INSIZE 1177-500WL Digital Back-Jaw Centerline Caliper | 20–500mm

The INSIZE 1177-500WL Digital Back-Jaw Centerline Caliper is a specialized digital caliper designed for accurately measuring hole-to-hole center distances, including measurements between holes located in the same plane or offset planes. Its extended back-jaw configuration allows the measuring points to reach into applications where a conventional digital caliper cannot easily establish centerline dimensions.

With a 20–500 mm (0.8–20") measuring range, 0.01 mm (0.0005") resolution, ±0.10 mm accuracy, and built-in wireless data output, the 1177-500WL is well suited for inspection, machining, fabrication, and quality-control environments where center-distance measurements need to be recorded efficiently.

Key Features

• 20–500 mm / 0.8–20" measuring range

• ±0.10 mm accuracy

• 0.01 mm / 0.0005" resolution

• Built-in wireless data output

• Designed for measuring hole center-to-center distances

• Capable of measuring holes in the same or offset planes

• Stainless steel construction

• Digital LCD display

• Metric/inch conversion

• Preset function for establishing a reference measurement

• Automatic power-off function

• CR2032 battery

• Move-activated digital unit helps turn the display on during use

Designed for Hole Centerline Measurements

The 1177 series is specifically designed for applications where the distance between hole centers needs to be measured directly. The specialized back-jaw geometry provides access to holes and features that can be difficult to measure using standard outside-measuring calipers.

This makes the 1177-500WL particularly useful for inspecting fabricated components, machined parts, plates, brackets, frames, and other components containing multiple holes or offset hole patterns.

The caliper can measure center distances in the same plane as well as offset planes, providing a practical alternative to calculating center distances from separate edge measurements.

Built-In Wireless Data Output

The 1177-500WL includes built-in wireless data transmission, allowing measurement data to be transferred without requiring a separate wired data-output cable.

This can be useful in inspection and quality-control workflows where measurements need to be transferred to a computer or data-collection system rather than manually transcribed.

The wireless version uses a dedicated data-transmission button and signal indicator. INSIZE notes that battery life for the built-in wireless version can vary with measurement frequency and is approximately 3–5 months under typical use.

Digital Measurement & Preset Functions

The digital display provides 0.01 mm / 0.0005" resolution, while the preset function allows the operator to establish a reference value before taking measurements.

Controls include:

• ON/OFF

• SET

• mm/inch conversion

• Preset adjustment (+ / −)

• Wireless data transmission

The digital unit automatically powers off after approximately five minutes of inactivity, while moving the digital unit can activate the display.

Technical Specifications

Manufacturer specifications confirm the 1177-500WL's 20–500 mm range, ±0.10 mm accuracy, 0.01 mm resolution, and built-in wireless interface.

Typical Applications

The INSIZE 1177-500WL is suitable for applications involving large components and precision hole patterns, including:

• Machine shop inspection

• CNC machining inspection

• Fabrication and welding

• Sheet-metal fabrication

• Structural component inspection

• Automotive component inspection

• Aerospace component inspection

• Fixture and tooling inspection

• Quality-control departments

• Incoming and final inspection

• Maintenance and repair operations

Why Use a Back-Jaw Centerline Caliper?

Standard digital calipers are primarily designed for outside, inside, depth, and step measurements. Measuring the center distance between two holes can require additional calculations or specialized tooling.

The 1177-500WL is purpose-built for this type of inspection. Its back-jaw configuration allows the measuring points to engage the holes directly, helping the operator establish the center-to-center dimension without relying on separate edge measurements.

For production and inspection environments, this can make repetitive hole-pattern measurements more straightforward and reduce the amount of manual calculation involved.

Important Measurement Considerations

For best measurement accuracy, the measuring jaws and workpiece surfaces should be clean before use. INSIZE recommends maintaining consistent and appropriate measuring force during measurement.

The 1177-500WL is a non-waterproof digital measuring instrument and is intended for use within a working temperature range of approximately 0–40°C (32–104°F) with relative humidity not exceeding 80%.

INSIZE 1177 Series

The 1177 family is available in several measuring ranges and data-output configurations. If you require a different capacity, contact CRB Supply to confirm availability and configuration.

For the CRB Supply product listing, the 1177-500WL is the applicable model. The other models are shown above for reference to the INSIZE product family.

Documentation

Manufacturer: INSIZE
Product Series: 1177 Digital Back-Jaw Centerline Calipers
Model: 1177-500WL

For technical documentation, specifications, and operating information, refer to the official INSIZE documentation.

Spec sheet PDF