Flange housing

European standard

Foodsafe

PSF series

Caution, prices written into the "€" column are your discount prices (if you are connected), or the general public prices (if you are not).

 

Catalog » Bearing And Ball Bearing Units NSK » Silver-Lube ® anti-corrosion housing » Flange housing, PSF series

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The last letter of the code (N or R) corresponds to the manufacturer identification.

 

4-hole PSF series
Code Stk € Discount
code		 Dimensions (mm)
Shaft
Ø 		A A1 A4 J L G
PSF20CRR
07 20 27.8 36.3 13.4 63.5 86.5 M10
PSF25CRR
07 25 27.9 36.7 14.3 70.0 95.0 M10
PSF30CRR
07 30 31.5 41.4 14.3 83.0 107.5 M10
PSF35CRR
07 35 34.8 46.9 15.5 92.0 117.5 M12
PSF40CRR
07 40 37.5 53.2 17.1 102 130.5 M12

 

 

CORROSION RESISTANT
STAINLESS STEEL BEARING HOUSINGS

EFFICIENT IMPERMEABILITY

GREASE COMPLIANT WITH USDA H1 FOOD SAFETY STANDARD

WIDE RANGE OF USAGE TEMPERATURES

PROTECTORS AVAILABLE

 

Moulded thermoplastic body:

 - no coating,
 - no cracking,
 - no flaking.

 

Supports frequent, abundant washing
and is resistant to:

 - corrosion,
 - detergents,
 - chemicals,
 - mould.

 

Stainless steel:

 - oilers,
 - fastener hole insert,
 - socket screws,
 - flingers,
 - impermeability core,
 - bearing rings, cage and balls.

 

 

Composition of the Silver-Lube housing body

 

Silver-Lube housing bodies are made of Valox® 420, a polyester thermoplastic resin, charged 30% with high-quality fibreglass, excellent solidity, rigidity, shape stability and chemical resistance.

 

Hygiene

Silver-Lube housing bodies are corrosion resistant, without any paint or coating to avoid flaking. The extremely smooth surfaces are resistant to dust, mould and bacteria, making Silver-Lube housings ideal products for industries where cleanliness is vital.

 

During tests as per the ASTM G21-70 standard, Valox® resin proved resistant to the following types of mould:

 - Aspergillus niger,
 -  Penicillium faneculosium,
 -  Chaetomium globosum,
 -  Giiocladium virens,
 -  Aureobasidium pullulans.

 

Characteristic properties of VALOX® 420 Units

ASTM
testing
method

VALOX®420
PBT resin reinforced
with 30% fibreglass
Mechanical
Traction resistance Mpa D638 119
Stretch at break % D638 3
Flexural resistance Mpa D790 189
Modulus in flexure Mpa D790 7600
Compression resistance Mpa D695 124
Shearing resistance Mpa D732 61
Izod impact resistance
      Notched 3.2 mm test piece
      Smooth 3.2 mm test piece 		 
J/m
J/m		 D256
 
 		  
85
800
Gardner impact resistance 3.2 mm J    
Rockwell R scale hardness   D785 118
Physical
Density   D792 1,53
Reciprocal density cm³/kg D792 655
Water absorption in 24 hours % D570 0,06

 

 

Heat resistance

Operating temperature: -20° to +90°C.

To assess the resistance of housing bodies, it is important to establish the operating temperature of the housing rather than simply the ambient temperature, the housing load and the speed of the parts it holds.

When this speed is high, the operating temperature often exceeds60°C.

 

Chemical resistance

Generally speaking, Silver-Lube housing bodies have excellent resistance to a wide range of chemical products.

 

Behaviour of housing bodies in contact with categories of chemicals

Category of chemical Resistance
Acids Excellent
Bases Good to Limited
Organic solvents Excellent to acceptable
Ketone and Ester Acceptable to Limited
Chlorinated solvents Excellent to limited
Salts Excellent
Automobile products Excellent to acceptable

 

 

Tests on the Valox® 420 resin in various milieux

Milieus Days'
immersion		 Temp. °C % Milieux Days'
immersion		 Temp. °C %
Acids Organic solvents
10% hydrochloric acid 30 25 89 Ethanol 30 25 99
90 85 90 96
10% sulphuric acid 30 25 97 Methanol 30 25 91
90 94 90 82
36% sulphuric acid 30 25 97 Isopropanol 30 25 100
90 97 90 100
36% acetic acid 30 60 84 Isopropanol + water (50/50) 30 25 98
90 60 90 97
10% acetic acid 30 25 88 Misc. / Automobile
90 88 Heptane 30 25 99
Bases 90 25 99
5% potassium 30 25 88 Acetone 30   86
90 10 90   74
10% soda 30 25 XX Methyl ethyl ketone 30 25 90
90 XX 90 80
10% ammonia 30 25 96 Ethyl acetate 30 25 96
90 87 90 86
Sels Methylene chloride 30 25 54
10% zinc chloride 30 25 97 90 54
90 94 Glycol 30 25 100
10% calcium chloride 30 25 98 90 100
90 98 Engine oil 30 25 100
5% sodium chloride 30 25 97 90 100
90   97 Engine oil 30 121 96
        90 63
XX = brittle.

 

This data does not take into account the behaviour of Silver-Lube housings in contact with a combination of products or special environments such as higher pressure or temperatures.

All this data is expressed in terms of a resistance retention percentage.

 

 

Water and steam resistance

Silver-Lube housing bodies are specially designed for frequent, abundant washing. If continuously immersed, they retain 95% of their resistance up to 65°C. They can nonetheless withstand higher temperatures without any difficulty, if intermittent.

 

Ultraviolet resistance

Natural colour Valox®420-1001 resin was subjected to ageing tests under ultraviolet light, consisting of direct exposure to sunlight in Florida and Arizona for 5 years.

Following these tests, the resin retained 75% of its original resistance and flexibility.

 

Housing body solidity

The maximum load capacities recommended in the tables below are understood to apply to normal conditions of use. In the event of exposure to an aggressive or weakening environment, these theoretical values should be reduced accordingly.

To optimise the load capacity, washers should be used for fastening housings and the maximum bolt tightening torques adhered to (the values indicated in the PSF table remain valid for PSFTs and PNPs).

 

 

Maximum load for bodies at 20°C
Code F1 F2
Interm. Perm. Cycl. Interm. Perm. Cycl.
PSF20CRR 3100 1600 900 1300 700 400
PSF25CRR 3500 1700 1000 1300 700 400
PSF30CRR 4600 2300 1300 2200 1100 600
PSF35CRR 6200 3100 1700 2600 1300 700
PSF40CRR 6200 3100 1700 4000 2000 1000

 

série PSF

 

série PSFT
Maximum load for bodies at 20°C
Code T1 T2 T3
Interm. Perm. Cycl. Interm. Perm. Cycl. Interm. Perm. Cycl.
PSFT20CRR 4400 2200 1200 1900 900 500 1300 700 400
PSFT25CRR 4400 2200 1200 3000 1500 800 1400 700 400
PSFT30CRR 5900 2900 1600 3300 1600 900 2000 1000 500
PSFT35CRR 6400 3200 1700 3900 200 1100 2800 1400 800
PSFT40CRR 9000 4500 2500 3900 2000 1100 3300 1600 900

 

 

Maximum load for bodies at 20°C
Code P1 P2 P3 P4
Interm. Perm. Cycl. Interm. Perm. Cycl. Interm. Perm. Cycl. Interm. Perm. Cycl.
PNP20CRR 3500 1700 800 2800 1400 800 2600 1300 700 1300 700 400
PNP25CRR 4000 2000 1000 3100 1500 800 2600 1300 700 1700 900 500
PNP30CRR 5000 2500 1200 3500 1800 1000 4000 2000 1100 2600 1300 700
PNP35CRR 6000 3000 1500 4300 2100 1200 4100 2100 1100 3200 1600 900
PNP40CRR 10700 5300 2900 8000 R)d 4000 2200 6800 3400 1900 5200 2600 1400

 

série PNP

 

Silver-Lube housing bearings

Bearings are made of QD51, a modified type 440C stainless steel, and filled with Chevron Poly FM2, a grease compliant with the USDA H1 food safety standard.

They can operate continuously from -20 to +90°C.

 

Dimensions

Silver-Lube housings are interchangeable with those in the traditional Self-Lube® RHP range. However, certain non-critical dimensions are different.

Roulements

 

 

 

 

Technical drawing of bearing