Hillary Machinery supplies rotary surface grinders for precision flat grinding, high material removal and production applications. Using a rotating worktable beneath the grinding wheel, these machines can efficiently process single large parts or multiple smaller workpieces while maintaining consistent flatness and surface finish.

Rotary Surface Grinders for Precision Production Grinding

Rotary surface grinders use a rotating worktable beneath the grinding wheel to produce flat, accurate surfaces with efficient material removal. The continuous rotation of the workpiece can provide consistent wheel engagement and make rotary grinding especially effective for production applications.

Hillary Machinery offers Chevalier rotary surface grinders for manufacturers requiring precision, repeatability and productive flat-surface grinding.

How Does a Rotary Surface Grinder Work?

A rotary surface grinder positions the workpiece on a circular table that rotates beneath the grinding wheel. Depending on the application, parts may be held with a magnetic chuck or other suitable workholding.

As the table rotates, the grinding wheel passes across the workpiece surface, removing material and producing a flat finished surface.

Why Use a Rotary Surface Grinder?

Rotary grinding can be an efficient choice when the application requires repetitive flat-surface grinding, larger circular workpieces or multiple smaller parts arranged on the worktable.

  • High material-removal capability
  • Consistent flat-surface grinding
  • Efficient processing of circular components
  • Ability to grind multiple smaller parts in one setup
  • Good production repeatability
  • Reduced non-cutting motion compared with some reciprocating processes
  • Suitable for roughing and finishing applications

Rotary Surface Grinder vs. Reciprocating Surface Grinder

A conventional reciprocating surface grinder moves the worktable back and forth beneath the grinding wheel. A rotary surface grinder instead rotates the workpiece continuously beneath the wheel.

Reciprocating surface grinders can provide excellent flexibility for rectangular parts and general-purpose work. Rotary grinders can be especially attractive for circular parts, multiple-part setups and production applications where continuous table rotation improves throughput.

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Chevalier Rotary Surface Grinders

Hillary Machinery offers Chevalier rotary surface grinders for precision and production grinding applications.

Current Chevalier FRG rotary grinders include hydrostatic turntable designs intended to support smooth table rotation, precision and demanding grinding work.

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Hydrostatic Rotary Tables

A hydrostatic rotary table uses a pressurized oil film to support and guide the rotating table. This design can reduce metal-to-metal contact and support smooth, controlled table motion during precision grinding.

Hydrostatic table construction can be particularly valuable when surface finish, flatness and repeatability are important production requirements.

Rotary Surface Grinder Applications

Rotary surface grinders are used in manufacturing applications requiring accurate flat surfaces and efficient stock removal.

  • Rings
  • Bearing components
  • Flanges
  • Washers and spacers
  • Tooling components
  • Automotive parts
  • Aerospace components
  • Energy-industry components
  • Large circular parts
  • Multiple small parts arranged on a magnetic chuck

Grinding Multiple Parts in One Setup

One advantage of a rotary table is the ability to arrange multiple smaller workpieces across the grinding surface. When workholding and part geometry permit, several components can be ground during the same table rotation.

This can improve production throughput compared with grinding each part separately.

Choosing the Right Rotary Surface Grinder

Rotary grinder selection should begin with the workpiece, required finish and amount of material to be removed. Hillary Machinery can help evaluate:

  • Maximum workpiece diameter
  • Workpiece height
  • Workpiece weight
  • Rotary-table diameter
  • Magnetic chuck requirements
  • Grinding-wheel dimensions
  • Spindle horsepower
  • Required stock removal
  • Flatness requirements
  • Surface-finish requirements
  • Part material
  • Single-part versus multiple-part grinding
  • Production volume
  • Coolant and filtration requirements

Rotary Surface Grinding for Hard & Advanced Materials

Rotary grinding can also be applied to demanding materials when the machine, grinding wheel, coolant system and process are configured appropriately.

Hillary Machinery currently also classifies Chevalier FRG systems for selected ceramic, silicon carbide and quartz machining and grinding applications.

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Rotary Surface Grinder Frequently Asked Questions

What is a rotary surface grinder?

A rotary surface grinder is a grinding machine that uses a rotating worktable beneath the grinding wheel to produce flat surfaces and remove material from workpieces.

What is the advantage of a rotary surface grinder?

Rotary grinding can provide efficient material removal, continuous workpiece presentation to the grinding wheel and productive processing of circular or multiple smaller parts.

What is the difference between rotary and reciprocating surface grinding?

Rotary grinders spin the worktable beneath the grinding wheel, while reciprocating surface grinders move the worktable back and forth. The best configuration depends on part geometry, production volume and grinding requirements.

Can a rotary surface grinder grind multiple parts at once?

Yes. When workholding and part geometry permit, multiple smaller workpieces can be arranged on the rotary table and ground during the same cycle.

What is a hydrostatic rotary table?

A hydrostatic table uses pressurized fluid to support and guide table movement, helping provide smooth rotation and reduce direct mechanical contact between moving surfaces.

What should I compare when buying a rotary surface grinder?

Important factors include table diameter, workpiece size and weight, grinding-wheel capacity, spindle power, material-removal requirements, flatness, surface finish and production volume.

Find the Right Rotary Surface Grinder

Hillary Machinery can help evaluate your workpiece size, material, stock-removal requirements, flatness, surface finish and production volume to identify the appropriate rotary grinding solution.

View Available Rotary Surface Grinders or contact Hillary Machinery to discuss your grinding application.

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