Compact Surface Roughness Tester
Product Specifications:
Range: Up to 800 µm
Accuracy: As fine as 0.0001 µm
Drive Unit Straightness: 0.3 µm/25 mm (SJ-411), 0.5 µm/50 mm (SJ-412)
Measuring Methods: Skidded and Skidless (switchable)
Applicable Standards: JIS (1982/1994/2001), ISO 1997, ANSI, VDA
A surface roughness tester measures the fine texture of a machined surface, expressed as parameters like Ra and Rz. This compact, portable model (Mitutoyo Surftest SJ-410 Series) lets QA and production teams check surface finish directly on the shop floor without sending parts to a lab.
Compact Surface Roughness Tester
The Mitutoyo Surftest SJ-410 Series Compact Surface Roughness Tester is designed for precise surface finish analysis in a variety of industrial situations. Whether on the production line or in a quality control lab, this equipment delivers consistent, extremely accurate surface readings. It is provided by Bombay Tools Supplying Agency Private Limited, a reputable supplier for modern metrology solutions.
What is a Surftest SJ-410 Compact Surface Roughness Tester?
The SJ-410 Series is a cutting-edge, portable surface roughness tester that delivers desktop-class performance while remaining highly portable. This tester, designed for both skidded and skidless measurements, accurately assesses roughness parameters and surface contour. It is suited for use in the automotive, aerospace, and general engineering industries where surface quality is vital.
Features and Benefits
High Accuracy: A wide-range, high-resolution detector combined with a precise drive unit ensures superior measurement accuracy.
Touchscreen Display: A large, intuitive color graphic LCD for simple control.
Flexible measurement: Choose between skidded and skidless modes to suit different settings and surfaces.
Advanced Analysis: Provides simplified contour analysis and extensive surface evaluations.
Standard Compliance: Complies with JIS, ISO, ANSI, and VDA standards.
Portable Design: Delivers desktop-level performance in a tiny, mobile machine.
Extensive Parameters: Supports a wide variety of roughness and profile parameters.
Frequently Asked Questions
What is a portable surface roughness tester used for?
It’s used to measure the fine texture of a machined surface directly on the shop floor, without needing to send the part to a lab. It’s common in QA checks on machined, ground, or polished components.
How accurate is a portable roughness tester compared to a bench profilometer?
This SJ-410 Series model offers accuracy as fine as 0.0001 µm with drive unit straightness of 0.3 µm/25mm (SJ-411) or 0.5 µm/50mm (SJ-412). Portable testers are generally accurate enough for routine QA and in-process checks, while dedicated bench profilometers can offer higher resolution for detailed lab analysis.
What is the difference between a surface roughness tester and a profilometer?
The terms are often used interchangeably, but “profilometer” sometimes refers specifically to bench or lab instruments with higher resolution, while portable roughness testers like this SJ-410 are designed for mobility and speed on the production floor.
Which industries use surface roughness testers?
Industries where surface finish affects performance — such as automotive, aerospace, and general engineering — commonly use roughness testers like the SJ-410 to verify sealing surfaces, bearing fits, and cosmetic finish requirements against JIS, ISO, ANSI, or VDA standards.
What do Ra and Rz mean on a roughness tester reading?
Ra is the average roughness of a surface profile, while Rz reflects the average of the peak-to-valley heights across sampled lengths. This SJ-410 series supports a wide variety of roughness and profile parameters beyond just Ra and Rz.
What is the difference between the SJ-411 and SJ-412 models?
Both are part of the Mitutoyo Surftest SJ-410 Series and share the same accuracy and measuring methods. The published difference is drive unit straightness: 0.3 µm/25mm for the SJ-411 versus 0.5 µm/50mm for the SJ-412 — confirm with BTSA which is better suited to your part length.
Can a portable roughness tester be used on curved or small parts?
Many portable roughness testers are designed with compact probes suited to small or curved surfaces, though reach and probe geometry vary by model. Confirm this SJ-410 model’s probe specification with BTSA for your specific part geometry.
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