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Centerless Grinding and Polishing




From soft plastic and aluminum to hardened steel and hard chrome, we centerless grind a diverse range. On our centerless grinders, any custom grinding requirement can be handled efficiently for prototype or large production runs. We perform both thru-feed and end-feed plunge grinding to offer smooth super fine finishes up to 4 micro finish.

Using many types of grinding wheels in the production process, we achieve customer specified tolerances, smoothness, and uniformity in every part. Bar stock, tubing, shafts, and several other cylindrical components of diameters from 1/32" to 2 1/4" can be accommodated on our Cincinnati grinders. Standard electric polishing machines at our job shop polish aluminum, brass, stainless steel, and steel parts to mirror-like finishes. The efficiency of our in house tool grinding operations not only increases the durability of your tool, but also saves tooling costs.





Capabilities  · Equipment Specifications

Capabilities

Materials

Metals (solid bar and tube):
Hasteloy
Kovar
Invar
Rodar
Nickel
Nickel 200
Copper (Including Tellurium Copper)
Bronze
Brass (360, 330, 272, Half Hard, Naval Brass)
Aluminum (6061-T6, 2011-T3, 2024-T4, 7075-T6)

Stainless Steel:
400 series: 410, 416, 416 H.T., 440C, 440A, 440C Vac. Melt., 17-4 PH, 15-5
300 series: 303, 303se, 304, 304L, 316, 321

Steel:
1018
C1018
1020
12L14
1215
4130
4140
41L40
8620
Nitride #3
Stress proof
Ledloy
Tool steel
Nitronic 60

Plastics:
Acetal
Copolymer
Delrin
Homopolymer
Delrin AF
PTFE
Delrin 150
Delrin 100
Acrylic
Ertalyte TX
Ertalyte PET-P
Peek
Ketron
PVDF
Kynar
Nylatron
Nylon
Peek
Polycarbonate
Polypropylene
PPS, Polyphylene Sulfide
PVC
PVDF
Techtron
Ceram P.
UHMW
Tivar
Mechanical Teflon
Virgin Teflon
Teflon
Torlon
Turcite A
Vespel
Vespel SP-1

Grinding Types

End Feed Plunge Grinding
Thru Feed Grinding

Production Runs

Prototyping to high volume production runs

Tolerance

.0002

Finish

4 RMS

Finishing Services

Alodine Plating
Anodizing

Black Oxide Plating

Chrome Plating

Gold Plating

Hard Chrome Plating

Micro Sand Blasting

Nickel Plating

Passivation

Powder Coating

Teflon Plating

Tumble Deburring and Polishing

Zinc Plating

Heat Treating

Aluminum Heat Treating
Bright Annealing

Carbon Restoration

Carbonitriding

Carburizing

Cryogenic Treating

Gas Nitriding

Homogenizing

Hydrogen Heat Treating

Induction Hardening

Neutral Hardening

Nitrowear

Normalizing

Precipitation and Age Hardening

Sand or Glassbead Blasting

Solution Treating

Spheroidzing

Straightening

Stress Relieving

Tempering

Tool and Die Hardening

Inspection Process

ISO Compliant
Comply with Mil-1-45208A

Full time inspector to insure quality

Comparators, Microscopes, and other inspection measuring devices plus instruments

Industries Served

Agriculture
Communications

Computer

Electronics

Food Processing

Heating and Cooling

Marine

Medical

Ordinance

Recreational

Transportation


Equipment Specifications

2 - #2 Cincinnati Grinders

1/32" to 2 1/4" diameter
Rotary Speed: 2375 rpm

4 – Supertec Grinders

1/32" to 2 1/4" diameter
Workhead spindle speeds (RPM) 30-350, inf.var.

Wheelhead spindle motor 5 HP

Workhead motor 2 HP

Rotary Speed: 2375 rpm

2 – Standard Electric 16” Polishing Machines

Power: 40 Kw
Speed: 3200 rpm


 MORE IMAGES 

·  Polishing of Music Slide

·  Small Plunged Parts, Centerless Ground

·  Polished Parts

·  Centerless Machine in Action


M.A.R.'s Engineering Company Inc. | Manufacturer of Screw Machine Products Since 1964