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Precision Grinding Services

At ACAL, our commitment lies in providing quality service to our customers. Our experience with precision grinding technologies and quality management systems will ensure that you the the best results for your project. 

Most parts that need to be ground require very tight tolerances to be held, or a certain finish. To maintain these tight tolerances and finish call outs, every operation requires overall perfection. Having practiced precision grinding for over 70 years, our experience and expertise allow us to successfully handle all your projects.


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Surface Grinding

Surface grinding is a precision grinding process where the workpiece is secured to a table and the grinding wheel slowly removes material from the top side of the workpiece. This process is used when there are tight tolerances on flat surfaces, or if parts are required to be perfectly flat or parallel. This process also yields some of the lowest micro-finished or all grinding processes.


Internal Grinding

Internal grinding is a precision grinding process where material is removed using a grinding wheel on a spindle. This is one of the more difficult processes and requires highly trained personnel with the most advance machines. 


External Grinding

External grinding is a precision grinding process where the workpiece is spun between centers and the grinding wheel removes material from the outside of the workpiece. ACAL uses both, straight and angle head, grinders providing the capability to produce no-lead finishes, hold specific surface finishes, tapers, and remove material from shoulders and OD's simultaneously.


Surface GrindingInternal GrindingExternal GrindingGrinding Equipment

Surface Grinding

Feature

Description

Size

Minimum: 0.250"

Maximum: 10.00"

Overall Length

16" Wide X  32" Long

Chucking Type

Magnetic

Micro Finish8 Ra or Better
Parallel Tolerance.0002"
Flatness Tolerance.0002"
Positional Tolerance.0002"



Internal Grinding

Feature

Description

I.D. Size

Minimum: 0.375"

Maximum:  6.00"

Overall Length

14" Max, depending on depth of the I.D. bore

Max Swing

8"

Micro Finish

Up to 6 Ra

Cylindricity

.0001"

Diametrical Tolerance

.0002"

Positional Tolerance

.0002"

Roundness Tolerance

.00005"


External Grinding

Feature

Description

O.D. Size

Minimum: 0.500"

Maximum: 12.00"

Overall Length

60" Max, depending on diameter of O.D.

Max Swing

12"

Micro Finish

Up to 4 Ra

Cylindricity

.0002"

Positional Tolerance

.0002"

Roundness Tolerance

.00005"


Grinding Equipment

Internal

  • Okamoto IGM-15C
  • Heald ID Grinder 273A Universal
  • Okamoto Grinder IGM15NC2

External

  • Jones & Shipman 10 X 18 Auto Cycle
  • Jones & Shipman 10 X 24 Auto Cycle
  • Okamoto CNC820 NC 8 X 20
  • Toyoda 45M GPN 5A 32 X 100
  • Okamoto OGM NCAG 12 X 24

Surface

  • Okamoto 16 X 32 AutoFeed Surface

Honing

  • Sunnen MBC 1800 Power Stroker
  • Sunnen EC-3500 Power Stroker