Bushings

We offer a broad range of bronze bushings for a variety of applications. Contact us for ... Corrosion-resistant Able to withstand dirty environments...

0 downloads 126 Views 705KB Size
Bushings We offer a broad range of bronze bushings for a variety of applications. Contact us for more information.          

Suitable for demanding applications in harsh environments With or without flange Able to withstand high loads Corrosion-resistant Able to withstand dirty environments Available with or without lubrication Close tolerances Maintenance-free Suitable for applications with rotary movement Suitable for applications with high level of contamination

Examples of materials include: CuSn7ZnPb, CuAl10Fe, CuAl10Ni, CuZn35Al1, CuSn5ZnPb, CuSn10, CuPb15Sn and CuPb10Sn.

Thonab AB | Vretensborgsvägen 28 | SE-126 30 Hägersten | Box 42142, SE-126 15 Stockholm | Sweden Phone +46 8 645 26 70 | [email protected] | www.thonab.se

Steel bushing This bearing is a 3-layer bearing wrapped of steel-sheets with a layer of PTFE/lead. This model is mainly intended for oscillating movements, bearing places with often occurring starts and stops, or when minimal dryfriction is tried to be obtained and when greasing is out of the question. Owing to the fact that the friction is very low. This can be used without additional lubrication. This is resistant to most common mediums. The thin layer which makes up the running surface should be well protected to avoid mounting damages and also protected from heat e.g. welding.

Applications:

- Tail lifts - Person lifts - Hydraulic pumps - Pneumatic cylinders - Textile machines

Special:

- Stainless steel backing - Bronze backing - Layer without lead - Flat or spherical thrust washers - Other positions of tolerance - Drawing details

Benefits:

- Designed to work even without lubrication - Wide range of temperature - High level thermal conductivity - Good resistance to most common mediums. - Wide range of stock hold standard dimensions - Many possible applications

Tech. Data Static

Max. Load

Very low speed Rotating oscillating

Max Pv. dry running

Short-term operation

Continious operation

250N/mm^2 140N/mm^2 60N/mm^2 3.6N/mm2*m/s 1.8N/mm2*m/s

Temp. limit

-195°C~+280°C

Max. speed

2m/s >2m/s

Thermal conductivity

42 W(m*K)^-1

Friction coefficient

0,03~,02

____________________________________________________________________________________________________________________________________________ Thonab AB | Vretensborgsvägen 28 | SE-126 30 Hägersten | Box 42142, SE-126 15 Stockholm | Sweden Phone +46 8 645 26 70 | [email protected] | www.thonab.se

Self-lubricated composite bushing This bushing is a 3-layer bearing, wrapped of steel-sheets with a layer of POM. The standard bearing is fitted with lubrication indents on the running surface. These lubrication indents serve as lubrication reservoirs and are aimed to be filled with grease before mounting the shaft. This model is a boundary lubricated bearing which is especially suitable for constructions, where medium loads and relatively slow rotating or oscillating movements are occurring. The thin layer, which constitute the running surface of the bearing, ought to be well protected to avoid mounting damages and also for heating from e.g. welding. Additional lubrication ought to be done through the shafts or radial through the housings. All customary greases can be used, but greases with additives of graphite or molybdenum-disulphide must be avoided. This model need in most of cases very little additional lubrication.

Benefits:

- Suitable for rotating and oscillating movements. - Can be used where effective lubrication does not exist. - Low friction even without lubrication. - Good resistance to most common mediums. - Wide range of stock hold standard dimensions. - Many possible applications.

Special:

- Stainless steel backing. - Bronze backing. - Without lubrication indents. - Flat or spherical thrust washers. - Other positions of tolerance. - Drawing details.

Applications:

- Hydraulic cranes. - Tail lifts. - Textile machines. - Hydraulic cylinders. - Pneumatic cylinders. - Agricultural machines.

Tech. Data Max. load

Static Very low speed Rotating oscillating

Coefficient of thermal expansion

250N/mm^2 140N/mm^2 70N/mm^2 11*10^-6*K^-1

Temp. limit Pre-lubricated Oiling continuous Thermal conductivity Friction coefficient Max speed

-40° C~ +110° C 2m/s >2m/s 4W(M*K)^-1 0.05~0.20

____________________________________________________________________________________________________________________________________________ Thonab AB | Vretensborgsvägen 28 | SE-126 30 Hägersten | Box 42142, SE-126 15 Stockholm | Sweden Phone +46 8 645 26 70 | [email protected] | www.thonab.se

Cast Bronze with graphite inserts This bearing with or without flange are made of casted bronze material with special embedded solid lubricant. The base metal is aimed for high loads and the solid lubricant makes it possible to use B50 bearings without additional lubrication. This models show excellent performance without lubrication under conditions of low speeds and extreme high or low temperatures. The lubrication reservoirs are dispersed in a special way over the bearing surface, therefore the whole bearing surface is lubricated when the movement occurs. These lubrication reservoirs cover about 25-30% of the sliding surface. Both the base material and the solid lubricant can be fitted to special needs to achieve the most suitable solution for the application in question.

BENEFITS:

Extremely high load capacity. May be used without additional lubrication. Excellent for constructions with low speeds and high loads. Suitable for reciprocating, oscillating or intermittent movement. Wide range of temperature. Good chemical resistance. Excellent corrosion resistance.

SPECIAL:

Thrust washers, plates, bars. Drawing details. Several alternative lubricant materials. Several alternative base materials.

APPLICATIONS:

Casting machines. Steel rollers. Metallurgic industry. Ships. Turbins. Ship cranes.

Tech. Data Material

Composition %

M1

Cu Sn Pb Zn Ni Al Fe Mn

Density Yield pont N/mm^2 Tensile strength n/mm^2 Elongation strength n/mm^2 Elongation % Limit Temp. °C

M2 65

25

M3 85 5 5 5

M5 88 12

M6 80 10 10

8.8 >90 >250 >15 >70 400

M7 65

76 8 15

25 5 10 5

6 4 8.0 >350 >750 >12 >210 300

M4 80

7.6 >260 >500 >10 >150 400

1 6

8.8 >150 >270 >5 >95 400

8.9 >100 >210 >8 >75 250

4 8.0 >450 >800 >8 >250 400

9.1 >80 >180 >8 >60 250

____________________________________________________________________________________________________________________________________________ Thonab AB | Vretensborgsvägen 28 | SE-126 30 Hägersten | Box 42142, SE-126 15 Stockholm | Sweden Phone +46 8 645 26 70 | [email protected] | www.thonab.se

Bronze turned bearings Turned bearings are often technically and economically favorable bearing solutions. They are being turned from centrifugal casted semi-finished products. High load capability, low weight, good corrosion resistance and small radial diameters are some good properties for turned bearings.

Material:

Turned bearings and bearing elements can be manufactured in several copper alloys. The material will be chosen to meet the specific needs for each construction. This is important to reach the optimal performance for the life time, service and total cost.

TOLERANCES:

Turned bearings can be manufactured with tighter tolerances than wrapped thin walled bearings. The tolerance can be adapted to the needs of the construction. Therefore it is possible to reach the clearance which is wanted.

DESIGN:

Turned bearings are always manufactured according to customer drawings. Therefore the bearing can be designed to meet the needs of the specific construction. The design of lubrication grooves, quantity of the lubrication holes, tolerances and chamfering can be manufactured according to customer needs.

LUBRICATION:

Turned bearings from copper alloys are aimed to be additionally lubricated. The need of the additional lubrication depends on the bearing material and the general conditions of the bearing solution. The design of the lubrication grooves, the choice of the lubricate and the general conditions of the bearing solution affect how the additional lubrication should be arranged. With the right material and design can also turned bearings be used with quite a long lubrication intervals.

Tech. Data

Material

Composition %

Cu Sn Pb Zn Ni Al Fe Mn

Density Yield pont N/mm^2 Tensile strength n/mm^2 Elongation % Hardness HB Limit Temp. °C

60 M1 65

25

60 M2 85 5 5 5

60 M4 88 12

60 M5 80 10 10

8.8 >90 >250 >15 >70 400

60 M6 65

60 M7 76 8 15

25 5 10 5

6 4 8.0 >350 >750 >12 >210 300

60 M3 80

7.6 >260 >500 >10 >150 400

1 6

8.8 >150 >270 >5 >95 400

8.9 >100 >210 >8 >75 250

4 8.0 >450 >800 >8 >250 400

9.1 >80 >180 >8 >60 250

____________________________________________________________________________________________________________________________________________ Thonab AB | Vretensborgsvägen 28 | SE-126 30 Hägersten | Box 42142, SE-126 15 Stockholm | Sweden Phone +46 8 645 26 70 | [email protected] | www.thonab.se

Bronze self-lubricated porous bearings Structure The base material for sintered parts such as sliding bearings or other formed parts are iron, bronze, iron with bronze and other metal in powder form. This powder is formed under high pressure in dies into a temperature which is just below the melting point. According to the work condition, the bearings can impregnated different oil or solid lubricants for the self-lubricating. Sintered self-lubricating bearings are the ideal and economical solution for applications where lubrication is difficult or cannot be given.

The Self - lubricating Bronze Bearings made from sintered powders, offer: Safety: · Elimination of the risk of seizure · Permanent lubrication film · 20 to 30% of the volume is oil impregnated · Quiet function · Low friction coefficient

Economy:

· Elimination of lubricators · Maintenance-free · Permanent stock

Technology:

· Very high precision · Loads up to 200 Kg./cm2 · Speeds up to 30.000 r.p.m. · Temperatures from -20°C to +120°C

Impregnation oil:

· ISO-VG-68 viscosity paraffinic mineral oil Allowable load · PV = 2,5MPa*m/s It is also possible to manufacture bearings with different sizes, materials and lubricants than those indicated in this catalogue.

Application of Self - lubricating bearings:

Sewing machines, locks, fans, electric watches, washing machines agitators - water pumps, garage doors, portable machine tools, machinery for wood, bottling machinery, gardening machines, toys, shaving machines, high and low power electrical motors, automotive equipment such as alternators, service break pedals, door-hines, speed counters, windscreen wiper-motors, heating motors, etc.

____________________________________________________________________________________________________________________________________________ Thonab AB | Vretensborgsvägen 28 | SE-126 30 Hägersten | Box 42142, SE-126 15 Stockholm | Sweden Phone +46 8 645 26 70 | [email protected] | www.thonab.se

Wrapped bushes with grease pockets This bushing with or with our flange are intended for radial axial movements. The bearings are manufactured of a cold formable homogenous bronze, which because of this will obtain exceptional material properties. The execution of the flange permits that the bearing also can carry axial loads. The standard sizes are fitted with diamond-shaped lubrication indents on the bearing surface. These indents serve as lubricant reservoirs i.a. to rapidly build up a lubrication film in the movement of start and therewith reduce the start friction The material of this model, together with the procedure of wrapping and calibration, make this type of bearing especially suitable for constructions, where medium or high loads and relatively slow movements are occurring.

BENEFITS:

High load capacity. Can be used in difficult circumstances. Good lubrication properties due to lubrication indents. High level thermal conductivity. Wide range of stock hold standard dimensions.

SPECIAL:

Spherical shaped lubrication indents. In or outside lubrication grooves. Without lubrication indents. Hardness 150 160 HB. Other positions of tolerance. Flat or spherical thrust washers.

TYPICAL APPLICATIONS: Forklift trucks Forest cranes Hydraulic table lifts Agriculture machines Winches

Chemical compositions Material type Cu% FB090 91,3

Sn% 8,5

P% 0,2

Pb% -

Zn% -

Tech. Data Max. load

Static Dynami

Max. Speed Max. PV Tensile strength Yield point

120N/mm^2 40N/mm^2 2m/s 2,8N/mm^2m/ 450N/mm^2 250N/mm^2

Hardness Elongation Temp. Friction coefficient Thermal conductivity Coef. of thermal expansion

HB-110-150 40% -100°C ~ +200°C 0,08~0,25 60W(m*K)^-1 15*10^-6k^-1

____________________________________________________________________________________________________________________________________________ Thonab AB | Vretensborgsvägen 28 | SE-126 30 Hägersten | Box 42142, SE-126 15 Stockholm | Sweden Phone +46 8 645 26 70 | [email protected] | www.thonab.se

Bronze wrapped bushing with holes This bushing with or without flange are intended for radial and axial movements. The bearings are wrapped of a cold formable homogenous bronze, which because of this will obtain exceptional material properties. The execution of the flange permits that the bearing also can carry axial loads. The standard sizes are fitted with holes, which are dispersed in a special way over the whole bearing - surface. These holes serve as lubricant reservoirs i.a. to rapidly build up a lubrication film in the moment of start and therewith reduce the start friction. These holes even lengthen significantly the lubrication intervals. The properties of the B92 material, together with the procedure of wrapping and calibration, make this type of bearing especially suitable for constructions, where high loads and relatively slow movements are occurring.

BENEFITS:

High load capacity. Can be used in difficult circumstances. Excellent lubrication properties due to lubrication holes. High level thermal conductivity. Wide range of stock hold standard dimensions. Extended lubrication intervals with 6-8 times compared with traditional slide bearings.

SPECIAL:

Other positions of tolerance. In or outside lubrication grooves. Hardness 150 160 HB. With built in seals. Drawing details.

TYPICAL APPLICATIONS: Forest machines. Agricultural machines. Forklift trucks. Dumpers. Hydraulic cranes. Truck platform constructions.

Chemical compositions Material type Cu% FB090 91,3

Sn% 8,5

P% 0,2

Pb% -

Zn% -

Tech. Data Max. load

Static Dynami

Max. Speed Max. PV Tensile strength Yield point

120N/mm^2 40N/mm^2 2m/s 2,8N/mm^2m/ 450N/mm^2 250N/mm^2

Hardness Elongation Temp. Friction coefficient Thermal conductivity Coef. of thermal expansion

HB-110-150 40% -100°C ~ +200°C 0,08~0,25 60W(m*K)^-1 15*10^-6k^-1

____________________________________________________________________________________________________________________________________________ Thonab AB | Vretensborgsvägen 28 | SE-126 30 Hägersten | Box 42142, SE-126 15 Stockholm | Sweden Phone +46 8 645 26 70 | [email protected] | www.thonab.se