Powered by ™ Translate

Bel-Ray Specialty Lubricants: Tech Notes, Vol 4, Issue 5

July, 2013


Bakery Lubrication with No-Tox Food Grade Lubricants

The bakery’s need for No-Tox Lubricants is self-evident but often ignored in the pursuit of minimum production costs. Generally, the degree of regulation and inspection has the greatest influence on their use. Nevertheless, No-Tox Lubricants should be used and when all potential costs are compared to actual costs, their use becomes a very inexpensive insurance policy.

Bel-Ray NSF H1 No-Tox Lubricants can be safely used on all general equipment found in the bakery. Moreover, the use of 

No-Tox Lubricants is not a sacrifice in equipment performance. Bel-Ray No-Tox Lubricants perform as well as, or better than, general purpose industrial lubricants with the added advantage of reduced liability and consumer protection.

The lubrication requirements for the bakery are generally the same as for industrial plants. The larger operations have a generous quantity of gearboxes, hydraulic systems, chains (both oven and drive), fans, oiled and greased bearings, dividers and compressors. Some of the lubricated components are conveyors, blenders, ventilation systems and packaging lines. However, the one thing that is both unique and common to all bakeries is the oven and its complimentary equipment.

Most bread baking ovens are essentially a long tunnel with a single conveyor that is chain driven and carries the bread through the heated chamber. The speeds and temperatures are regulated to have a properly baked loaf of bread at the end of the oven. Lubrication of the oven chain is critical for continuous production and profitability at the bakery.

Bakery operation dictates that the ovens operate continuously. Therefore, most operations start on Sunday and run until Saturday. Generally, only the time from the last shift of one week to the first shift of the new week is, or can be, devoted to maintenance, especially chain lubrication.

(See Tech Notes, Vol 4, Issue 4 April 2013 article Oven Chain Key to Proper Bakery Lubrication at

The Seven Application Points for No-Tox Food Grade Lubrication:

  Oven bearing grease - No-Tox Food Grade Synthetic Heavy Duty Grease 2 (63370) with weekly re-lubrication and purging of old dried out grease.

General bearing grease - No-Tox HD Food Grade Grease 2 (62280) is recommended.

  Spiral Freezer bearing grease - No-Tox Food Grade Low Temperature Grease (62470) is recommended.

Before reaching the oven, bread dough is usually delivered to a chamber (proofer box or oven) where it resides for approximately one-half (1/2) hour for the yeast to grow (dough rise). Temperatures are held at 38°C to 40°C (100°F to 104°F) and humidity is held as close to 100% as possible. Usually, the proofer has a conveyor that is chain driven, which is often the source of rusting complaints.

  Proofer Chain Oil - No-Tox Food Grade Waterproof Chain Lubricant Spray (64070) is an ideal solution. Again, the lubrication cycle is weekly and immediately after wash-down. No-Tox Food Grade Waterproof Chain Lubricant Spray is also suggested for general chain oiling.
  Spiral Freezer chain oil - No-Tox Syntra Food Grade Synthetic Oil ISO VG 32 (64234). There is no substitute for this low temperature application.
  Compressor and Vacuum pump oils - Various OEMs have different viscosity requirements for these two applications and every bakery uses different brands of equipment. The suggested lubricant series for these applications is No-Tox Syntra Food Grade Synthetic Oil ISO VG 32-100.

After traveling through the oven, baked goods are allowed to cool before wrapping. An automatic de-panner lifts bread from the pan with flexible fingers, which are under slight vacuum, and places the hot loaf on a cooling conveyor.

  Dough Divider Machines, Knifes and Bread Pans - can be safely lubricated with NSF 3H No-Tox Food Grade Divider Oil series ISO VG 15-68.
  Helical and Worm Gear Lubrication - is easily managed with the No-Tox HD Food Grade Oil ISO VG 220 (62687) and ISO VG 460 (62689).

If temperature extremes are an issue, we suggest using No-Tox Syntra Food Grade Synthetic Oils ISO VG 220 (64239) and ISO VG 460 (64241) in lieu of No-Tox HD Food Grade mineral oils.

  Hydraulic Lubrication - and general oiling is also managed with No-Tox HD Food Grade Oils ISO VG 32-68.
  Air Line Lubrication - commonly found to be lubricated with hydraulic oil ISO VG 32. The correct lubricant for this application is No-Tox Food Grade Air Line Lubricant ISO VG 22 (62050).

In summary, the lubrication requirements of a bakery are specialized only in the bake oven chain application. All Bel-Ray Bakerylubes and No-Tox Food Grade Lubricants are Kosher and Pareve approved, as well as Halal certified.

The Bel-Ray Bakery Lubrication Guide can be found on the Bel-Ray website Industrial section at


Bel-Ray 6 in 1 Lubricant - The True Multipurpose Lubricant

There are a lot of different penetrating, lubricating, rust protecting and water displacing oils with a multitude of other uses out there on the shelves. These products all have their uses but it may surprise you to find that many of these products aren’t really designed for multiple uses and are really only good at providing a single or a small number of uses. Spray large enough of any product and you will probably see results, but the products that truly perform in all aspects as a multipurpose lubricant only need a small amount applied in most applications to be effective. Certain products which are only truly water displacers are touted as the solution to every mechanical problem there is. Other products which are only truly penetrating oil for loosening rusted parts are touted as being the solution to all of the causes and effects of the rust in the first place. Bel-Ray 6 in 1 is a product that has a very specific range of uses. One of which is for garage work on your motorcycle, car and has more performance than any squeaking part can overcome.

In the Bel-Ray laboratories we did a brief side-by-side study of the Bel-Ray 6 in 1 next to two of our competitors, WD-40 and PB Blaster, for basic properties. We tested rust protection, penetrating ability, wear protection and viscosity to get a very general look at each of these products. All three products passed the rust test with no spots of rust and complete protection on all surfaces.

The penetration test was carried out by using two clean metal plates in contact with one another. The product was applied to the edge of the plates and allowed to penetrate for 15 minutes. After the 15 minutes, the plates were separated and the penetration distances were measured by length and width onto the plates from the applied edge. The Bel-Ray 6 in 1 penetrated further than either of the other two in both length and width measurements (see Figure 1). This shows how strong a pull the mixture of solvents and oils in the Bel-Ray 6 in 1 has on metal surfaces.

The wear results show the scar on the metal surface after 1 hour of rotating contact between two steel pieces. The result for the Bel-Ray 6 in 1 shows a wear result of 35% less wear than the average of the two other products (see Figure 2). This demonstrable property shows a very clear defining line between these types of products and their performance.

The oil sprayed onto a part is the only thing stopping metal from grinding on metal. The viscosity of oil is the property that determines the thickness of the oil film. That thickness keeps metal parts from contacting one another and provides a layer of lubrication. Higher viscosity base oil will typically remain on the surface longer than thinner oil because its thickness gives it a stronger bond to the metal surface (see Figure 3).

Overall, Bel-Ray 6 in 1 outperformed both competitors in each of the basic property tests we ran. This means that it is truly a high performance multipurpose lubricant rather than a single specialized product. Lately, many competitors have been adding more specialized products to their lines for specific applications, which makes you wonder why they would need specialized products if their flagship products were so good to begin with. Bel-Ray 6 in 1 remains the multipurpose lubricant of choice in professional garages and personal workshops. This product penetrates deep into rusted parts, leaves a strong oily lubricant behind on the surfaces, eliminates rust problems, removes moisture from parts and keeps the moisture out afterward.

Remember though, just because a product will dissolve a styrofoam cup, doesn’t mean it is a good penetrating oil, it means it is extremely corrosive to plastics. Just because a product will push existing water out, doesn’t mean it will keep the water out. Finally if a product says it is the solution to 2000+ problems, then it is probably a solution to one problem with 2000 different ways to word it.


P&H Selection of Gear Oils

When selecting the correct gear oil for enclosed gear cases, P&H provides guidelines for the correct viscosity and filterability.

Viscosity at operating temperatures is the most important aspect of the gear oil. The operating temperature at the maximum high temperature, as well as the lowest temperature, must be taken into consideration. You can determine the high operating temperature by measuring the oil temperature after the machine has worked one-half of a shift under heavy load conditions on one of the hottest days. Too low a viscosity will allow the teeth surfaces to contact each other resulting in unacceptable tooth profile wear.

P&H specifies a minimum oil viscosity of 400 cSt at the maximum operating temperature for the hoist, crowd, swing and propel transmissions on electric shovels. Once the gear oil viscosity has been determined for the maximum operating temperature, the cold weather aspect of the oil has to be taken into consideration. The cold weather viscosity is determined by the Pour Point of the gear oil. Normally the viscosity of the oil at the coldest temperature should be 8° to 14° above the Pour Point. If the ambient temperature drops below the Pour Point of the gear oil while the machine has been idle, the oil will not flow into the pump, starving the gears and bearings of lubricant. In this situation, the machine should be started and slowly moved under no-load conditions until the gear oil warms up. If the sump temperature is still below the Pour Point temperature, the oil should be changed to a lower viscosity. If single viscosity oil cannot provide the correct viscosity for seasonal temperature changes, then seasonal oil viscosity changes will be required.

Oil viscosity will also affect oil filtration. When selecting oil filters, the oil viscosity and the temperature range need to be considered. The normal pressure drop across filter elements is 10 psi or .7 Bars. This pressure drop must not be exceeded both when the oil is at the maximum and minimum temperature. To ensure the correct filter element is selected, the oil viscosity at the maximum and minimum temperatures must be known along with the flow rate of the oil through the filter. Filter suppliers can provide filter curve charts that can be used to select the correct filter media and size.

In summary, selection of gear oils must be made on the conformance to the P&H specifications 497 (E.P. Gear Oils) or 474 (Synthetic Gear Oil Extreme Pressure) on the minimum viscosity of 400 cSt at maximum operating temperature, and on Pour Point of the oil vs. the minimum operating temperature.

Bel-Ray provides a complete line of gear oils for enclosed gear cases. Reference Bel-Ray’s website at to review Bel-Ray 100 Gear Oils, Bel-Ray Synthetic Gear Oils and Raylene Extreme Pressure Gear Oils or contact your Bel-Ray Mining Representative.