Hydraulic Cable Crimpers
A hydraulic crimping tool is what you reach for when lugs must go on right, first time, with no loose strands or hot joints later.
On big tails and heavy cable, hand crimps are a false economy. Hydraulic crimpers give you consistent pressure for clean, repeatable terminations on copper and aluminium lugs, so boards, isolators, and plant feeds go in solid. Pick the right tonnage and die range, then crack on.
What Are Hydraulic Crimping Tools Used For?
- Crimping copper and aluminium cable lugs for mains tails, submains, and distribution boards where a proper, tight termination stops heat build-up and call-backs.
- Terminating SWA and flexible power cables for isolators, motors, and plant feeds on commercial and industrial jobs where you need repeatable pressure across every crimp.
- Making off large conductors in tight risers and cupboards because a hydraulic crimping tool does the graft without you fighting a long-handled manual crimper all day.
- Producing consistent, audit-friendly crimps on maintenance work so every lug looks the same and you are not guessing whether the last squeeze was enough.
Choosing the Right Hydraulic Crimping Tool
Sort the right one by matching the tool tonnage and die range to the biggest cable you actually crimp, not the one-off job you might do once a year.
1. Manual vs Battery
If you are doing a handful of lugs on a shutdown or occasional board change, a manual hydraulic crimping tool is fine and it is hard to kill. If you are terminating all day or working overhead and in cupboards, go battery so you are not pumping every crimp and ending the day with a dead arm.
2. Tonnage and head size
If you are on smaller lugs, do not lug a massive head around for no reason because it will not fit where you need it. If you are on big conductors and thick-wall lugs, you need the higher tonnage tool so you are not under-crimping and hoping for the best.
3. Die type and compatibility
Check the die profile and range before you buy, because not every set covers the same sizes and some tools use brand-specific dies. If you already have dies on the van, make sure the new head matches them so you are not rebuying the lot.
4. Jobsite practicality
If you are in awkward positions, look for a head that rotates and a quick-release setup so you are not wrestling the cable into place. If you are working in dirty environments, keep it wiped down and stored properly because grit on the ram and seals is what shortens tool life.
Who Are Hydraulic Crimping Tools For on Site?
- Industrial and commercial sparkies crimping lugs onto larger conductors for boards, isolators, and plant rooms where a weak crimp is a straight failure point.
- Panel builders and maintenance electricians who need consistent results across repeated terminations, especially when you are doing dozens in a shift.
- EV and solar installers working with heavier gauge DC and AC cabling where the right die and pressure makes the difference between a tidy job and a warm joint later.
The Basics: Understanding Hydraulic Crimping Tools
A hydraulic crimping tool uses hydraulic pressure to compress a lug onto a conductor with consistent force, so you get a repeatable termination instead of a "that will do" squeeze.
1. The die does the shape and the tool does the force
The die size and profile controls how the lug is formed, and the hydraulics provide the pressure to finish the crimp properly. Get the die wrong and the crimp looks off even if you have plenty of force.
2. Bigger cable means more than just a bigger die
As cable and lug size goes up, you need enough tonnage to fully compress the barrel without half-crimps. That is why the right tool rating matters as much as the die markings.
3. Consistency is the whole point
On repeated terminations, hydraulics give you the same result each time, which helps avoid loose connections that heat-cycle, discolour, and fail when the load goes on.
Hydraulic Crimping Tool Accessories That Keep You Moving
The right add-ons stop you getting stuck mid-job with the wrong die or a tool that is due a bleed and will not finish the crimp cleanly.
1. Crimping die sets
A proper die set means you can match the lug and conductor size instead of forcing "near enough" and ending up with a loose barrel. Keep the common sizes in the case so you are not running back to the van for one missing die.
2. Spare seals and hydraulic oil
Seals and oil are what keep the pressure where it should be, and a weeping ram is a job-stopper when you are halfway through terminations. Having the right service bits available saves downtime and avoids wrecking the tool by running it dry.
3. Carry case and organiser
A solid case keeps dies together and stops the head getting knocked about in the back of the van. It also makes it obvious when a die has gone missing before you get to site.
Shop Hydraulic Crimping Tools at ITS
Whether you need a compact hydraulic crimping tool for occasional terminations or a higher tonnage option for bigger lugs, we stock the full range of crimpers and dies to suit real site work. It is all held in our own warehouse, in stock and ready for next day delivery.
Hydraulic Crimping Tool FAQs
Manual vs. Battery hydraulic crimpers: which is better?
Manual is the sensible pick if you only crimp now and then, because it is simple, reliable, and you are not managing batteries on a shutdown. Battery is the one for repeated terminations, awkward positions, and day-in-day-out work, because it gives the same crimp without you pumping every cycle and losing time and energy.
What die size do I need for 50mm cable?
Match the die to the lug size you are crimping, not just the cable you think it is, because lugs are marked by cross-sectional area and can vary by manufacturer. For 50mm cable you are typically looking for a die marked 50mm squared, but always check the lug stamp and the crimper die chart so you are not under or over-compressing the barrel.
How often should hydraulic tools be serviced?
Service intervals depend on how hard it is used, but as a rule you should inspect it regularly and get it serviced if you see oil weeping, the ram feels rough, or it is not completing crimps cleanly. On tools that are used daily, plan periodic servicing and calibration checks to keep pressure consistent, because worn seals and low oil are what cause weak crimps.
Will one hydraulic crimping tool cover every lug size I use?
No, not realistically. Tools have a maximum crimp range and a rated tonnage, and once you go beyond either you are into poor crimps or a tool that physically will not close. Buy for your biggest regular cable size, then make sure you have the right dies for the smaller stuff rather than trying to make one undersized tool do everything.
What are the tell-tales of a bad crimp on site?
If the lug barrel is visibly uneven, the conductor can move in the barrel, or the crimp marks do not match the die profile, treat it as a redo. A bad crimp is the sort of fault that shows up later as heat, discolouring, or nuisance trips under load, so it is worth cutting it off and doing it properly while the boards are still open.
