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DEW Home›Machine Tools & Manufacturing Equipment›Grinding
Machine Tools & Manufacturing Equipment · Category Intelligence

Grinding

Abrasive material removal for tight tolerance and fine surface finish — often the last operation that puts a part in-spec. The pick is driven by part geometry (flat, round, or between-centers-less) and the tolerance/finish target.

◆ Deep category · engineer-grade decision intelligence

Product types

Where engineers draw the lines within grinding.

Surface Grinding
Flat, parallel faces on a reciprocating or rotary table. The workhorse for flat precision — die plates, gauge blocks, parallels.
Cylindrical (OD/ID) Grinding
Round parts held between centers or in a chuck. Bearing journals, shafts, bores to micron roundness and finish.
Centerless Grinding
Part rides on a work-rest blade between grinding and regulating wheels — no centers. High-volume round parts (pins, rollers) with excellent roundness.
Tool & Cutter / 5-Axis Grinding
Sharpens and forms cutting tools and inserts; CNC 5-axis grinds complex flute geometry from carbide blanks.
Jig / Profile / Creep-Feed Grinding
Jig for precision holes/locations; creep-feed removes deep stock in one slow pass — turbine fir-tree roots, form profiles.

Specs that matter

The numbers to compare first — and which are hard deal-breakers.

Grinding capacity (table / swing / length)
Defines the largest part that fits the geometry you're grinding.
Deal-breaker
Achievable tolerance & roundness (µm)
The whole reason to grind — must beat the print's tightest class.
Deal-breaker
Surface finish capability (Ra)
Governs whether you hit finish without a further lap/polish step.
Deal-breaker
Spindle power & wheel speed (m/s)
Drives removal rate and suits the wheel type (conventional vs superabrasive).
Key
In-process gauging & auto compensation
Holds size across the run as the wheel wears — essential for production tolerance.
Key
Wheel dressing (rotary/CNC dresser)
Keeps the wheel sharp and true; form dressing enables profile grinding.
Key
CNC axes / interpolation
Enables profile, angle, and multi-feature grinding in one setup.
Nice-to-know
Coolant delivery & filtration
Controls burn and finish; superabrasive wheels need clean, well-aimed coolant.
Nice-to-know

How engineers decide

Rules of thumb behind the common trade-offs.

Centerless or between-centers?
Centerless for high-volume straight round parts where you can't or won't drill centers — fastest throughput. Between-centers when you need concentricity to a datum or the part has shoulders/steps.
Conventional or superabrasive (CBN/diamond) wheel?
CBN for hardened steels and high production — holds form, long life, less heat. Diamond for carbide and ceramics. Conventional (Al2O3/SiC) for general-purpose and lower volume where wheel cost dominates.
Creep-feed vs traditional reciprocating?
Creep-feed for deep forms in one slow, heavy pass (turbine roots) — needs high coolant flow to avoid burn. Reciprocating for general flat work and shallow stock.
How do I stop thermal burn?
Lower removal rate or wheel speed, keep the wheel sharp (dress often), flood the arc with clean high-pressure coolant, and choose a softer/open wheel grade for the material.
▼ From the field

What goes wrong — War Stories

Expensive failure modes engineers design around.

⚠ Grinding burn / metallurgical damage
Cause: Excess heat in the grind zone — dull wheel, too-aggressive feed, poor coolant
Design around it: Dress the wheel, reduce infeed, aim high-pressure coolant into the arc, use a friable/open wheel; verify with etch/Barkhausen check.
⚠ Chatter marks
Cause: Wheel imbalance, worn spindle, resonance
Design around it: Balance and true the wheel, dress properly, check spindle bearings, alter speed to move off resonance.
⚠ Out-of-tolerance drift over the run
Cause: Wheel wear and thermal growth
Design around it: Use in-process gauging with auto size compensation and a warm-up cycle.
⚠ Poor roundness (centerless)
Cause: Wrong work-blade height/angle or wheel setup
Design around it: Set blade angle and center height per the part, dress the regulating wheel, and check the odd-lobing setup.

Key builders

Manufacturer-direct sources we anchor specs to.

StuderOkamotoJUNGKellenbergerANCAWalter (United Grinding)BlohmMägerleToyodaGlebarDANOBAT

Standards we hold specs to

ISO 230Test code for machine-tool accuracy & repeatability
ISO 16089Safety requirements for stationary grinding machines
ISO 525 / ISO 603Bonded abrasive products — dimensions & specification
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