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TRUEGARD Soluble Oil - 5 Gallon Pail

TRUEGARD HD 258 Cutting Oil - 5 Gallon Pail

by Truegard
SKU TG_HD258_5

$199.07 - $199.07
$199.07
$199.07 - $199.07
$199.07

TRUEGARD HD-258 Cutting Oil is an exceptionally heavy duty cutting oil for tough ferrous machining applications. This highly fortified oil is also intended for use as an additive to improve the performance of lighter duty oils on machining of stainless steel and nickel based alloys. Applications include drilling, tapping, threading, broaching, gear cutting, stamping, punching, and drawing.

TRUEGARD HD-258 Cutting Oil uses several different types of additives to provide the lubrication necessary in very heavy duty metalworking. Film strength and the ability for the oil film to carry heavy loads without rupturing is very important in heavy duty machining, especially when working with stainless steels and exotic alloys. The presence of different types of sulfur and fat allow this oil to sustain heavy loads at various temperatures with no loss of effectiveness. The moderate viscosity of the oil imparts wipe resistance and slight adhesiveness to this cutting oil. These properties are important in heavy, slow machining applications.

TRUEGARD HD-258 Cutting Oil is ideal for use as a cutting oil base or as an additive to improve lighter duty oils. The viscosity is light enough to facilitate easy mixing, but heavy enough to help improve load carrying ability. The extremely high additive content and the aggressive nature of this oil provides efficient and cost effective boosting of other cutting oils.

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Product Data Sheet
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Frequently asked questions

Find answers to common questions about our products and services

  • Yes. HD-258 is specifically formulated for stainless steel and nickel-based alloys, which are notoriously difficult to machine because they generate high heat and stress on the cutting tool. The combination of different sulfur types and fat additives maintains a stable, unruptured oil film even under the extreme pressures these materials impose.

  • HD-258 is explicitly designed to be used either straight or as an additive blended into lighter-duty cutting oils to improve their performance. Its viscosity is intentionally moderate - light enough for easy mixing, but heavy enough to meaningfully raise the load-carrying ability of the base oil it is added to.

  • HD-258 is optimized for heavy, slow-speed machining applications. Its moderate viscosity imparts wipe resistance and slight adhesiveness to the cutting zone - properties that are most beneficial when feeds and speeds are low and cutting forces are high, such as in broaching, tapping, threading, and gear cutting.

  • Different extreme-pressure situations activate different additive types: fatty (oiliness) additives provide lubrication at lower temperatures and moderate loads, while sulfur-based additives become active at higher temperatures and heavier loads. Using both types together means the oil maintains effective film strength across a wide range of cutting conditions without losing effectiveness as heat or pressure increases.

  • The product is formulated specifically for tough ferrous machining applications, including stainless steel and nickel-based alloys. Active sulfur additives present in heavy-duty cutting oils like this one can cause staining or corrosion on reactive non-ferrous metals such as copper and brass, so it is not recommended for those materials.

  • Because HD-258 carries an extremely high additive concentration, only a relatively small amount needs to be blended into a lighter base oil to significantly upgrade its extreme-pressure and load-carrying performance. This means a single pail can treat a larger volume of existing cutting oil, stretching the value of the product across more operations.