Machinery Breakdown Insurance for CNC & Industrial Equipment: A Practical UK Guide

Introduction: why CNC downtime is so expensive

If you run CNC machines, presses, lasers, compressors, conveyors, or other industrial equipment, you already know the real cost of a breakdown isn’t just the repair bill. It’s the missed production slot, the delayed customer delivery, the overtime to catch up, the scrapped materials, and the reputational hit when you can’t ship on time.

Machinery breakdown insurance (often called engineering insurance or mechanical/electrical breakdown cover) is designed for exactly this problem: sudden and unforeseen damage to plant and machinery that isn’t usually covered under a standard commercial property policy.

This guide explains what machinery breakdown insurance is, how it applies to CNC and industrial equipment, what to watch for in the small print, and how to buy the right cover in the UK.

What is machinery breakdown insurance?

Machinery breakdown insurance covers the cost of repairing or replacing insured equipment when it suffers unexpected mechanical or electrical failure.

It typically sits alongside your main business insurance and can be arranged as:

• A standalone engineering policy
• An add-on to a commercial combined policy
• A packaged policy for manufacturers and engineering firms

The key point: it’s aimed at internal failure (mechanical/electrical), not just external events like fire or flood.

Why standard property insurance often isn’t enough

Many businesses assume “we’ve insured the building and contents, so we’re covered.” But property policies often focus on insured perils (fire, storm, escape of water, theft) and may exclude or limit:

• Mechanical breakdown
• Electrical failure
• Short-circuiting and arcing
• Boiler/pressure plant failure
• Sudden internal damage to machinery

That’s where machinery breakdown cover fills the gap.

What types of CNC and industrial equipment can be covered?

Policies vary, but cover commonly applies to:

• CNC milling machines, lathes, routers, grinders
• Laser cutters, plasma cutters, waterjets
• Press brakes, stamping presses, injection moulding machines
• Industrial robots and automation cells
• Air compressors, dryers, vacuum pumps
• Chillers, HVAC plant, extraction and filtration systems
• Conveyors and handling systems
• Generators and electrical switchgear
• Forklifts and mobile plant (sometimes under separate plant policies)

You’ll usually need to provide an equipment schedule with:

• Make/model/serial numbers
• Year of manufacture
• Replacement value (new-for-old or like-for-like)
• Location and use

Common causes of breakdown in CNC and industrial settings

Insurers see patterns. Typical causes include:

• Electrical faults: power surges, control board failure, inverter/drive failure
• Mechanical failure: bearing failure, spindle damage, gearbox failure
• Cooling/lubrication issues: coolant pump failure, blocked lines, overheating
• Hydraulic/pneumatic faults: leaks, valve failure, compressor issues
• Operator error: incorrect setup, collision, tool crash (cover depends on wording)
• Foreign objects/contamination: swarf ingress, dust, moisture
• Pressure plant issues: boiler failure, compressor receiver problems

Understanding your risk profile helps you choose the right extensions and limits.

What machinery breakdown insurance typically covers

While wording differs by insurer, cover often includes:

1) Repair or replacement costs

• Parts and labour to repair the insured machine
• Replacement of the machine if it’s beyond economical repair
• Sometimes includes temporary repairs to keep production moving

2) Expediting expenses (optional)

This can cover extra costs to reduce downtime, such as:

• Overtime labour
• Express shipping for parts
• Specialist call-out fees
• Temporary hire of equipment (where available)

3) Business interruption due to breakdown (optional but important)

Often called Machinery Breakdown Business Interruption or Engineering BI. It can cover:

• Loss of gross profit due to reduced turnover
• Increased cost of working (e.g., outsourcing production)
• Standing charges and wages (depending on basis of cover)

For CNC shops, this is frequently the difference between “painful” and “business-threatening.”

4) Damage to surrounding property (sometimes)

If a breakdown causes collateral damage (for example, a motor failure leading to overheating and damage to adjacent components), some policies respond, but this can be limited. It’s worth checking how the engineering section interacts with your property section.

What’s commonly excluded (and where CNC firms get caught out)

Exclusions are where most disputes happen. Common ones include:

• Wear and tear and gradual deterioration
• Corrosion, erosion, scaling
• Lack of maintenance or known defects
• Consumables and tooling: cutters, inserts, belts, filters (sometimes limited)
• Software issues and data loss (usually under cyber, not engineering)
• Poor workmanship or defective design (may be excluded or limited)
• Deliberate acts or continued operation after a known fault
• Consequential losses unless you have the BI extension

CNC-specific watch-outs:

• Tooling and fixtures are often not “machinery” unless scheduled.
• Spindle and drive failures may be covered, but insurers may apply depreciation or maintenance conditions.
• Collision/tool crash cover can vary widely.

Key policy features to get right

When you’re comparing quotes, focus on the details that affect claims.

Sum insured / basis of settlement

Ask:

• Is it new-for-old replacement?
• Is it indemnity (market value) for older machines?
• Are there sub-limits for certain components (e.g., control systems)?

For CNC equipment, replacement lead times can be long. Underinsuring can leave you unable to replace like-for-like.

Excess (deductible)

Engineering excesses can be higher than property excesses, especially for:

• Electrical breakdown
• High-value machines
• Older equipment

Choose an excess you can absorb without delaying repairs.

Maintenance and inspection conditions

Engineering insurers often expect:

• Planned preventative maintenance (PPM)
• Records of servicing and inspections
• Compliance with manufacturer recommendations

If you can’t evidence maintenance, claims can be reduced or declined. A simple maintenance log can make a big difference.

Cover for hired-in plant / temporary replacement

If you rely on hire equipment during outages, check whether:

• Hire costs are covered under increased cost of working
• There are limits and time periods
• The policy requires insurer consent before incurring costs

Business interruption indemnity period

For CNC and industrial operations, consider:

• How long it would take to source parts
• Specialist engineer availability
• Machine build times (weeks to months)
• Commissioning and calibration time

A 3-month indemnity period can be too short for specialist machinery.

How claims typically work (and how to make them smoother)

If you suffer a breakdown:

1. Make the site safe and prevent further damage.
2. Notify your broker/insurer quickly (don’t wait for a full diagnosis).
3. Gather evidence:

• Photos/video of the fault
• Alarm codes, controller logs, error messages
• Maintenance records and service reports
• Engineer diagnosis and repair quote

1. Keep a downtime timeline:

• When production stopped
• What jobs were delayed
• Any outsourcing or overtime costs

If you have BI cover, keep clear records of:

• Lost orders or delayed shipments
• Additional costs to keep customers supplied
• Changes in turnover vs normal trading

Risk management: reduce breakdowns and improve insurability

Insurers price engineering risk based on frequency and severity. Practical steps that help:

• Documented PPM schedules and service contracts
• Condition monitoring (vibration, temperature, oil analysis)
• Surge protection and stable power supply (UPS where needed)
• Coolant management and filtration
• Operator training and collision prevention procedures
• Keeping critical spares on hand (belts, pumps, sensors)
• Clear housekeeping to reduce swarf/dust ingress

These steps can reduce downtime and can also support better terms.

How much does machinery breakdown insurance cost?

Pricing depends on:

• Total value of machinery insured
• Type of equipment and process risk
• Claims history
• Maintenance regime and inspection records
• Excess level
• Whether you add BI and expediting expenses

As a rule, the cheapest policy is rarely the best fit for CNC operations. The right question is: what would one major breakdown cost us in cashflow and lost profit?

Who needs machinery breakdown cover most?

It’s particularly relevant if:

• One or two machines are critical bottlenecks
• You run tight delivery schedules or just-in-time production
• You have high-value spindles, drives, lasers, or control systems
• You can’t easily hire a replacement machine
• You supply regulated or high-spec sectors where delays are costly

Even smaller workshops can be exposed if a single CNC is responsible for most revenue.

Choosing the right cover: a quick checklist

Before you buy, confirm:

• Which machines are insured (schedule and locations)
• Basis of settlement (new-for-old vs indemnity)
• Excesses for mechanical and electrical breakdown
• BI extension included? Indemnity period?
• Expediting expenses included? Limits?
• Any maintenance/inspection conditions
• Any exclusions for collision, tooling, or operator error

If you’re unsure, a broker can help you align the wording to how you actually operate.

FAQs: Machinery Breakdown Insurance for CNC & Industrial Equipment

Is machinery breakdown insurance the same as equipment warranty?

No. A warranty is a manufacturer or supplier promise, usually limited in time and scope. Machinery breakdown insurance is a policy that can cover sudden failure, including on older equipment, subject to terms and maintenance.

Does it cover CNC spindle failure?

Often yes, if the failure is sudden and unforeseen and not due to wear and tear or poor maintenance. The exact response depends on the policy wording and evidence.

Does it cover tool crashes and collisions?

Sometimes, but not always. Some insurers treat collision/operator error as an extension or apply specific exclusions. Always ask for clarity.

Is electrical breakdown covered?

Typically yes, but insurers may apply different excesses or conditions for electrical components and control systems.

Can I cover business interruption from a breakdown?

Yes, via a machinery breakdown business interruption extension. This is especially important for CNC firms where downtime hits cashflow.

What information do insurers need to quote?

Usually: machinery schedule, values, locations, maintenance approach, and any previous breakdown claims.

Will poor maintenance invalidate a claim?

It can. If the insurer can show the failure was due to lack of maintenance or a known defect, they may reduce or decline the claim.

Final thoughts: protect production, not just the premises

For CNC and industrial businesses, the building is only part of the risk. The real engine of revenue is the machinery inside it. Machinery breakdown insurance helps you plan for the unexpected, protect cashflow, and keep customers supplied when the worst happens.

If you’d like, I can tailor this into a version for your exact niche (precision engineering, fabrication, plastics, aerospace supply chain, medical device manufacturing, etc.) and add a stronger local UK call-to-action.

Call to action

If your CNC or industrial equipment is essential to your output, it’s worth reviewing whether your current policy truly covers breakdown, repair costs, and downtime.

Speak to a specialist commercial insurance broker to review your machinery schedule and make sure your cover matches your operational risk.