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VP 940P

Synthetic Carbide Grinding Fluids

It is well known in the industry that the grinding of carbide materials requires the use of an oil-free synthetic lubricant that will not leach out the cobalt binder from the carbide. This is done through the substitution of a small handful of raw materials in the synthetic grinding fluids for some raw materials that are not as reactive with the cobalt binder.  It is important to use a suitable synthetic carbide grinding fluid with grinding this type of metal to assure the integrity of the part and to make sure the part does not become brittle.

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1 (800) 244-9004

Available Sizes

VP 940P is available in the following sizes: 

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5 gal. pail

5 gal. pail

55 gal. drum 

55 gal. drum 

275 gal. tote

275 gal. tote

Features & Benefits


  • Chlorine-free
  • Special cobalt leaching inhibitors
  • Unique extreme pressure package
  • Excellent for diamond wheel grinding of carbide


  • Prevents cobalt leaching for carbide grinding
  • Exceptional tramp oil rejection and little to no foam
  • Suitable for aerospace applications
  • Best in class resistance to bacteria growth
  • Cobalt leaching below 1 ppm
  • Eliminates deep red to purplish color change due to dissolved cobalt into the coolant
  • Non-irritating to operators’ skin
  • Better Surface finishes and improved structural integrity


AppearanceClear Blue Liquid
Diluted AppearanceClear Light Blue
OdorMild Industrial
Specific Gravity1.03
Concentrate pH9.5
pH, 5 % dilution9.4
Freeze/Thaw CyclesPassed x3

Questions About Our Products?
Contact Our Sales Engineers.

Our Sales Engineers are widely regarded as the most competent and responsive in the business: they know the material, the workpiece, the tools and the fluids that you need to make it right. Together with our Field Application Engineers, they’re available with on-site assistance and technical support when you need it.

Applications & Usage

ValCOOL recommends using Val-U-Clean or K-5-P cleaner before adding VP940P to a machine.

The recommended concentration for VP940P is 3-5% for optimum results. However, results for any operation can only be determined through testing.

Maintaining the coolant at its optimum concentration is achieved through daily refractive index checking.

No special precautions are necessary with respect to seals or valves.

For Use In:

  • Cast Iron Machining
  • Stainless
  • Copper Yellow Metals
Machining Operation
  • Milling
  • Drilling
  • Grinding
Machine Tool Configuration
  • High Pressure
  • Open Gantry
  • Non-Venting Machines
  • Machine Tables Walked On
  • Central Systems
  • Underground Sumps
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Recommended Concentration5 – 10%
Refractive Index Range2.0 – 4.0
Refractive Index Multiplier Factors2.5
Available ColorAmber or Blue
FragranceMild odor

Additional Details

Cobalt Leaching Protocol

A carbide swarf test was run on VP940P, and was diluted at 20 parts tap water to one part fluid, by weight. 100.0g of diluted fluid was placed in a 250 ml Erlenmeyer flask to which was added 1.57g of carbide swarf containing 9.5% cobalt; yielding a total cobalt concentration of 1500 ppm in the diluted fluid. The sealed flask was tagitated for five days at room temperature. The flask was removed, the fines allowed to settle, and the extract filtered using 0.2-micron Teflon syringe filters. The extract was analyzed for dissolved cobalt by Atomic Absorption (AA) analysis.

Health & Safety

See the most recent SDS which is available directly from ValCOOL, your local representative or authorized distributor. ValCOOL uses only raw materials not listed as carcinogenic by IRAC.

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Refractive Index Monitoring

2.5 x multiplier

 Percentage Ratio Refractometer Reading  
19 to 1 2.0 
10 9 to 1 4.0 
15 6 to 1 6.0 
20 4 to 1 8.0 

Fluid compatibility and machinability should always be tested first; as fluid concentration, metal alloy, and machining operation are variable.

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1 (800) 244-9004