM
wirejock's Avatar
wirejock wirejock is offline
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 4,597
Default Hydraulic Crimper

What did you use to crimp terminals on the big power and ground wires?
I know some don't care for Harbor Fright but this looks like it's the right size.
I need #6 through #2.
Larry Larson
Estes Park, CO
wirejock at yahoo dot com
Donated 01/01/2021, plus a little extra.
RV-7A #73391, N511RV reserved (2,000+ hours)
Empennage, wings, fuse, finishing kit, now FWF
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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Old 05-19-2021, 08:59 PM
jrs14855 jrs14855 is offline
Join Date: Apr 2008
Location: Lake Havasu City AZ
Posts: 2,576
Default Crimper

I used that on the #2 cables, very happy with the results.
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Old 05-19-2021, 09:20 PM
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GeoffP GeoffP is offline
Join Date: Sep 2018
Location: NSW, Australia
Posts: 211

I've got an identical looking unit sourced here in OZ. Works a treat, and comes with a big range of dies. So long as the die is the right size for the cable/lug, it's hard to go wrong.
RV-9, Empennage and Wings about done, Fuselage started.
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Old 05-19-2021, 09:26 PM
KiloWhiskey1's Avatar
KiloWhiskey1 KiloWhiskey1 is offline
Join Date: Mar 2006
Location: Kennesaw, GA
Posts: 237

I own this exact unit and it works perfectly. The crimps look good and the dies donít cut into connectors.

Originally Posted by wirejock View Post
What did you use to crimp terminals on the big power and ground wires?
I know some don't care for Harbor Fright but this looks like it's the right size.
I need #6 through #2.
Keith Ward
Current: RV-10 N253RV, RV-3 N235RV, Panther build progress
Sold: RV-7 N818PA, RV-7 N818KW, RV-8 N626JL, Christen Eagle II N56RJ
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Old 05-19-2021, 10:14 PM
spark68 spark68 is offline
Join Date: Apr 2013
Location: Lk Havasu City, AZ
Posts: 195

I have the HF unit referenced and like it. Only used it for #8 terminals so far, and some non-aviation jobs that turned out well. I find that the die numbers don't match the terminals I've used, so I pick what looks right. IE #8 die looks too small for the #8 terminal. I've used other big crimpers before in a previous life, so I have an idea what I'm looking for in a good crimp.

RV-6 under construction
dues paid 2021
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Old 05-19-2021, 10:22 PM
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jcarne jcarne is offline
Join Date: Jul 2016
Location: Worland, Wyoming
Posts: 1,906

That crimp kit won't work for the biggies, ask me how I know. The dies say they are labeled for the big wire sizes but they are waaaaaay off (too small). If you search the forums you will find others that found the same. I don't know how it works for some but not others, perhaps they used a different brand? This is what I used. It works beautifully for all of the bigger wires in the bird. Just gave it a nice smack or two with a big arse hammer.

Here is a pic of what the crimp looks like on a 2awg welding wire. These were all followed up with some adhesive shrink wrap too.
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Jereme Carne
RV-7A Flying as of 03/2021
Exempt but gladly paying!

Last edited by jcarne : 05-19-2021 at 10:26 PM.
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Old 05-19-2021, 11:34 PM
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PaulvS PaulvS is offline
Join Date: Aug 2019
Location: Western Australia
Posts: 705
Default Buying a tool?

Are there really enough heavy cables to terminate that require buying a tool, versus taking the parts to an auto electrician for crimping? Just curious, not criticizing. I'm not yet at the stage of needing to do any wiring yet so don't have any first-hand experience.
Paul vS (yes I'm also a Van)
Building RV-6A #22320 O-320 FP. Wings and tail complete, working on fuselage
Flying my Aeroprakt A-22 STOL and the aero club's RV-9A while I build
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Old 05-20-2021, 04:01 AM
bobnoffs bobnoffs is offline
Join Date: Jul 2012
Location: n. wi
Posts: 846

if you don't buy a tool you will waste a lot of time. i bet no one crimped the wire lugs and that was the end of it. i changed things and redid a lot. gas is 3 bucks, time is priceless and 2 trips to the repair shop if they are busy doubles the reason i got a tool.
Bob Noffs
n. wi.
dakota hawk/jab 3300 built and flying. sold 6/18.getting serious about the 12. in the hangar now as of 10/15/19
RV-12 kit as of 9/13
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Old 05-20-2021, 04:13 AM
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rmartingt rmartingt is offline
Join Date: Nov 2006
Location: Savannah, GA
Posts: 1,121

I have many 2 and 6 gauge wires (dual bus system) and use this for crimping those:

It's very nice being able to do it right there in place and I've already redone a couple things as I've progressed. I've also used it on my car (had a battery terminal break).
RV-7ER - canopy and wiring
There are two kinds of fool in the world. The first says "this is old, and therefore good"; the second says "this is new, and therefore better".
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Old 05-20-2021, 04:39 AM
tgmillso tgmillso is offline
Join Date: Nov 2012
Location: Launceston, Tasmania, Australia
Posts: 837

If you just want a ratcheting crimper, there is one from available from an online experimental avionics supply store (not sure if I am able to mention their name due to the whole sponsorship thing, but rhymes with "pine"). It has sizes 8AWG through 2AWG, it's less expensive that the other options discussed and doesn't come with a bunch of dies to lose as it is just a typical ratchet style. Does a great job.

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