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Cincinnati
Viking / RK

centerless grinding

When Cincinnati developed the centerless grinding process, the goal was to offer superior machine accuracy, reliability and ease of use. That’s exactly what Cincinnati centerless machines provide. With thousands of international customers, across numerous industries, the renowned Cincinnati centerless grinders set the standard for centerless grinding.

Superior rigidity and stiffness

Built on an epoxy granite or cast iron base, selected specifically for superior rigidity, vibration dampening, tight tolerancing and thermal characteristics, the Cincinnati Viking and RK centerless grinders are the stiffest machines available. High stiffness ensures optimum accuracy - even while achieving the fastest possible production and high stock removal rates.

Check out our Cincinnati Viking / RK flyer to learn more.

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high precision for tight tolerances

With the ability to grind to very tight tolerances, the Cincinnati Viking and RK grinders negate the need for multiple grind passes. In addition, long, round bars can be ground from beginning to end with the same tolerance. This helps eliminate waste and, ultimately, saves you time and money.

High stiffness also enables these machines to achieve compensation adjustments of 0.001 mm. This level of precision means less wheel wear and a much better surface finish.

A complete, automated solution for ultimate accuracy

We can provide the expertise and the automation to make your production process as efficient as possible. We offer turnkey solutions that include components to automate your grinding operation, including infeed / outfeed systems and a gauging system.

The Cincinnati Viking and RK can be integrated easily into new and existing product lines. In addition, they are compatible with a number of different control systems, including Landis 6400, Allen Bradley, Siemens and Fanuc.

flexibility to GRIND A WIDE VARIETY OF MATERIALS

The Cincinnati Viking and RK centerless grinding machines can use super-abrasive (CBN) as well as conventional wheels. This opens up the possibility to grind a wider variety of materials, including stainless steel, inconel and titanium.

These machines are ideal for the grinding of high precision parts used in the medical and aerospace industries. They are also widely used in the automotive, agricultural, appliance, power tools and fluid power sectors.

Additional key machine features include:

  • 0.001 mm machine resolution
  • Single screw swivel adjustment
  • Arranged for plunge-feed or through-feed operation
  • Anti-friction slide-way systems
  • ‘Twin-Grip’, dual support anti-friction spindle bearings
  • Thermally stable bed design
  • Best-in-class, 3,000,000+ lb/in static stiffness
  • Fast and easy set-up and wheel changeover    

CONTINUAL AFTERMARKET SUPPORT

In addition to building new machines, we provide after sales service as well as service of existing machines. Also, we can retool or refurbish existing machines, and pride ourselves on our after-market support. 

specifications

  Cincinnati Viking Cincinnati RK
WORKING CAPACITY  

Min. / Max. outer diameter

1.2 - 80 mm

12.7 - 152 mm

grinding wheel  

Sizes / width

250 mm

508 mm

Max. / Min. OD

450 / 300 mm

610 / 431 mm

Motor power

15 / 30 kW

37 / 55 kW

Peripheral speed

45 (60) m/sec

45 (60) m/sec

Regulating Wheel  

Sizes / width

250 mm

508 mm

Max. / Min. OD

355 / 255 mm

355 / 279 mm

Motor power

3.3 kW

3.3 kW

Operating speed

10 - 600 rpm

10 - 300 rpm

Infeeds  

Max. plunge infeed

1,500 mm/min

1,500 mm/min

Min. plunge infeed

0.1 mm/min

0.1 mm/min

Dimensions  

Dimensions (W x D x H)

3,100 x 2,700 x 2,300 mm

3,300 x 2,800 x 2,700 mm

Machine weight

9,072 kg

11,794 kg

  Cincinnati Viking Cincinnati RK
WORKING CAPACITY  

Min. / Max. outer diameter

0.05” - 3.2”

0.5” - 6”

grinding wheel  

Sizes / width

9.8”

20”

Max. / Min. OD

17.7” / 11.8”

24 “ / 17”

Motor power

15 / 30 kW

37 / 55 kW

Peripheral speed

148 ft/sec

148 ft/sec

Regulating Wheel  

Sizes / width

9.8”

20”

Max. / Min. OD

14” / 10”

14” / 11”

Motor power

3.3 kW

3.3 kW

Operating speed

10 - 600 rpm

10 - 300 rpm

Infeeds  

Max. plunge infeed

4.9 ft/min

4.9 ft/min

Min. plunge infeed

0.004 in/min

0.004 in/min

Dimensions  

Dimensions (W x D x H)

10.2’ x 8.9’ x 7.6’

10.8’ x 9.2’ x 8.9’

Machine weight

20,000 lb

26,000 lb