Electronic Inside Caliper with Dual Display – 0.005mm Resolution & ±170° Rotating Screen

Description

I. In-Depth Product Analysis

Measuring internal diameters, especially inside deep bores, narrow grooves, and stepped holes, has always been a challenge for traditional external Calipers and micrometers. The Electronic Inside Caliper is specifically designed to master these tasks. Its slim, precision-machined measuring jaws slide easily into tight spaces, quickly and accurately capturing the internal dimension.

The standout feature of this instrument is its dual display system . Unlike standard single-line digital Calipers , this device features a large digital reading combined with an analog trend bar (scale) at the top. This analog display is incredibly intuitive—it visually indicates whether the dimension is approaching the upper or lower tolerance limit, making it far easier for operators to spot variations and evaluate geometric form (like ovality) at a single glance.

Furthermore, the ±170° rotatable display is a game-changer for ergonomics. When measuring internal features deep inside a complex workpiece or a machine spindle, the operator often cannot position their head directly in front of the tool. With this feature, they simply rotate the screen toward themselves for a perfect, strain-free reading. The tool offers interchangeable measuring jaws (Type A with sharp points for narrow grooves, and Type B with spherical/ball tips for standard bores) and supports data output, making it a truly versatile and modern metrology instrument.

II. Technical Specifications

The H-506 series offers two distinct stroke configurations (10mm and 20mm) with various ranges, featuring multiple measuring face types to suit different internal geometries.

10mm Stroke Models:

20mm Stroke Models:

Note: Type A measuring face features a sharp point design for narrow grooves and internal threads. Type B measuring face features a spherical/ball tip design for general bore and inner diameter measurements.

III. FAQ (Frequently Asked Questions)

Q1: What is the advantage of the dual display (digital + analog)?
A: The digital section provides an exact numerical reading. The analog section provides a visual "trend bar" at the top of the screen. As you measure different parts, the bar swings left or right. If you are measuring for ovality (out-of-roundness), you can easily see how much the measurement fluctuates by watching the analog bar move, which is much faster and more intuitive than checking changing digits.

Q2: How does the ±170° rotating display help in the workshop?
A: When measuring internal features inside a deep workpiece or on a machine setup, the display might be blocked or facing away from you. The ±170° rotation allows you to twist the entire screen to face your line of sight. This drastically reduces eye strain and prevents reading errors caused by awkward angles.

Q3: What is the difference between Type A and Type B measuring faces?
A: Type A features a fine, pointed tip design. It is optimized for reaching into very narrow internal grooves, retainer ring slots, and internal threads. Type B features a spherical/ball-shaped tip. This is better suited for measuring standard internal cylindrical bores and diameters, as the ball shape ensures accurate point contact with the curved surface of a hole.

Q4: How do I calibrate this electronic inside caliper for absolute measurements?
A: You need a certified master ring gauge or a certified gauge block used with a setting fixture. Set the inside caliper jaws to the exact internal dimension of the ring gauge, then press the SET button to input the initial value (e.g., 20.000mm). The absolute measurement system then remembers this zero reference for future measurements.

Q5: Can I export measurement data for SPC analysis?
A: Yes. The caliper features an external data output port. By connecting an optional data cable (model numbers P1502 or P1505), you can transfer measurement data in real-time to a computer or data collector for Statistical Process Control (SPC) logging, eliminating the need for manual transcription.

IV. Applications & Industry Uses

• Precision Machining: Measuring internal diameters, step bores, and tricky internal grooves on milled and turned parts.

• Automotive Engine Inspection: Checking the inner diameters of engine cylinders, piston ring grooves, and transmission housings.

• Aerospace Manufacturing: Verifying internal dimensions of hydraulic valve bodies, structural tubes, and critical fasteners.

• Mold & Die Making: Inspecting inner dimensions of injection mold cavities and deep core holes.

• Quality Control Labs: A standard secondary measurement tool to complement bore gauges, offering rapid, high-resolution internal checks on the production floor.

• Maintenance & Repair: Assessing the wear of internal bearing races, hydraulic cylinders, and industrial pump housings.

V. Accuracy & Working Principle (Accuracy & Mechanics)

The H-506 achieves its fine 0.005mm digital resolution through a precision linear displacement sensor integrated into the sliding mechanism. As the measuring jaws are opened, a high-accuracy capacitive or inductive scale detects the movement. The internal microcomputer translates this displacement into both the exact digital numeric value and the corresponding analog bar position on the display. The analog display offers switchable resolutions of 0.01mm, 0.02mm, or 0.05mm, allowing operators to adapt the sensitivity of the trend bar to the tolerance requirements of the specific job.

VI. Calibration & Maintenance

1. Daily Master Ring Check: Before measuring, use a certified master ring gauge to verify the accuracy of the caliper. Insert the jaws into the ring, gently open them until they contact the walls, and confirm the digital reading matches the ring's known ID.

2. Clean the Jaws: After each use, carefully wipe the measuring jaws with a soft, lint-free cloth. Debris or oil on the contact points will directly affect the 0.005mm reading accuracy.

3. Battery Maintenance: The device uses a standard CR2032 battery with auto-power-off. Replace the battery when the screen becomes dim to prevent data errors.

4. Annual Professional Calibration: For facilities requiring ISO 9001 or AS9100 compliance, a formal, traceable calibration by an accredited metrology lab is recommended every 12 months .