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Oil levellers

Oil levellers

Automatic adjustment for optimal lubricating oil level

Lubricating Oil Leveller LAHD series

Oil leveller

SKF Oil Levellers, LAHD 500 and LAHD 1000, are designed for automatic adjustment of the optimal lubricating oil level within a bearing housing, gear box, crank case or similar oil bath lubrication application. Not usually possible, SKF Oil Levellers allow you to effectively adjust the correct lubricating oil level during running conditions, optimising machine performance and increasing the service life of the applications. Furthermore, they automatically compensate for lubricating oil leakage and offer the possibility of visual inspection of the oil level.

How it works

The SKF Oil Leveller consists of two communicating oil reservoirs. The lower reservoir is in direct contact with the application and hence its oil level is the same as the lubricating oil level inside the application. Through a ventilation tube, the lower reservoir is also in direct contact with the ambient air.

The upper reservoir is an airtight container storing replacement oil. Through its extended neck, which dips into the oil of the lower reservoir, the two reservoirs are in direct contact with each other. However, oil can only flow from the upper to the lower reservoir once the oil level in the lower reservoir goes below the pre-set level, allowing air to flow through the extended neck to the upper reservoir.

Optimally maintained oil level provides adequate lubrication

Easy visual inspection

Extended relubrication intervals. LAHD 1000 compensates for evaporation losses of up to 1 litre of lubricating oil!

Oil must be refilled manually


Technical data
LAHD 500 / LAHD 1000
Boundary dimensions
– LAHD 500
Ø 91 mm x 290 mm high (3.6 x 11.4 in.)
– LAHD 1000
Ø 122 mm x 290 mm high (4.8 x 11.4 in.)
Reservoir volume
– LAHD 500
500 ml (17 US fl. oz)
– LAHD 1000
1 000 ml (34 US fl. oz)
Container material
Allowed temperature range
– 20 to 70 °C (-4 to 158 °F)
Permissible humidity
0 – 100 %
Length of connecting tube
600 mm (23.5 in.)
Connection thread
G 1/2
Tube material
O-ring material
NBR – 70 Shore
NBR – 80 Shore 6 pieces
Other material
Aluminum, Bronze, Stainless Steel
Suitable lubricating oil types
Mineral and synthetic oils