Page 1009 - Rollingbearings

Customized bearings
2 Simple replacement With many variants, all surfaces of the
The boundary dimensions are the same as bearing and, where applicable, shields and In addition to high temperature bearings
those of standard bearings lingers are manganese phosphate coated to corresponding to ISO standards, SKF offers
enhance adhesion of the lubricant to the an assortment of customized high tempera-
3 Operating temperature up to 350 °C metal and provide some protection against ture bearings (ig. 5, page 1008).
(660 °F) corrosion. These bearings are customized for use in
The internal radial clearance and the applications such as:
lubricant are optimized for operation at Typical applications
high temperatures • automatic wafer baking ovens in the food
• metals industry (cooling beds, roller and beverage industry
4 Protection against solid contamination tables, furnaces) • industrial furnaces
– Shields (designation sufix 2Z) protect • food and beverage industry (continuous • chains
the deep groove ball bearing. baking ovens, wafer baking ovens)
– Shields and lingers (designation sufix • automotive industry (paint lines, heat For additional information, contact SKF.
2F) protect the insert bearing. treatment ovens)
• glass industry (glass tableware or lat glass
5 Improved running in manufacturing processes)
The entire bearing surface is manganese • construction industry (tiles, mineral wool
phosphate coated. manufacturing)

Lubrication solutions Assortment 18

SKF high temperature bearing designs and The SKF standard assortment of high tem-
variants incorporate various graphite-based perature bearings and bearing units corre-
lubrication solutions, including: sponding to ISO standards includes:

• lubricating paste composed of a poly- • Deep groove ball bearings (ig. 2)
alkylene glycol/graphite mixture • Insert bearings (Y-bearings, ig. 3)
• graphite cages (segmented or coronet) • Ball bearing units (ig. 4,
skf.com/go/17000-18)
For an overview of lubricant types, and other – Zinc chromate plummer block units
characteristics, for high temperature deep – Zinc chromate square langed units
groove ball bearings and insert bearings, – Zinc chromate oval langed units
refer to table 1, page 1009, and table 2,
page 1010. The assortment includes variants that con-
During operation, the graphite maintains tain food-grade lubricants registered by NSF
a very thin ilm on the bearing’s raceways as category H1 (lubricant acceptable with
and rolling elements to reduce wear signii- incidental food contact, for use in and around
cantly. Graphite ages at a much higher tem- food processing areas). The NSF registration
perature than oil and grease, and therefore conirms the lubricant fulils the requirements
does not lose its lubricating properties at the listed in the US Food and Drug Administra-
high temperatures at which it is recom- tion’s guidelines under 21 CFR section
mended for use, so the need for relubrication 178.3570.
is eliminated.

Fig. 2 Fig. 3 Fig. 4
Deep groove ball bearing Insert bearing Ball bearing unit

1007