Surface Roughness Comparator Manufacturer,Supplier and Exporter in India
Product Code : EL-TT-13342
Quick Answer: The Surface Roughness Comparator is a set of 30 comparison specimens covering six commonly used machining methods. It is used in workshops to judge the roughness of turned, milled, ground, reamed, polished and lapped parts by sight and touch against a standard set of surfaces.
Last updated: October 2026
Key Features
- Set of 30 comparison specimens
- Six machining methods: 6 turned, 6 end-milled, 6 horizontally milled, 6 surface-ground, 3 lapped and 3 reamed/drilled
- Roughness assessed by visual and tactile (fingernail) comparison
- Used to estimate roughness before accurate measurement with a stylus instrument
- Also used to check blast-cleaned steel surfaces prepared for painting
Technical Specifications
| Specification | Value |
|---|---|
| Specimens | 30 in a set |
| Turned | 6 |
| End-milled | 6 |
| Horizontally milled | 6 |
| Surface-ground | 6 |
| Lapped | 3 |
| Reamed/drilled | 3 |
| Method | Visual and tactile comparison |
About This Product
Surface roughness is harder to measure than length, angle or hardness, and accurate roughness instruments are often unsuited to workshop use. A comparator set gives a practical alternative: the machined part is compared by eye and by fingernail with specimens made by the same machining method. It also helps estimate roughness before accurate stylus measurement and judge the seriousness of damage from nicks, dents and scratches. Students can learn how finish differs between turning, milling, grinding and lapping. The Surface Roughness Comparator can be supplied for export orders from Morocco, South Sudan, Trinidad and Tobago, Palestine, Nicaragua and Belgium.
Frequently Asked Questions
Q1. How many specimens are in the Surface Roughness Comparator set?
The set has 30 comparison specimens: 6 turned, 6 end-milled, 6 horizontally milled, 6 surface-ground, 3 lapped and 3 reamed/drilled.
Q2. How is roughness checked with the comparator?
The machined surface is compared visually and by touch, including the fingernail, with the specimen made by the same machining method.
Q3. What is it used for?
It is used to check roughness of turned, milled, ground, reamed, polished or lapped parts during machining, to check blast-cleaned steel prepared for painting, and to estimate roughness before accurate stylus measurement.
Related: Thickness Testers, Surface Profile Gauges, Electronic Coating Thickness Gauge, Plating Thickness Tester.
For a quotation on the Surface Roughness Comparator, contact School Lab Equipment India.