Description
Product Overview
The Kanon FCM Flange Caliper (300mm) is a highly specialized piece of dimensional metrology equipment. Unlike standard vernier calipers, this tool is expressly engineered for the precision measurement and inspection of flange ring grooves.
- Purpose-Built for Flanges: This caliper is designed to measure ring joint flange grooves strictly within JPI (Japan Petroleum Institute) and similar international standards. It is an absolute must-have for machine shops repairing or manufacturing heavy-duty pipe flanges, pressure vessels, and petrochemical industry components.
- Interchangeable Probes: The defining feature of the FCM series is its ability to utilize four sets of specialized, replaceable V-shaped probes (No. 1 through No. 4). By swapping the probes, you can adjust the caliper to perfectly seat into various sizes of ring grooves to measure the pitch diameter.
- Large 300mm Capacity: With a 300mm (approx. 12″) measuring range, this specific model is sized to handle substantial industrial flanges, making it a critical inspection tool for heavy-duty pipeline machining.
- Traditional Vernier Accuracy: It utilizes a classic, high-contrast mechanical vernier scale. This means there are no batteries to die, no glass scales to shatter, and no delicate electronics to get ruined by aggressive cutting fluids on the shop floor.
Condition
Used (Good Condition).
This specialty caliper is in used condition, showing normal signs of shop floor use, but it remains fully functional.
- Mechanical Integrity: The slide moves smoothly along the beam, and the vernier scale remains crisp and easy to read.
- Important Note: Please review the photos carefully to see which specific V-shaped probes are currently installed or included with this caliper, as it is designed to take interchangeable probe sets (No. 1 to 4) depending on the groove size you are measuring.
Brand Information
Bestool-Kanon (Nakamura Mfg. Co., Ltd.) is a highly respected Japanese metrology brand. While perhaps best known globally for their legendary torque wrenches, their specialty measuring instruments—like centerline and flange calipers—are highly prized by master machinists for their robust, lifetime-grade Japanese construction.
Specifications
| Feature | Specification |
| Brand | Kanon / Bestool-Kanon (Japan) |
| Model | FCM Series (Flange Caliper) |
| Type | Specialty Ring Groove Vernier Caliper |
| Measuring Range | 300mm |
| Special Feature | Interchangeable V-Shape Probes (No. 1-4) |
| Application | Flange ring groove inspection (JPI standard) |
| Condition | Used / Fully Functional |
Keywords
Kanon FCM caliper, Kanon 300mm caliper, flange caliper, ring groove caliper, JPI standard flange, specialty vernier caliper, pipe flange measuring, Bestool-Kanon, Japanese metrology.









