INSIZE 1177 Digital Back-Jaw Centerline Caliper | Hole Center Distance Measurement
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INSIZE 1177 Digital Back-Jaw Centerline Caliper | 20–1500mm
The INSIZE 1177 Digital Back-Jaw Centerline Caliper is a specialized precision measuring instrument designed for measuring center-to-center distances between holes on machined, fabricated, and industrial components. The unique back-jaw design allows the measuring points to engage holes directly, making centerline measurements easier to perform than with a conventional digital caliper.
CRB Supply offers the 1177 series in 500 mm, 1000 mm, and 1500 mm capacities, providing options for both standard and large-component inspection.
With digital measurement, fine resolution, and stainless-steel construction, the 1177 is well suited for machine shops, fabrication facilities, tooling departments, and quality-control environments.
Key Features
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Specialized back-jaw design for centerline measurements
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Designed for measuring hole-to-hole center distances
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Suitable for holes positioned in the same or offset planes
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Stainless-steel construction
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Digital LCD display
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0.01 mm / 0.0005" resolution
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Metric/inch conversion
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Preset function
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Automatic power-off
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Move-activated digital unit
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CR2032 battery
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Data-output interface
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Available in measuring capacities up to 1500 mm / 60"
Choose the Right Measuring Range
The 1177 series is available in three configurations through CRB Supply:
| Model | Measuring Range | Accuracy | Resolution |
|---|---|---|---|
| 1177-500 | 20–500 mm / 0.8–20" | ±0.10 mm | 0.01 mm / 0.0005" |
| 1177-1000 | 30–1000 mm / 1.2–40" | ±0.12 mm | 0.01 mm / 0.0005" |
| 1177-1500 | 30–1500 mm / 1.2–60" | ±0.15 mm | 0.01 mm / 0.0005" |
Designed for Hole Centerline Inspection
Traditional digital calipers are primarily intended for outside, inside, depth, and step measurements. Determining the center distance between two holes can require additional calculations or specialized measuring equipment.
The INSIZE 1177 is specifically designed around this inspection requirement.
The specialized back jaws allow the operator to position the measuring points at the applicable holes and directly obtain the center-to-center dimension. The design can also be used when holes are located in different planes, providing additional flexibility for inspecting complex components.
Large-Format Dimensional Inspection
The 1177-1000 and 1177-1500 extend the capabilities of the 1177 series to substantially larger components.
These larger-capacity models are useful when inspecting:
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Large machined plates
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Fabricated structures
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Industrial frames
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Large brackets
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Machine components
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Fixtures and tooling
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Welded assemblies
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Automotive components
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Structural components
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Large mounting patterns
The 1177-500 provides a 500 mm capacity for smaller components, while the 1000 and 1500 mm versions accommodate substantially larger hole patterns.
Digital Readout & Measurement Functions
The 1177 digital unit provides a 0.01 mm / 0.0005" resolution and allows measurements to be displayed in either metric or inch units.
The digital system includes:
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ON/OFF
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mm/inch conversion
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SET function
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Preset function
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Preset adjustment
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Automatic power-off
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Motion-activated power
The preset function can be useful when establishing a reference measurement or performing repetitive inspections.
Built for Precision Inspection
The 1177 is constructed from stainless steel for durability in demanding industrial measurement environments.
Its specialized design makes it particularly valuable when centerline dimensions are a critical part of a component's dimensional inspection requirements.
Rather than measuring from an outside edge and calculating the hole center, the 1177 provides a purpose-built method for measuring the relationship between holes.
Applications
The INSIZE 1177 Digital Back-Jaw Centerline Caliper is suitable for a wide range of industrial inspection applications.
CNC Machining
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CNC-machined components
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Machine plates
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Mounting-hole patterns
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Tooling
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Fixtures
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Dies and molds
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Precision brackets
Fabrication & Manufacturing
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Welded assemblies
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Fabricated structures
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Sheet-metal components
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Industrial frames
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Mounting plates
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Structural components
Quality Control
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Incoming inspection
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In-process inspection
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Final inspection
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First-article inspection
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Dimensional verification
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Production quality control
Why Use a Back-Jaw Centerline Caliper?
When the dimension being inspected is the distance between two holes, a standard digital caliper may require additional measurements and calculations.
The 1177's back-jaw configuration is purpose-built for this type of inspection.
This can make repetitive measurements of hole patterns and mounting locations more straightforward, particularly on large components where the distance between features exceeds the capacity of conventional calipers.
Measurement Considerations
For accurate results, keep the measuring points and workpiece clean before measurement. Verify the reference position before beginning an inspection and maintain consistent positioning of the caliper against the holes being measured.
The 1177 is a non-waterproof measuring instrument and should be protected from coolant, liquids, and excessive contamination.
For large-capacity measurements, ensure the caliper is properly supported and aligned with the workpiece so that the measuring points engage the holes consistently.
Technical Specifications
| Specification | 1177-500 | 1177-1000 | 1177-1500 |
|---|---|---|---|
| Measuring Range | 20–500 mm / 0.8–20" | 30–1000 mm / 1.2–40" | 30–1500 mm / 1.2–60" |
| Accuracy | ±0.10 mm | ±0.12 mm | ±0.15 mm |
| Resolution | 0.01 mm / 0.0005" | 0.01 mm / 0.0005" | 0.01 mm / 0.0005" |
| Measurement Type | Hole center distance | Hole center distance | Hole center distance |
| Data Output | Data interface | Data interface | Data interface |
| Construction | Stainless steel | Stainless steel | Stainless steel |
| Battery | CR2032 | CR2032 | CR2032 |
Product Information
Brand: INSIZE
Product Series: 1177 Digital Back-Jaw Centerline Calipers
Available Models: 1177-500, 1177-1000, 1177-1500
Measurement: Hole center-to-center distance
Resolution: 0.01 mm / 0.0005"
Construction: Stainless steel
Data Output: Data interface
Battery: CR2032
Manufacturer Documentation
Refer to the official INSIZE documentation for complete specifications, operating instructions, dimensions, and technical information.