Cable Jointing Tools
Alroc Cable Jointing Tools Explained
July 22nd, 2026
Alroc cable jointing tools are specialist cable preparation tools used by cable jointers to strip, cut, remove, chamfer and prepare LV, MV, HV and EHV power cables before installing cable joints, terminations and connectors.
In medium and high voltage cable systems, preparation accuracy is critical. Before an 11kV, 33kV, 66kV or 132kV cable can be jointed or terminated, the cable layers must be removed to the correct dimensions without damaging the insulation, conductor, semi-conductive screen, metallic screen or outer sheath.
Alroc tools are used for tasks such as outer sheath removal, bonded semi-con screen removal, peelable semi-con screen removal, XLPE insulation stripping, cable chamfering, grooving and general cable preparation. These are specialist tools designed for professional cable jointers working on power distribution, utilities, substations, renewables, industrial networks and high voltage cable systems.
Thorne & Derrick supply Alroc cable jointing tools together with MV HV cable jointing tools, cable stripping tools, semi-con removal tools, cable insulation stripping tools and cable preparation equipment for LV, MV, HV and EHV cable installations.
Quick Answer: What Are Alroc Tools?
Alroc tools are specialist cable preparation tools used by cable jointers to prepare LV, MV, HV and EHV power cables before jointing or termination. They are used to remove outer sheaths, semi-conductive screens, insulation and other cable layers accurately and safely.
Alroc cable jointing tools are commonly used on 11kV, 33kV, 66kV and 132kV cable systems, including XLPE and EPR insulated cables. They help jointers achieve accurate cutbacks, clean stripping, controlled cutting depths and repeatable cable preparation before installing cable joints, terminations or connectors.
What Are Alroc Cable Jointing Tools?
Alroc cable jointing tools are precision cable preparation tools designed for the controlled removal of cable layers. They are used before installing medium and high voltage accessories such as heat shrink joints, cold shrink joints, cable terminations, separable connectors, plug-in connectors and sealing ends.
In a typical MV or HV cable preparation process, the jointer may need to:
- Remove the outer cable sheath
- Prepare the metallic screen or shield
- Remove bonded or peelable semi-conductive screen
- Strip XLPE or EPR insulation
- Chamfer the insulation or semi-con cutback
- Prepare the conductor for connector installation
- Create accurate dimensions for the joint or termination kit
The aim is to prepare the cable exactly as required by the accessory manufacturer’s installation instructions. Incorrect cutback dimensions or damaged insulation can affect the reliability of the completed joint or termination.
View the full Alroc cable tooling range available from Thorne & Derrick.
Why Are Alroc Tools Used?
Alroc tools are used because cable preparation is one of the most important stages in MV and HV jointing. A cable can pass all factory tests but still fail later if it is damaged during installation or poorly prepared before jointing.
Specialist tools help cable jointers achieve:
- Controlled cutting depth to avoid damaging underlying cable layers.
- Clean cutbacks for joints, terminations and connectors.
- Repeatable preparation across multiple cables and phases.
- Accurate stripping dimensions in line with kit instructions.
- Reduced risk of knife damage compared with manual stripping methods.
- Improved finish quality on semi-con and insulation preparation.
- Safer working by using the correct tool for the cable layer.
The higher the voltage, the more critical preparation quality becomes. On MV and HV cable systems, small cuts, scratches, steps, voids or contamination around the insulation and semi-con screen can create long-term electrical stress points.
Cable Layers That Need Preparation
MV and HV cables are built from several layers. Each layer has a specific role, and each must be prepared correctly before jointing or termination.
For more technical background, see the Power & Cables guide to the screen semi-conductive layer on MV cables.
Types Of Alroc Cable Tools
Alroc manufactures a wide range of cable preparation tools. The correct tool depends on the cable layer being removed, the cable diameter, the insulation type and the accessory being installed.
Browse Alroc tools for cable jointing, termination and preparation.
Semi-Con Screen Removal Tools
The semi-conductive screen is one of the most critical cable layers to prepare correctly. It sits over the cable insulation and helps provide a smooth electrical field between the insulation and metallic screen.
When installing a joint or termination, the semi-con screen must be removed cleanly to the correct cutback length. If it is removed poorly, the cable may be left with scratches, steps, contamination or uneven edges that can create stress points.
Alroc semi-con screen removal tools are used for:
- Bonded semi-con screen removal
- Peelable semi-con screen removal
- Semi-bonded screen preparation
- Cold strippable screen preparation
- Chamfering the semi-con cutback where required
A common example is the Alroc CWB18-60 tool family, used for bonded semi-con screen stripping on MV and HV cables. The exact tool variant must always be matched to the cable type, diameter and screen construction.
View semi-con screen removal tools for MV and HV cable preparation.
Outer Sheath Removal Tools
The outer sheath is the external protective jacket of the cable. It protects the cable during handling, pulling, burial, installation and service. Before jointing or termination, part of the outer sheath must be removed to expose the underlying screen, armour or cable construction.
Outer sheath preparation must be controlled carefully. Cutting too deeply can damage metallic screens, lead sheaths, aluminium screens or other underlying layers. Cutting too shallowly can make the sheath difficult to remove and slow down preparation.
Alroc outer sheath removal tools are used for:
- Circular cutting around the cable
- Longitudinal cutting along the cable sheath
- Controlled depth cutting
- Preparation of armoured and unarmoured cables
- Preparation of LV, MV, HV and EHV cable sheaths
View outer sheath removal tools for cable jointing and termination work.
Cable Insulation Stripping Tools
After the outer layers and screens are prepared, the cable insulation may need to be stripped to expose the conductor for connector installation.
On MV and HV cables, the insulation layer is not simply removed with a knife. It must be stripped cleanly and accurately to avoid leaving grooves, cuts, scratches or uneven surfaces. The insulation may also need to be chamfered or pencilled depending on the accessory design.
Alroc insulation stripping tools are used for:
- XLPE insulation removal
- EPR insulation removal
- Controlled insulation cutback
- Insulation chamfering
- Preparing cables before installing connectors, lugs or ferrules
For example, tools in the Alroc LH range are commonly associated with insulation stripping and cable preparation before installing joints, terminations or connectors.
View cable insulation removal tools.
Alroc Tools For MV & HV Cables
Alroc tools are widely used for medium and high voltage cable preparation, especially on 11kV and 33kV power cables. Selected tools are also used for 66kV, 132kV and EHV cable preparation depending on the cable construction and tool range – an extensive range of cable cutting and crimping tools are also available from Thorne & Derrick by market-leading brands including Cembre and Klauke.
For wider tooling options, see cable and installation tooling for LV, MV and HV power cables.
How To Select Alroc Tools
Selecting the correct Alroc cable tool depends on the cable and the task. The wrong tool can damage the cable or create a preparation profile that does not match the joint or termination kit.
The tool should always be selected using accurate cable data, not assumptions from voltage level alone.
Common Cable Preparation Mistakes
Cable preparation problems can directly affect the long-term reliability of cable joints and terminations.
Common mistakes include:
- Using a knife instead of a specialist tool – manual cutting increases the risk of scoring insulation or damaging underlying layers.
- Selecting the wrong tool diameter range – the tool must match the diameter over the layer being prepared.
- Confusing bonded and peelable semi-con screens – different screen types may require different tools and preparation methods.
- Cutting too deeply – overcutting can damage insulation, metallic screens, lead sheaths or aluminium layers.
- Leaving an uneven semi-con cutback – poor edges can create electrical stress points.
- Not chamfering where required – some accessory designs require a specific chamfer or transition profile.
- Ignoring accessory instructions – cutback dimensions should follow the joint or termination manufacturer’s instructions.
- Poor tool maintenance – blunt blades, worn parts or incorrect settings can reduce preparation quality.
- Contaminating the prepared insulation – cleanliness is critical before installing MV and HV accessories.
For MV and HV work, cable preparation should be treated as a controlled technical process, not a basic stripping task.
Related Cable Jointing Tool Products
Alroc tools sit within the wider cable jointing and cable preparation tooling range.
- Alroc Cable Jointing Tools – specialist tools for LV, MV, HV and EHV cable preparation.
- Cable Jointing Tools – tools for cable stripping, preparation, jointing and termination work.
- Semi-Con Screen Removal Tools – tools for bonded, semi-bonded and peelable screen removal.
- Outer Sheath Removal Tools – cable sheath stripping tools for LV, MV and HV cables.
- Cable Insulation Removal Tools – tools for stripping XLPE, EPR, PVC and PE insulation.
- Multi-Function Cable Jointing Tools – tools for combined preparation operations.
- HV Cable Joints, Terminations & Connectors – accessories installed after cable preparation.
- Semi-Conductive Layer On MV Cables – technical guide to the MV cable screen layer.
Alroc Cable Jointing Tools FAQs
Q: What are Alroc tools used for?
A: Alroc tools are used by cable jointers to prepare LV, MV, HV and EHV cables before installing joints, terminations and connectors. They are commonly used for outer sheath removal, semi-con screen removal, insulation stripping and cable chamfering.
Q: Are Alroc tools used on 11kV and 33kV cables?
A: Yes. Alroc tools are widely used for 11kV and 33kV cable preparation, including semi-con screen removal, outer sheath stripping and XLPE insulation preparation before jointing or termination.
Q: What is a semi-con screen removal tool?
A: A semi-con screen removal tool is used to remove the black semi-conductive screen from MV or HV cable insulation. The screen must be removed cleanly and accurately before installing joints, terminations or connectors.
Q: Why is cable preparation so important?
A: Cable preparation is important because damage to the insulation, semi-con screen, sheath or conductor can affect the reliability of the completed joint or termination. Accurate preparation helps reduce the risk of electrical stress, partial discharge and future cable faults.
Q: Can one Alroc tool prepare every cable layer?
A: No. Different cable layers usually require different tools. Outer sheath removal, semi-con screen removal and insulation stripping are separate preparation tasks, and the correct tool depends on the cable type, diameter and layer being removed.
Q: What information is needed to select an Alroc tool?
A: To select an Alroc tool, you need the cable voltage, cable construction, diameter over the layer being stripped, insulation type, semi-con type, accessory instructions and the specific preparation task being carried out.
Q: Are Alroc tools only for high voltage cables?
A: Alroc tools are commonly associated with MV and HV cable preparation, but selected tools can also be used for LV and EHV cable applications depending on the tool type, cable construction and required preparation task.
Q: What happens if the semi-con screen is removed badly?
A: Poor semi-con screen removal can leave scratches, steps, contamination or uneven cutbacks on the cable insulation. These defects can create electrical stress points and may affect the long-term performance of the joint or termination.
Conclusion
Alroc cable jointing tools are specialist tools used to prepare LV, MV, HV and EHV power cables before installing cable joints, terminations and connectors. They help cable jointers remove outer sheaths, semi-conductive screens and insulation accurately, safely and repeatably.
Correct cable preparation is critical to the reliability of MV and HV cable systems. The right tool must be selected according to the cable voltage, diameter, insulation type, semi-con screen type, cable construction and accessory installation instructions.
Thorne & Derrick supply Alroc cable tools, cable jointing tools, semi-con screen removal tools, outer sheath stripping tools, insulation stripping tools and multi-function cable preparation tools for LV, MV, HV and EHV cable installations.
Klauke EKM60UNV Universal Tool | Cutting, Crimping & Punching in One Compact Solution
March 25th, 2026
klauke ekm60unv – universal cutting, crimping & punching tool
The Klauke EKM 60 UNV is a versatile battery powered hydraulic universal tool engineered that can be used as a battery powered cable crimping tool and battery operated cable cutting tools that comes with one head for crimping, cutting and punching – one tool for all applications.
By combining multiple functions into a single tool, the Klauke EKM 60 UNV tool helps streamline workflows and ensures consistent, high-quality results across a wide range of electrical applications.
compact, portable & powerful Tools
Despite its compact size, the Klauke EKM60UNV delivers powerful hydraulic performance, ensuring consistent results across all applications. Its ergonomic design allows for comfortable one-handed operation, even in confined or overhead working conditions.
The cordless, battery-powered tooling system removes the limitations of manual tools, enabling faster task completion and improved productivity on-site.
reduce equipment – improve efficiency
Carrying multiple tools can slow down installation and maintenance work. The EKM60UNV eliminates this issue by combining three key functions into one device.
- Reduces the number of tools required on-site
- Speeds up installation and maintenance tasks
- Minimises downtime between operations
- Improves workflow efficiency for engineers
For contractors and industrial teams, this results in faster project completion and increased productivity.
built for professional electrical applications
The Klauke EKM60UNV is designed for demanding environments including industrial installations, utilities and panel building. It provides the reliability and precision required for modern electrical systems where performance and safety are essential.
Whether used for installation or maintenance, the tool ensures consistent, repeatable results across all applications.
Compared to larger tools like the EK120UNV, the EKM60UNV offers a more compact and portable solution, making it ideal for everyday use across a wide range of applications.
33kV Cable Stripping | Bonded Semicon Removal Using Ripley US02
June 6th, 2024Application | Stripping 33kV Cable BS7870 XLPE AWS Single Core 500sqmm
Using | Ripley US02 Bonded Semicon Screen Removal Tool
Contractor | Direct Jointing & Power Services Ltd
Cable Jointer & Company Director | Daniel Sowden
Direct Jointing & Power Services Ltd | Installing & Maintaining High Voltage Cables & Power Networks up to 33kV
Contact | [email protected] | 07468533057
More Information | US02-7000 Semicon Shaving Tool | Ripley US02 | Cable Tool HV
33kV Cable Preparation | Pre-Polish
33kV Cable Preparation | Post Polishing
Cable Preparation Tools | Distributed From Stock | Approved SupplierÂ
Ripley US02-7000
Semicon Shaver & Stripping Tool manufactured by Ripley Tools quickly and easily removes bonded semi-con from MV & HV power cables without the requirement for lubrication.
The semicon tool has a unique blade shape which preserves the smooth surface on the XLPE insulation of medium voltage cables typically distributing electrical power at 11kV and 33kV voltages – the Ripley US02 tool eliminates the need for deburring or additional surface finishing of the cable insulation. Its optimal stability design securely supports cables with diameters from 18 mm to 60 mm throughout the shaving operation of the cable preparation process, prior to jointing or terminating medium voltage cables.
The US02 tool provides an exceptionally smooth finish and does not require lubricating grease as the integral wheels provide a sustained motion during the cable preparation process – the US02 has four settings on it that adjust the pitch as it winds down the cable and a stop that enables the jointer to provide a square cut to finish off. The settings are 0.5mm, 1mm, 1.5mm and 2mm.
Thorne & Derrick are now Official Distributors for the Vicera range of Cable Jointing Stands – the introduction of this new product range is an excellent extension to our core ranges of Cable Jointing, Pulling Equipment & Preparation Tooling and we look forward to further supporting efficient, easier and more reliable power cable installations.
Thorne & Derrick distribute the most extensive range of MV HV Medium & High Voltage Cable Joints, Terminations & Connectors from manufacturers including 3M, Prysmian, Nexans Euromold, Elastimold, Pfisterer CONNEX & SEANEX. Heat shrink, cold shrink, push-on and slip-over cable accessories enable the jointing, terminating and connection of 11kV-33kV and 66kV-132kV cables to oil, air or gas insulated switchgear, transformers, motors and overhead lines distributing electricity at medium/high voltages.
T&D hold large stocks of 11kV 33kV 66kV Joints & Terminations suitable for XLPE, PILC and EPR cables, in both heat shrink and Cold Shrink technologies, to service the medium/high voltage power cable accessory requirements of UK and international customers.
Ripley US02-7000 | Stripping Bonded Semicon from N2XS(F)2Y Cable (12/20 (24)kV)
July 13th, 2023
Ripley US02-7000 Semicon Shaver & Stripping Tools
Here Peter Hardman (Jointer – LV HV Cables) is shown expertly using the US02-7000 Tool manufactured by Ripley Tools to remove the bonded semi-conductor screen from Medium Voltage Power Cables – the cable standard type is N2XS(F)2Y (12/20 (24)kV) typically used for MV Power Distribution in several industrial sectors including data-centres.
When correctly selected and used for their intended application, specialised Cable Preparation Tools can and do prevent much of the human error identified in the field as a cause of cable joint or termination failure – this can allow MV HV cable systems to last well beyond the 30 year limit that many consider to be a cables expected life cycle.
Invest in the correct tools, get trained in their use and use them.
Start + Stop | note the integral start/stop facility guaranteeing closely controlled, perfectly clean and precise shaving by the Jointer across all cable diameter applications.
US02
The Bonded Semicon Shaving Tool has a unique blade shape which preserves the smooth surface on the XLPE insulation of medium voltage cables typically distributing electrical power at 11kV and 33kV voltages – the Ripley US02 tool eliminates the need for deburring or additional surface finishing of the cable insulation. Its optimal stability design securely supports cables with diameters from 18mm to 60mm throughout the shaving operation of the cable preparation process, prior to jointing or terminating medium voltage cables.
The US02 tool provides an exceptionally smooth finish and does not require lubricating grease as the integral wheels provide a sustained motion during the cable preparation process – the US02 has four settings on it that adjust the pitch as it winds down the cable and a stop that enables the jointer to provide a square cut to finish off. The settings are 0.5mm, 1mm, 1.5mm and 2mm.
Precision Accuracy & Effortless Repeatability for MV Cable Preparation
No Grease & No Clamps | MV HV Cables up to 60mm Diameter without the requirement for lubrication using Ripley US02-7000.
THORNE & DERRICK
SPECIALIST ELECTRICAL DISTRIBUTOR
Thorne & Derrick supply LV HV Cable Accessories, Installation & Electrical Equipment to service providers working on hyper-scale data centres including Equinix, Virtus, K2, Microsoft, CyrusOne and Interxion. We have recently supplied Warsaw RDCC (Rapid Deployment Data Centres) with sealing systems for the protection of cable ducts against water ingress/gas migration and cable termination products for the connection of 33kV power cables into gas-insulated switchgear and transformers – the project is part of a $1 billion digital transformation plan for Poland announced by Microsoft.
We can assist with the Competitive Supply & Technical Specification of joints, terminations, connectors and preparation tools for the energisation of all types of air or gas insulated electrical equipment from stock up to 66kV.
- Distributors for: 3M Cold Shrink, ABB, Alroc, Band-It, Catu, Cembre, Centriforce, CMP, Elastimold, Ellis Patents, Emtelle, Filoform, Furse, Lucy Zodion, Nexans Euromold, Pfisterer, Polypipe, Prysmian, Ripley, Roxtec.
MV HV – Medium & High Voltage Cable Joints, Terminations & Connectors (11kV 33kV EHV)
Thorne & Derrick | Connecting High Voltages & Energising Data Centres
Cut, Strip, Crimp, Punch – Cable Tools for Panel Building & Electrical Contracting
June 28th, 2022
Cut, Strip, Crimp, Punch – All In One Solutions By Klauke
Cable Tools
Cut, Strip, Crimp, Punch
Panel Building & Electrical Contracting
Anyone who works in building electrical panels, knows that customers might have different requirements, so flexibility and being able to respond and adapt fast is a critical success factor. When Klauke develop new cabling tools, versatility is one of the most important drivers. Designing the best quality tools that solve the problem at hand in that fastest and most efficient way is in Klauke’s DNA.
Below is the best range of cable cutting and crimping tools manufactured by Klauke. They are renowned for high-quality, electrical connection tools for cable crimping, cutting and punching that can be used in panel building installations.
Klauke now offer efficiency and safety for control panel building as part of an all-inclusive worry-free package. Whether it’s cutting, stripping, crimping or punching: our power package has just the tool you need!
| Klauke EK 50 ML Micro| Electromechanical Crimping Tool 0.14-50sqmm
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For Full Klauke Specification – EK 50 ML
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For Full Klauke Specification – EK 30 ID ML |
Klauke EK 30 ID ML | Battery-powered Hydraulic Press Tool 6-120sqmm
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| Klauke EK WF 120 ML | Battery-powered Hydraulic Press Tool for Cable End-sleeves 6-120sqmm
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For Full Klauke Specification –Â EK WF 120 ML
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For Full Klauke Specification – ESM 50 IS |
Klauke ESM 50 IS VDE | Standard Battery-powered Hydraulic Cutting Tool
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| Klauke EK 30 ID ML | Battery-powered Hydraulic Press Tool 6-120sqmm
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For Full Klauke Specification – EK 30 ID ML |
For Full Klauke Specification – EKM 60 ID
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Klauke EKM 60 ID | Battery-powered Hydraulic Press Tool 10-240sqmm
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| Klauke EKM 60/22 | Battery-powered Hydraulic Press Tool 6-300sqmm
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For Full Klauke Specification – EKM 60/22 |
For Full Klauke Specification – EK 35/4 ML |
Klauke EK 35/4 ML | Battery-powered Hydraulic Press Tool 6-150sqmm
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| Klauke EK 50 ML | Electromechanical Cable Crimping Tool 0.14 – 50sqmm
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For Full Klauke Specification – EK 50 ML |
Full Klauke Specification ES 32 F ML & ES 32 ML |
Klauke ES 32 F ML / ES 32 ML | Battery-powered Cable Cutting Tool Ø 32mm
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| Klauke ESM 50 | Battery-powered Hydraulic Cutting Tool Ø 50 mm for Copper and Aluminium Conductors
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Full Klauke Specification – ESM 50 |
Full Klauke Specification – EKM 60 UNV |
Klauke EKM 60 UNV | Battery-powered Hydraulic Universal Tool 6-300sqmm
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| Greenlee LS 50 FLEX | Battery-powered Hydraulic Punching Tool
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Full Greenlee Specification – Greenlee LS 50 FLEX |
Full Greenlee Specification – LS 100 FLEX |
Greenlee LS 100 FLEX | Battery-powered Hydraulic Punching Tool
|
Crimping Cables, Lugs & Tools
Thorne & Derrick distribute Cable Lugs & Cable Connectors to terminate, splice and joint LV MV HV cables – this includes copper, aluminium and bi-metallic connectors and a range of crimping tools for specific use on all Low, Medium & High Voltage cable types.
âž¡ Associated Brands & Products | Klauke | Cembre | Pfisterer Sicon | Cable Crimping & Cable Cutting Tools
Should you require technical assistance to select the correct cable crimping or cable cutting tools please contact us.
Thorne & Derrick are Specialist Distributors of cable tools to enable the preparation of all LV MV HV cables prior to the installation of Joints, Terminations & Connectors – this includes Klauke, Cembre, Alroc and Boddingtons cable jointing tools for removal of cable sheath, screen and insulation on 11/33kV (MV) and 66kV/132kV (HV) power cables.
View the complete range of Cable Crimping & Cable Cutting Tools
