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    250-450mm Dial Bore Gauge, 0.01mm

    250-450 measuring range dial bore gauge with measuring depth of 250mm, high-pricision of ±0.01mm. SISCO dial bore gages are built to last, withstanding even the most rigorous use and they're perfect for industrial or commercial applications.
    SKU: SISCO-DBG-250450
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    🚚 Free shipping
    🔙 30-day returns
    📅 Delivery: 7-12 days

    High-performance dial bore indicator with bore diameter measurement as deep as 250mm, with an accuracy of 0.01mm, wide range, high accuracy and strong applicability. The cylinder measurement tool uses metal materials, which are strong and durable; and self-centering makes it easier to use. 

    Dial bore gauge detail

    Insulated handle design

    • Effectively insulate the heat and measure hot parts
    • The product has an anti-counterfeiting code
    Dial bore gauge detail

    Locking device design

    • The measurement data is locked and the data is more accurate
    • Dial clear scale, intuitive and convenient reading


    SISCO dial bore gauges are used in applications where holes, cylinders, and pipes need the be measured, such as automotive, manufacturing, and inspection and calibration uses. Mechanics and machinists use bore gauges to measure wear in cylinder heads.

    Dial bore gauge application



    • Model: SISCO-DBG-109000
    • Measuring Range: 250-450mm
    • Precision: ±0.01mm
    • Division value: 0.01mm
    • Measuring Depth: 250mm
    • Weight: 3kg

    Q1: What is a dial bore gauge?
    A1: A dial bore gauge is an instrument that measures the inner diameter of small holes. Bore gages are critical when it comes to measuring parts that have small holes in them. Typically, these versatile instruments are used as part of a quality control process to ensure that bore sizes are standardized.

    Q2: Why is a bore dial gauge used?
    A2: A Bore Gage is used to measure the inside diameter of a hole or cylinder. This explains why it is referred to by so many different names. You are actually measuring the bore size.

    Q3: How does a dial bore gauge work?
    A3: A typical bore gauge is comprised of a shaft with a dial indicator at the top and a measuring sled at the base. The measuring sled consists of three guides and an actuating plunger. Dial bore gauges give you quick and accurate readings on the size, less than perfect roundness, or wear.

    Tips: How to maintain a dial bore gauge?

    Indication error and adjacent error

    1. Use the dial indicator calibrator for the inner diameter dial indicator with positioning bridge, install the dial indicator on the meter frame, and compress the dial indicator head for one circle, (at this time, the pointer should be pointing at the distance from the axis of the measuring rod. 0.1mm from the upper left), clamp the dial indicator with the locking device. Install the inner diameter dial indicator on the dial indicator calibrator, turn the micrometer head to compress the movable measuring head to the starting point of the working stroke, and adjust the dial indicator to the zero position. Then rotate the micrometer head at intervals until the end of the working stroke. The difference between the maximum value and the minimum value of each point error obtained from the measurement is the calibration result of the indication error; the maximum value of each adjacent error is used as the calibration result of the adjacent error.
    2. The inner diameter dial indicator of the expansion spring type and steel ball type is measured with a dial indicator calibrator. Install the dial gauge on the dial stand, compress it once, and install the inner diameter gauge on the dial gauge calibrator. Measurements are made in the direction of travel of the compression probe. If the working stroke of the probe is less than 0.5mm, measure point by point at an interval of 0.05mm; if the working stroke of the probe is ≧0.5mm, measure point by point at an interval of 0.1mm until the end of the working stroke.

    Thank you for buying industrial test and measurement equipment on, all products sold by SISCO and the partner cover a 12 months warranty, effective from the date of receiving the products.

    What is covered?

    SISCO is responsible for providing free spare parts, and free technical support to assist the customer to repair the defective products until the problem is solved.

    What is not covered?

    • Product purchased from anyone other than a SISCO store or a SISCO authorized reseller.
    • Expendable parts.
    • Routine cleaning or normal cosmetic and mechanical wear.
    • Damage from misuse, abuse or neglect.
    • Damage from use of parts other than SISCO approved.
    • Damage from use outside the product’s usage or storage parameters.
    • Damage from use of parts not sold by SISCO.
    • Damage from modification or incorporation into other products.
    • Damage from repair or replacement of warranted parts by a service provider other than a SISCO authorized service provider.
    • Damage caused by the application environment not meeting the product usage requirements and the failure to perform preventive maintenance.
    5.0 1
    Write your own review Close
    rosebe | 3/22/2023 6:16 PM
    Dial bore gauge exceeded my expectations
    The dial bore gauge I purchased from this company exceeded my expectations. The quality of the gauge and its accuracy are unmatched. The easy-to-read dial and precise measurements have made my job so much easier.