More than a Chunk of Granite
Surface plates may seem no different than any other working surfaces, but they are actually precision instruments. Despite granite’s toughness and durability, continual use will ultimately create wear spots on the surface. These seemingly tiny surface variations can cause distortions in measurements and ultimately affect product quality. Over the years
System Scale has sold and serviced numerous surface plates. Although wear is unavoidable, our experience has taught us a lot about how proper care and maintenance can extend your surface plate’s life and accuracy.
Top 10 tips for Surface Plate Maintenance
1. Plate Rotation
The easiest way to increase the life of your surface plate is to periodically rotate your plate’s orientation. Regularly rotating your work area slows the formation of wear spots.
2. Keep It Clean
To avoid excess buildup of grease and other debris, clean the surface plate before and after work is performed.
3. Choose the Right Cleaner
Avoid water-based solutions, as granite tends to absorb water. Acetone and alcohol-based cleaners will give the best results but cause a cooling effect on the plate.
4. Don’t Overtighten Hold-Down Bolts
Even though the bolts are on the underside, overtightening can add unneeded stress to your surface plate. Check with your plate manufacturer for the correct torque limits.
5. Check for Scratches and Nicks
Check the plate for scratches and nicks regularly. Burrs often form around nicks, creating additional uneven surfaces. Remove burrs using a silicon carbide stone.
6. Avoid Overload
Make sure to distribute all applied weight evenly over a large area. Don’t apply more pressure or weight than necessary.
7. Surface Plates Are Instruments, Not Tables
Only use surface plates for their intended purpose. Never place food or drinks on a surface plate—the acid present in many foods and drinks can cause small holes to form on the surface.
8.Avoid Dust
Cover your surface plate when it’s not in use. Dust works as an abrasive material and can speed up surface wear.
9.Maintain Constant Environmental Conditions
To avoid excessive expansion and contraction, humidity and temperature should be kept consistent. Keep plates out of direct sunlight, as this can cause rapid and uneven heating.
10.Keep a Regular Calibration Schedule
Depending on workload, surface plates should be calibrated every six months to three years. To determine the right interval for your plate, regularly test it with a repeat-o-meter to see how quickly it deviates from accepted tolerances.
Beyond Regular Surface Plate Maintenance
Although following these steps will help extend the life and usability of your surface plate, all plates will eventually suffer wear from everyday use. Regular calibration and occasional resurfacing are the only ways to ensure a truly flat and level surface. We recommend establishing a regular calibration interval and performing maintenance whenever noticeable wear is present. .