What is Klüber Staburags NBU 12/300 KP?
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What is Klüber Staburags NBU 12/300 KP?
STABURAGS NBU 12/300 KP (article number 017062) is a long-term grease for rolling and plain bearings, based on a mineral oil and a barium complex soap thickener. Klüber documents it for long-term and lifetime lubrication of drafting equipment in spinning machines (upper and lower rollers), tension and eccentric rollers, cardan shafts, and rolling bearings in fans and ventilation systems, in a service range of -20 to +130 °C.
What the manufacturer documents
Klüber describes STABURAGS NBU 12/300 KP as a rolling and plain bearing grease with good wear protection, good pressure absorption, resistance to water and reliable corrosion protection. The published product information lists the composition and performance data below. It does not publish a decoded meaning for the name "12/300 KP", so treat the designation as Klüber's product name and use the product information for the technical substance.
One correction for buyers comparing lubricants: the published composition lists a mineral base oil and a barium complex soap. No solid lubricant such as molybdenum disulfide appears in the published product information, and Klüber does not publish an extreme pressure (EP) classification for this product. If your application relies on documented solid-lubricant or EP performance, request the current product information before ordering.
Published specification
| Property | Value |
|---|---|
| Base oil | Mineral oil |
| Thickener | Barium complex soap |
| Lower service temperature | -20 °C |
| Upper service temperature | +130 °C |
| Worked penetration, DIN ISO 2137, 25 °C | 285 to 315 (0.1 mm) |
| Base oil kinematic viscosity at 40 °C | approx. 220 mm²/s (approx. 18 mm²/s at 100 °C) |
| Drop point, DIN ISO 2176 | ≥ 220 °C |
| Speed factor (n × dm) | approx. 350,000 mm/min |
| Shear viscosity, 25 °C at 300 s⁻¹ | 5,000 to 9,000 mPas |
| Density at 20 °C | approx. 0.97 g/cm³ |
| Colour | Brown |
| Minimum shelf life, unopened, dry and frost-free | approx. 60 months |
| Pack sizes | 400 g cartridge, 1 kg can, 25 kg bucket |
Scroll the table horizontally to view all columns.
Source: Klüber product page for STABURAGS NBU 12/300 KP and the Klüber product information sheet for article number 017062. Klüber publishes these values as guide values; confirm against the datasheet supplied with your delivery.
The worked penetration of 285 to 315 (0.1 mm) sits between NLGI 1 and NLGI 2. If a machine builder specifies an NLGI grade for a lubrication point, check the current datasheet and the machine list before ordering.
Where the product information documents use
Klüber documents STABURAGS NBU 12/300 KP as a rolling bearing grease for long-term and lifetime lubrication of:
- Drafting equipment in spinning machines, upper and lower rollers
- Tension and eccentric rollers
- Cardan shafts
- Rolling bearings in fans and ventilation systems
This is a textile machinery and plant ventilation profile: long service intervals, moderate speeds, and points that are awkward to reach, which is what a lifetime lubrication approach is for. Drafting rollers run at moderate speeds with steady loads, and the barium complex structure's documented resistance to water helps in mills where humidity and fibre-borne moisture are part of the environment.
If your bearing is not on this list, the grease can still fit, but the burden of proof moves to the application data: bearing type and size, speed, measured temperature, load direction, and relubrication access. A machine builder's lubrication list takes priority over a generic product description.
Applying and relubricating
The product information describes application by brush, spatula, or conventional metering systems. Pack sizes are a 400 g cartridge, a 1 kg can, and a 25 kg bucket, which covers both hand greasing and central systems fed from a reservoir.
For rolling bearings that are regreased periodically, a widely used starting rule for the relubrication quantity is G = 0.005 × D × B, where G is the quantity in grams, D is the bearing outside diameter in millimetres and B is the width in millimetres.
Example: relubrication quantity for a 6210 deep groove ball bearing
A 6210 bearing has a 90 mm outside diameter and a 20 mm width. G = 0.005 × 90 × 20 = 9 g of grease per relubrication. Treat this as a starting point to adjust from measured temperature and condition monitoring, and confirm fill quantities for initial fill against the bearing manufacturer's guidance.
Water exposure is worth recording when you choose this product: resistance to water and corrosion protection are part of what Klüber documents for it. Clean grease fittings before greasing, and keep containers closed between uses, because contamination does more damage to a bearing than most specification differences.
Storage and shelf life
The product information lists a minimum shelf life of approximately 60 months from the date of manufacture, stored unopened in a dry, frost-free place. Rotate stock first in, first out, keep containers sealed until use, and mark receipt dates on cans and cartridges so older stock is used first.
Common questions
Does NBU 12/300 KP contain molybdenum disulfide or other solid lubricants?
The published composition lists a mineral base oil and a barium complex soap thickener. No solid lubricant is listed. If your maintenance standard calls for a grease with documented MoS₂ content, check the current product information or ask Klüber for a product recommendation instead of relying on secondary descriptions.
What does the speed factor mean in practice?
The speed factor n × dm combines rotational speed with bearing pitch diameter. Klüber lists approximately 350,000 mm/min for this grease. As an example, a 6205 bearing has a pitch diameter of about 38.5 mm, so 350,000 ÷ 38.5 gives roughly 9,000 rpm as an order-of-magnitude limit for that bearing size. Larger bearings reach the limit at lower rpm.
Is it suitable for food processing equipment?
Klüber does not document NSF H1 registration for this product. Where incidental contact with food is possible, specify an H1 registered lubricant, for example from the Klüberfood NH1 or Klübersynth UH1 lines, and verify the registration in the current NSF White Book.
How does it differ from Staburags NBU 12 or NBU 8 EP?
Those are separate products in the same family, with their own base oil viscosities, thickener systems and documented applications. Compare the current product information for each product; a shared family name is not a substitution approval.
Order the grease your machine list calls for
Send the exact product name, pack size (400 g cartridge, 1 kg can or 25 kg bucket) and quantity. If you are unsure whether NBU 12/300 KP fits your application, include the bearing type, speed and temperature so we can check the current product information with you.
Manufacturer references
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