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200-225mm 7.87-8.86" Three Point Internal Bore Micrometer - 3227 Series (Insize)
| Range (mm) | 200-225 |
| Range (inch) | 7.87-8.86 |
| Setting Ring | 212.5mm (optional) |
| b | 29 |
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Description
The Insize 3227 Series Internal 3-Point Bore Micrometer is a precision tool designed for accurate inside-diameter measurements across the 200–225 mm range. Its three-point contact inside the bore provides stable, repeatable readings, making it suitable for engineers, machinists, technicians, and hobbyists who need dependable inner dimensions.
Built for durability, this micrometer features carbide measuring faces for wear resistance and a ratchet stop to ensure consistent pressure during measurement. It arrives ready to use with extension rods and two sets of interchangeable jaws to cover different measuring ranges, plus an optional setting ring (6312) for quick, repeatable setup.
- Three‑point bore contact: Delivers stable, repeatable measurements by evenly distributing contact inside the bore for consistent results across the 200–225 mm range.
- Carbide measuring faces: Provide exceptional wear resistance, helping maintain accuracy and extend tool life in daily workshop use.
- Interchangeable jaws and extension rods: Two jaw sets plus included extension rods adapt to varying bore sizes and depths; the optional setting ring (6312) enables fast, repeatable calibration.
Designed to improve workflow and confidence on the shop floor, the 3227 bore micrometer delivers reliable performance with straightforward setup. Its robust construction and versatile jaw options help you complete inner-diameter checks quickly, reduce rework, and maintain tight tolerances across demanding applications.
Part Numbers
- Protool Part Number
- 3227-225
- Brand
- Insize
- Category
- Measuring Tool
Need cutting data? Call 01732 887334 or email sales@protool-ltd.co.uk.
Delivery
Free UK mainland delivery on orders over £50 ex VAT. In-stock items ordered before 4:30pm are dispatched the same working day. Full delivery information.
Returns
14-day returns on unused stock items in original packaging. Special-order and bespoke tooling is non-returnable. Read our returns policy.
Technical Support
Over 30 years of machining experience behind the counter. Call 01732 887334, Mon–Thurs 8:30–17:30, Fri 8:30–16:30.
Trade Accounts
Credit accounts, contract pricing and scheduled call-off orders available for trade customers. Apply for an account.
What time are Protool open?
We are open Monday to Friday between 8:30am and 5pm.
Do you offer Free Next Day delivery?
Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.
We also offer the following:
- Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
- DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
- Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
- DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.
For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.
*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.
Full Range: Three Point Internal Bore Micrometers - 3227 Series (Insize)
View full collection →You are viewing 3227-225. Click any other SKU to view its full details.
| Product SKU | Metric Range (mm) | Metric Range (Inch) | Ip Rating | mm or Inch | Price | Stock | Order |
|---|---|---|---|---|---|---|---|
| 3227-8 | 46240 | 0.24-0.31 | IP65 | mm|inch | £273.39 | 4-5 days | |
| 3227-10 | 46303 | 0.31-0.39 | IP65 | mm|inch | £273.39 | 4-5 days | |
| 3227-12 | 46366 | 0.39-0.47 | IP65 | mm|inch | £273.39 | 4-5 days | |
| 3227-16 | 42705 | 0.47-0.63 | IP65 | mm|inch | £219.13 | 4-5 days | |
| 3227-20 | 16-20 | 0.63-0.79 | IP65 | mm|inch | £219.13 | 4-5 days | |
| 3227-25 | 20-25 | 0.79-0.98 | IP65 | mm|inch | £285.91 | 4-5 days | |
| 3227-30 | 25-30 | 0.98-1.18 | IP65 | mm|inch | £285.91 | 4-5 days | |
| 3227-40 | 30-40 | 1.18-1.57 | IP65 | mm|inch | £325.57 | 4-5 days | |
| 3227-50 | 40-50 | 1.57-1.97 | IP65 | mm|inch | £354.78 | 4-5 days | |
| 3227-63 | 50-63 | 1.97-2.48 | IP65 | mm|inch | £393.39 | 4-5 days | |
| 3227-75 | 62-75 | 2.44-2.95 | IP65 | mm|inch | £408.00 | 4-5 days | |
| 3227-88 | 75-88 | 2.95-3.46 | IP65 | mm|inch | £427.83 | 4-5 days | |
| 3227-100 | 87-100 | 3.43-3.94 | IP65 | mm|inch | £449.74 | 4-5 days | |
| 3227-125 | 100-125 | 3.94-4.92 | IP65 | mm|inch | £563.48 | 4-5 days | |
| 3227-150 | 125-150 | 4.92-5.91 | IP65 | mm|inch | £636.52 | 4-5 days | |
| 3227-175 | 150-175 | 5.91-6.89 | IP65 | mm|inch | £705.39 | 4-5 days | |
| 3227-200 | 175-200 | 6.89-7.87 | IP65 | mm|inch | £814.96 | 4-5 days | |
| 3227-225 Viewing | 200-225 | 7.87-8.86 | IP65 | mm|inch | £1,039.30 | 4-5 days | |
| 3227-250 | 225-250 | 8.86-9.84 | IP65 | mm|inch | £1,173.91 | 4-5 days | |
| 3227-275 | 250-275 | 9.84-10.83 | IP65 | mm|inch | £1,361.74 | 4-5 days | |
| 3227-300 | 275-300 | 10.83-11.81 | IP65 | mm|inch | £1,581.91 | 4-5 days |
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