Dial Indicator Bore Gauge 2-6in 0.001in Accuracy - Precision

In this review the HDLNKAK Dial Indicator Bore Gauge set is evaluated for mechanics and machinists who need a reliable tool to check cylinder bore roundness and taper without removing pistons. The bottom line: it is a practical, industrial-grade kit that delivers high precision measurement for most workshop uses, with a useful depth reach and a compact storage case. While assembly and out-of-box functionality received mixed reports from some users, the gauge offers a clear accuracy advantage for routine inspection and repair tasks when set up correctly.

Key Features

• Range: Measures bores from 2in to 6in so it fits a wide range of engine cylinders and sleeves.
• Depth capability: The extender allows measurements up to about 150mm (5.9in) deep so you can inspect deep bores without removing components.
• Accuracy: The system reports an accuracy of 0.01mm (0.0003in) with a dial indicator resolution of 0.01mm, enabling repeatable dimensional checks.
• Two-point contact: Carbide-tipped measuring plunger and two-point anvils detect ovality and taper for geometric diameter problems.
• Complete kit: Includes 12 inserting anvils, adjusting washers, chrome plated handle, extension heads and an ABS storage case for organized transport and protection.

Who It's For

The HDLNKAK bore gauge set suits automotive mechanics, small engine technicians and shop machinists who need to check cylinder out-of-roundness and taper during repair or rebuild work. It is useful where access is limited and users want to measure several bore diameters with one expandable tool.

Less suitable are users who expect a fully calibrated digital readout or plug-and-play operation; some buyers reported mixed functionality out of the box and the set requires careful assembly and verification against a standard before critical measurements.

Pros & Cons

Pros

• Good declared precision with a carbide tip and two-point contact for accurate geometric checks.
• Wide measurement range and deep reach for many engine and cylinder applications.
• Comprehensive accessory set and a durable ABS storage case improve portability and organization.

Cons

• Some customers reported mixed functionality or assembly difficulty initially, so expect setup and verification work before use.

Specifications

Measurement range	2in to 6in (50mm to 160mm)
Maximum depth	Up to 150mm (about 5.9in)
Gauge accuracy	0.01mm (0.0003in)
Dial indicator resolution	0.01mm (0.0005in), range 0 to 12.7mm
Anvils included	12 inserting anvils (various sizes) and 4 adjusting washers
Case	ABS storage case included

Our Verdict

The HDLNKAK Dial Indicator Bore Gauge is a solid value for workshop users who need an economical, high precision gauging solution for 2in to 6in bores and deep inspections. It pairs useful depth capability and a comprehensive accessory set with an accuracy suited to most mechanical inspection tasks; buyers should allow time for careful assembly and verification to get the best results.

Frequently Asked Questions

Can this gauge measure deep cylinder bores?
Yes. With the extension heads it can reach roughly 150mm (5.9in) deep to measure deeper bores without piston removal.

How accurate is the dial indicator?
The kit lists an accuracy of 0.01mm (0.0003in) with a dial resolution of 0.01mm (0.0005in) for the indicator range shown.

Does the set include everything needed?
The package contains the dial indicator, extension heads, chrome plated handle, 12 inserting anvils, 4 adjusting washers, an ABS case and an instruction manual, though initial assembly and setup are recommended.