Three-Point Internal Micrometer 20-25mm for for Cylinder Bore Measurement
- Three-point micrometer centering self and aligning self.
- Measurement can be taken closer to the bottom of blind bores and deep holes with extension rod.
- Carbide-tipped contacts points with ratchet stop.
- Supplied with setting rings and fitted case.
This three-point internal micrometer series offers measuring ranges from 6-8mm up to 40-50mm, with graduations of 0.001mm
(within 12mm/0.5") or 0.005mm (over 12mm). The carbide-tipped three contact points minimize measurement errors, significantly improving
accuracy compared to calipers.
The self-centering three-point contact design ensures precise bore measurements, particularly effective for blind and through holes.
The micrometer automatically centers and aligns itself for stable, accurate readings.
Complete sets are available covering wide measurement ranges for various industrial applications.
| Order No. | Measuring Range | Graduation | Accuracy | Setting Rings | L1 | A | Extension Rods |
|---|---|---|---|---|---|---|---|
| KM-2315-8 | 6-8mm | 0.001mm | ±0.004mm | Φ6mm | 54.5mm | 1.5mm | 100mm |
| KM-2315-10 | 8-10mm | 0.001mm | ±0.004mm | Φ8mm | 54.5mm | 1.5mm | 100mm |
| KM-2315-12 | 10-12mm | 0.001mm | ±0.004mm | Φ10mm | 54.5mm | 1.5mm | 100mm |
| KM-2315-16 | 12-16mm | 0.005mm | ±0.004mm | Φ16mm | 80mm | 0.5mm | 150mm |
| KM-2315-20 | 16-20mm | 0.005mm | ±0.004mm | Φ16mm | 80mm | 0.5mm | 150mm |
| KM-2315-25 | 20-25mm | 0.005mm | ±0.004mm | Φ25mm | 90mm | 0.5mm | 150mm |
| KM-2315-30 | 25-30mm | 0.005mm | ±0.004mm | Φ25mm | 90mm | 0.5mm | 150mm |
| KM-2315-40 | 30-40mm | 0.005mm | ±0.004mm | Φ40mm | 97mm | 0.5mm | 150mm |
| KM-2315-50 | 40-50mm | 0.005mm | ±0.005mm | Φ40mm | 97mm | 0.5mm | 150mm |
| Order No. | Measuring Range | Graduation | Accuracy | Setting Ring | L1 | A | Extension Rods |
|---|---|---|---|---|---|---|---|
| KM-2315-0.35 | 0.275-0.35″ | 0.001″ | ±0.00016″ | 0.275″ | 2.18″ | 0.06″ | 4″ |
| KM-2315-0.42 | 0.35-0.42″ | 0.0001″ | ±0.00016″ | 0.35″ | 2.18″ | 0.06″ | 4″ |
| KM-2315-0.5 | 0.425-0.5″ | 0.0001″ | ±0.00016″ | 0.5″ | 2.18″ | 0.06″ | 4″ |
| KM-2315-0.65 | 0.5-0.65″ | 0.0002″ | ±0.00016″ | 0.65″ | 3.2″ | 0.02″ | 6″ |
| KM-2315-0.8 | 0.65-0.8″ | 0.0002″ | ±0.00016″ | 0.65″ | 3.2″ | 0.02″ | 6″ |
| KM-2315-1 | 0.8-1″ | 0.0002″ | ±0.00016″ | 1″ | 3.6″ | 0.02″ | 6″ |
| KM-2315-1.2 | 1-1.2″ | 0.0002″ | ±0.00016″ | 1″ | 3.6″ | 0.02″ | 6″ |
| KM-2315-1.6 | 1.2-1.6″ | 0.0002″ | ±0.00016″ | 1.6″ | 3.88″ | 0.02″ | 6″ |
| KM-2315-2 | 1.6-2″ | 0.0002″ | ±0.0002″ | 1.6″ | 3.88″ | 0.02″ | 6″ |
- Ensure measuring claw and scale are clean and dust-free to maintain accuracy.
- Perform calibration before use to verify correct initial readings.
- Clean and apply anti-rust oil after each use.
- Store in dry, ventilated, dust-free environment.
- Not suitable for measuring rough or burred surfaces.
This three-point internal micrometer is designed for precise measurement of holes and slotted holes in various industrial applications including:
- Machinery manufacturing
- Automobile production
- Aerospace components
- Electronic parts manufacturing
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.