Roughness Tester

Surface Roughness Tester is a precision measuring instrument designed to evaluate the surface finish quality of machined components, metal parts, molds, and precision products. It measures surface roughness parameters such as Ra, Rz, Rq, and Rt to help manufacturers verify machining quality, improve production consistency, and meet international surface finish requirements.

Surface roughness, commonly referred to in measurements as the “roughness of a surface,” can be defined as the micro-unevenness comprising fine spacing and tiny peaks/valleys formed during product machining. It is typically characterized by the micro-distance (wave spacing) between two adjacent wave peaks or valleys, usually within or smaller than 1 mm. This can also be described as the measurement of micro-profiles, commonly termed “micro-error values.”

Capital Instrument provides portable and advanced Surface Roughness Testers suitable for workshop inspection, laboratory analysis, and on-site quality control. Our roughness testers support different measurement requirements, including flat surfaces, cylindrical surfaces, grooves, and complex components

Our Surface Roughness Tester Solutions

Portable Surface Roughness Tester

Portable Surface Roughness Tester is designed for fast and convenient measurement directly on the production floor. With compact design and rechargeable battery options, it is suitable for machining workshops, maintenance teams, and quality inspection departments.

Key Features:

● Lightweight and easy-to-carry design
● Fast measurement and instant result display
● Suitable for flat, cylindrical, and curved surfaces
● Supports common roughness parameters including Ra, Rz, Rq, and Rt
● Ideal for production line inspection and field testing

Digital Surface Roughness Tester

Digital Surface Roughness Tester integrates advanced processors and digital measurement technology to provide accurate and repeatable surface analysis.

Advantages:

● High measurement accuracy and stability
● Large data storage capacity
● Bluetooth/USB data transmission options
● Compatible with ISO, DIN, ANSI, and JIS standards
● Suitable for quality control and laboratory applications

Roughness & Waviness Tester

For applications requiring comprehensive surface evaluation, roughness and waviness testers can analyze not only surface roughness but also waviness and primary profile characteristics.

They are commonly used for precision components where surface vibration, friction performance, sealing performance, and service life are critical factors.

Applications of Surface Roughness Tester

Surface Roughness Testers are widely used for inspecting precision components across multiple industries.

Automotive Components

● Engine parts
● Transmission components
● Bearings
● Gears
● Hydraulic components

Surface roughness inspection helps ensure proper friction performance, assembly accuracy, and component durability.

CNC Machining & Metal Processing

● CNC machined parts
● Milling and turning components
● Grinding parts
● Cutting tools
● Metal molds

Manufacturers use roughness testers to verify machining quality and maintain consistent production standards.

Mold & Precision Manufacturing

● Injection molds
● Die casting molds
● Precision tooling
● Mechanical parts

Surface finish measurement helps reduce defects and improve product quality.

Aerospace & Industrial Equipment

● Precision mechanical components
● Turbine parts
● Sealing surfaces
● High-performance equipment parts

High-accuracy surface inspection is essential for components operating under demanding conditions.