The hire versus buy decision for a diamond core drill comes down to frequency of use. At a certain threshold — roughly 8–12 hire days per year — purchasing a machine costs less than continuing to hire. Below that threshold, hire is the rational choice. This guide provides the numbers to make that calculation, based on current UK hire rates and machine purchase prices.
UK Diamond Core Drill Hire Rates (2025)
UK hire shop rates for a dedicated diamond core drill machine:
| Hire Period | Typical Rate (machine only) | Notes |
|---|---|---|
| Half day (4 hours) | £18–£28 | Often charged at full day rate |
| 1 day | £25–£45 | Standard hire rate |
| Week (5 days) | £90–£140 | Weekly rate is roughly 3–4× daily |
| Core bit (per size, per hire) | £5–£15 | Most hire shops rent bits separately |
The practical all-in cost of a single hire day — machine plus one core bit — typically runs £35–£60. Some hire shops include a basic bit; others charge separately. Always confirm before booking.
Machine Purchase Prices (2025)
| Machine | Power | Price Range | Best For |
|---|---|---|---|
| Makita 8406 | 840W | £220–£280 | Brick/block, compact jobs |
| DeWalt D21583K | 1050W | £340–£420 | All-round UK trade workhorse |
| Bosch GDB 350 WE | 1500W | £380–£460 | Mixed brick and concrete |
| Hilti DD 110-D | 1800W | £850–£950 | Structural concrete, daily use |
Break-Even Calculation
At an average all-in hire cost of £45 per day (machine + bit), and a purchase cost of £380 for a DeWalt D21583K with a Marcrist DCU350 bit set (~£60), the total outlay to own is approximately £440.
Break-even point: £440 ÷ £45 per hire day = approximately 10 hire days.
If you use a core drill more than 10 days per year, buying pays. Fewer than 10 days per year, hire is cheaper. For a plumber fitting two boilers a month (24 boiler flue holes per year, assuming one machine day per boiler install), break-even is reached in under 5 months of ownership.
Hidden Costs of Hiring
- Collection time: Hiring requires a trip to and from the hire shop. On a tight schedule, this adds an hour or more to the job.
- Bit compatibility: Hire shop bits may not suit the specific application. A 107mm bit from the hire shop may be wet-rated when you needed dry, or worn from previous use.
- Availability: Popular machines are not always in stock. Booking ahead is required in busy periods — meaning you pay for a hire day even if the job shifts.
- Damage deposit: Most UK hire shops charge a security deposit (typically £50–£200) held against the machine.
Hidden Costs of Buying
- Storage and maintenance: A dedicated core drill machine needs a carry case and occasional servicing.
- Core bit stock: Owning a machine means stocking at least the two or three sizes you use regularly — 107mm and 117mm for most UK plumbers, plus 52mm for waste pipe runs.
- Upfront capital: £250–£450 out of pocket in one transaction rather than spread across hire days.
SDS Adaptor as a Middle Ground
If your core drilling is limited to 38–52mm holes in standard brick — cable entries, small waste pipes, extractor fan holes in stud walls — an SDS Max adaptor (~£15) used with your existing SDS drill sidesteps the machine hire/buy question entirely. See the SDS adaptor guide for size limits and compatible machines. For the machines worth buying, see best diamond core drills UK.
