HP Bearings - Greene Tweed
Product Brochure HP Bearings High-Performance Thermoplastic Bearings Specialty Designs Greene Tweed has developed a unique range of thermoplastic bearing materials that provide excellent tribological properties. Our bearings are machined to ensure ease of assembly, protect against particle contaminants, and provide cost-effective bearing solutions while withstanding temperatures up to 500 F (260 C). In addition, our bearings: Reduce build-up of tolerances with inherent reduced eccentricity and run out Closely control hardware interfaces Provide minimal static and dynamic friction Provide nonaggressive materials when running against mating hardware surfaces HP Bearing Features and Benefits High load bearing capacities allow for superior performance in demanding conditions Low friction helps maintain consistent squeeze levels of seal components Contaminant-resistant materials prevent particles from reaching critical systems Excellent chemical resistance prevents material degradation in harsh substances Specialty designs to suit customer specifications Contact Us Greene Tweed Kulpsville, PA, USA Tel: 0 1.215.256.9521 Fax:0 1.215.256.0189 Statements and recommendations in this publication are based on our experience and knowledge of typical applications of this product and shall not constitute a guarantee of performance nor modify or alter our standard warranty applicable to such products. 2018, Greene Tweed all rights reserved. All trademarks are property of their respective owners. 09/18-GT DS-US-AS-037 www.gtweed.com
Hardware Designs (Typical) Hardware Design (in inches) Bearing CrossSection Rod Bearing Rod Piston Y Dia. Z* Dia. X Dia. Groove Corner Length Radius (L) Z* Dia. A 1/32 in. X Dia. 0.064 X Dia. 0.015 Y Dia. -0.064 Y Dia. -0.015 B 1/16 in. X Dia. 0.126 X Dia. 0.015 Y Dia. -0.126 Y Dia. -0.015 C 3/32 in. X Dia. 0.188 X Dia. 0.015 Y Dia. -0.188 Y Dia. -0.015 D X Dia. 0.250 X Dia. 0.017 Y Dia. -0.250 Y Dia. -0.017 E 5/32 in. X Dia. 0.314 X Dia. 0.017 Y Dia. -0.314 Y Dia. -0.017 F 3/16 in. X Dia. 0.376 X Dia. 0.017 Y Dia. -0.376 Y Dia. -0.017 G 7/32 in. X Dia. 0.438 X Dia. 0.017 Y Dia. -0.438 Y Dia. -0.017 H X Dia. 0.017 Y Dia. -0.500 Y Dia. -0.017 Piston Bearing 1/8 in. Flange Bearing 1/4 in. X Dia. 0.500 Bearing Length 0.010/ 0.020 Bearing Length 0.010/ 0.020 Bearing Length 0.010/ 0.020 Bearing Length 0.010/ 0.020 Bearing Length 0.010/ 0.020 Bearing Length 0.010/ 0.020 Bearing Length 0.010/ 0.020 Bearing Length 0.010/ 0.020 0.005/ 0.015 0.005/ 0.015 0.005/ 0.015 0.010/ 0.025 0.010/ 0.025 0.020/ 0.035 0.020/ 0.035 0.020/ 0.035 *The clearance gap could affect other seal assemblies. Contact Greene Tweed engineering for specific information. Note: For rod flange bearings please refer to Greene Tweed engineering. Contact Us Greene Tweed Kulpsville, PA, USA Tel: 0 1.215.256.9521 Fax:0 1.215.256.0189 Statements and recommendations in this publication are based on our experience and knowledge of typical applications of this product and shall not constitute a guarantee of performance nor modify or alter our standard warranty applicable to such products. 2018, Greene Tweed all rights reserved. All trademarks are property of their respective owners. 09/18-GT DS-US-AS-037 www.gtweed.com
Plastic Bearing Types Design Considerations Split bearings are recommended to minimize the potential undesirable effects at extreme temperatures. Most materials tend to expand as temperature increases and contract as temperature decreases. The dimensional changes caused by thermal expansion will affect the performance of plastic bearings. At high temperature, the bearing cross-section may grow to the point of having interference fit, causing excessive wear and friction. At cryogenic temperatures, the bearings will shrink, tightening around the shaft and causing increased friction. When choosing the correct bearing material, wear, friction requirements, load bearing capacity, temperature, pressure, and running velocity all must be considered. The most common choice of Arlon grades is Arlon 1555 (035 code). Greene Tweed’s standard recommendation for Avalon PTFEs would be our Avalon 69, a thermoplastic and carbon-filled PTFE compound (079 code). We recommend that a range of materials is tested as the performance limits given are based on ideal operating conditions and an independent test of each factor. Unknown parameters or operating conditions could limit the validity of these performance limits. Specific material compatibility should be evaluated on each application. The use of solid bearings is only recommended in cases where press-fit is the only way to install and contain the bearing in place. Contact Greene Tweed engineering for more information. Split Bearing As a general guide, consider the following: If wear and load bearing capability is paramount, consider Arlon materials. If friction is paramount, consider Avalon materials. Selecting the Appropriate Bearing Flange Bearing To select the appropriate bearing a number of criteria must be established. The following questions should be considered when selecting the appropriate materials with Greene Tweed engineering. Is this a rotary, static, oscillating, or reciprocating application? What velocity and lubrication will be present? What are the desired temperature and load requirements? What are the shaft material, surface finish, and hardness? Is the bearing exposed to abrasive, erosive, or chemically aggressive conditions? Thrust Bearing Contact Us Greene Tweed Kulpsville, PA, USA Tel: 0 1.215.256.9521 Fax:0 1.215.256.0189 Statements and recommendations in this publication are based on our experience and knowledge of typical applications of this product and shall not constitute a guarantee of performance nor modify or alter our standard warranty applicable to such products. 2018, Greene Tweed all rights reserved. All trademarks are property of their respective owners. 09/18-GT DS-US-AS-037 www.gtweed.com
Load Capacity Determining Axial Length of the Bearing An estimated load requirement can be made using a calculation based on the failure load of the weakest dynamic member. Bearing load depends on factors such as diametrical tolerances, rod deflection, and bearing deformation. Direct external loads and other forces, such as the weight of the component, nonconcentric axial loads, and rod deflection, must be considered. 1. D etermine the maximum total load to be supported by the bearing. 2. Calculate the projected bearing area by multiplying the bearing diameter by an initial axial length. 3. Divide the total load by the projected area to arrive at the application compressive stress (also called load bearing pressure). The required compressive strength (see Greene Tweed typical properties sheet for these values) is calculated by multiplying the compressive stress by a factor of safety (see “Material Selection and Design Validation” for more information.) 4. Modify the axial length accordingly to result in a required compressive strength that will not exceed the candidate materials available compressive strength. It is important to maintain the lowest possible unit load on the bearing. We assume that the load distribution is constant over the projected bearing area. The projected area is a function of the bearing contact diameter and the axial length whereby: Bearing Area (A) in.2 Bearing Inside Contact Diameter (d) in. x Bearing Length (b) in. Once the force-load requirement and the projected bearing area is determined the overall unit load can be calculated by dividing the total force load by the projected area. This gives the compressive stress or load bearing pressure in psi required in the application. The load bearing pressure calculation is: Bearing Design P F/A F/(d x b), where: P Load bearing pressure (compressive stress required) (psi) F Overall force load (Normal force) (lb) A Projected bearing area (in.2) (refer to the above “Bearing Area” calculation) d Bearing inside contact diameter (in.) b Bearing axial length (in.) Contact Us Greene Tweed Kulpsville, PA, USA Tel: 0 1.215.256.9521 Fax:0 1.215.256.0189 Material Selection and Design Validation Once the application’s bearing pressure is calculated, a Greene Tweed bearing material can be selected that exceeds the stress requirements. We recommend an FS (Factor of Safety) of 2 to 3 in design. This FS takes into account the creep and deformation under load characteristics of plastic materials and also accounts for the design “unknowns.” When referring to the typical properties sheet for the materials listed in the Material Designator Tables, determine if the materials have a compressive strength in excess of the safety stress calculated above. If the required load exceeds the capability of the available materials then the projected bearing area in design should be increased, if possible. This is accomplished by increasing the axial length of the bearing as defined in number 3 of the “Determining Axial Length of the Bearing” section (above). Reiterate the calculations until the required safety load falls within the capacity of the suggested materials. Statements and recommendations in this publication are based on our experience and knowledge of typical applications of this product and shall not constitute a guarantee of performance nor modify or alter our standard warranty applicable to such products. 2018, Greene Tweed all rights reserved. All trademarks are property of their respective owners. 09/18-GT DS-US-AS-037 www.gtweed.com
Bearing PV Limits Example Application Review Dynamic applications require tribological properties that resist wear and the negative effects of frictional heat. Having oil film lubrication, in the absence of particle contamination, will prolong the life of a dynamic load bearing system. In design, “worst case” wear conditions are considered by determining the effect of running surface speed for a given load bearing pressure. This relationship is referred to as the “PV” limits of a material, assuming “dry” conditions. Calculation of the required PV is recommended for rotary applications and thrust bearings. The values calculated are intended to provide the user with an estimate of the dynamic load capacity of the bearing before practical testing and direct utilization have begun. The operational limits can be defined by PV as: The ability to support a load is directly proportional to the surface area. Improperly designed bearings will result in premature seal failure and possible hardware damage. Below is a calculation to determine the load bearing pressure that will indicate which materials are applicable. Velocity is a critical design factor that should be considered during the selection process using PV values. Proper Bearing Design PV Load Bearing Pressure (psi) x Velocity (ft/min.) The surface speed or running velocity can be calculated as follows: For rotary applications, V (d x π x n)/12 For reciprocating applications, V (LS x C x 2)/12 For thrust bearings, V (0.52 x n)(0.6r1 0.4r2) Where: V Velocity ft/min. d Bearing inside diameter (inches) LS Length of stroke (inches) C Cycles per minute (extend & retract) r1 Radius of the thrust bearing ID (inches) r2 Radius of the thrust bearing OD (inches) n RPM Example (Rotary Application) F 255 lb n 600 rpm d 0.750 in. b 0.875 in. A d x b 0.750 x 0.875 0.656 in.2 P F/A 255/0.656 389 psi Required compressive strength of material P x Factor of Safety 389 x 2 778 psi Velocity V (n x d x π) /12 (600 x 0.750 x π) /12 118 fpm PV Value, P x V 778 x 118 45900 psi.fpm Bearing Media The Avalon bearings have almost unlimited chemical compatibility. Thermoplastic and composite bearings have wide chemical compatibility, except for use with acids and strong oxidizing agents. Bearing Lubrication PTFE bearings are designed to run without any lubrication; however, lubricated bearings will exhibit lower coefficient of friction and longer life. Contact Us Greene Tweed Kulpsville, PA, USA Tel: 0 1.215.256.9521 Fax:0 1.215.256.0189 Statements and recommendations in this publication are based on our experience and knowledge of typical applications of this product and shall not constitute a guarantee of performance nor modify or alter our standard warranty applicable to such products. 2018, Greene Tweed all rights reserved. All trademarks are property of their respective owners. 09/18-GT DS-US-AS-037 www.gtweed.com
HP Bearing Part Numbering System Material Designator Tables The part numbering system requires the use of the material designator tables found in the next column. For nonstandard designs, contact Greene Tweed engineering. 2 7 2 7 X X X X X X X X X X X X X X X X X X X X XBearing material X X X X X Bearing Diameter (in.) Length (in.) series to 3 decimal designator 01 1/16 Bearing Length (in.) 02 2/16Bearing places x 1000 R Rod Diameter (in.) (1/8) material series to 3 decimal designator 01 1/16 P Piston – Standard 03 3/16 places x 1000 R Rod Maximum 02 Rod 2/16 04 (1/8) 4/16 (1/4) A–Z Nonstandard Cross diameter for P Piston – Standard 03 3/16 Section (in.) Rod 05 5/16 Maximum rod bearings Cross A–Z (3/8) Nonstandard 04 4/1606 (1/4) 6/16 A 1/32 for Section (in.) Bdiameter 05 5/16 1/16 rod bearingsMinimum bore 07 7/16 A 1/32 C 3/32 06 for 6/1608 (3/8) 8/16 (1/2) diameter B 1/16 DMinimum 7/1609 9/16 piston07 bearings 1/8 bore C 3/32 Ediameter 08 8/1610 (1/2) 10/16 (5/8) 5/32 for D 1/8 F piston 3/16bearings 09 9/1611 11/16 E 5/32 G 7/32 10 10/16 12(5/8) 12/16 (3/4) F 3/16 H 1/4 11 11/16 13 13/16 G 7/32 12 12/16 (3/4) 14 14/16 (7/8) H 1/4 13 13/16 15 15/16 14 14/16 16(7/8) 16/16 (1) 15 15/16 16 16/16 (1) 99 99/16 (63/16) 99 99/16 (63/16) Part Numbering Examples Part Numbering Examples 2 7 2 7 R A 0 0 9 9 8 0 2 0 3 5 – 0 0 9 9 8 0 3 5 R A Rod 0.998 in.0 2 2/16 – in. (1/8 in.) Arlon 1555, maximum length Split Rod 0.998 in. Rod 2/16 in. (1/8 in.) Arlon 1555, maximum diameter length Split Standard 1/32 Rodin. Cross-section diameter Standard 1/32 in. Cross-section 2 7 2 7 P D 0 3 9 9 3 3 in.0 5 P DPiston0 3 9 93.993 minimum Piston 3.993 in. Bore 5/16 in. minimum length diameter 1/8 in. Bore Cross-section diameter 1/8 in. Cross-section Arlon Proprietary GT Reinforced PEEK (Polyetheretherketone) Materials Arlon Proprietary GT Reinforced PEEK (Polyetheretherketone) Materials Code Material Name Code 411 Material Name Arlon 1261 411 190 Arlon 1261 Arlon 1263 190 193 Arlon 1263 Arlon 1286 193 038 Arlon 1286 Arlon 1330 038 035 Arlon 1330 Arlon 1555 035 410 Arlon 1555 Arlon 1580 410 Arlon 1580 Avalon Proprietary GT Reinforced PTFE (Polytetrafluoroethylene) Materials Avalon Proprietary GT Reinforced PTFE Code Material (Polytetrafluoroethylene) Materials Name Code 001 Material Name Avalon 01 001 042 Avalon 01Avalon 07 042 044 Avalon 07Avalon 44 044 073 Avalon 44Avalon 50 073 057 Avalon 50Avalon 57 057 079 Avalon 57Avalon 69 079 089 Avalon 69Avalon 89 089 Avalon 89 More information on the above materials can be found in the Thermoplastics section in Capabilities. 0 7 9 0 5 – – in. 0 7 9 Avalon 69 5/16 See Greene Tweed Surface Finish guidelines. length Avalon 69 Standard Standard Contact your local Greene Tweed representative for specific recommendations to suit higher performance requirements. Contact Us Greene Tweed Kulpsville, PA, USA Tel: 0 1.215.256.9521 Fax:0 1.215.256.0189 Statements and recommendations in this publication are based on our experience and knowledge of typical applications of this product and shall not constitute a guarantee of performance nor modify or alter our standard warranty applicable to such products. 2018, Greene Tweed all rights reserved. All trademarks are property of their respective owners. 09/18-GT DS-US-AS-037 www.gtweed.com
Greene Tweed Kulpsville, PA, USA Tel: 1.215.256.9521 1.215.256.0189 Hardware Design (in inches) *The clearance gap could affect other seal assemblies. Contact Greene Tweed engineering for specific information. Rod Bearing Piston Bearing Flange Bearing Bearing Cross-Section Rod PistonG roove Length (L) Corner Radius YD ia. Z* Dia. X Dia. A Z .
Greene 2 Craig Hege AUDITOR (6 Yr.) 1 Greene 2 Cynthia Tobin AUDITOR (6 Yr.) 1 Greene 2 David Green AUDITOR (6 Yr.) 1 Greene 2 Deez Nuts AUDITOR (6 Yr.) 1 Greene 2 Derek Thomson AUDITOR (6 Yr.) 1 Greene 2 Dr. Andrea Malmont AUDITOR (6 Yr.) 1 Greene 2 Lapinski AUDITOR (6 Yr.) 1 Gree
5 - BEARINGS Ball Bearings, Plain pgs. 5-8 & 5-10 Precision Ball Bearings, Plain pg. 5-6 Precision Ball Bearings, Flanged pg. 5-7 Ball Bearings, Flanged pg. 5-9 Nonmetallic Ball Bearings pg. 5-11 Hydro-Dynamic Pressure Bearings 5-13 Linear Ball Bearings, Closed Type pgs. 5-14 & 5-15 Frelon Lined Linear Bearings, Self-Lubricating pg. 5-22
SOUTHERN CROSS CREDIT UNION 2 Commercial Road, Murwillumbah Ph. 6672 2744 TWEED ENDEAVOUR CRUISES River Terrace, Tweed Heads Ph. 0755 368800 RUSSELL J BAXTER SOLICITOR N.S.W. & QLD (Honorary Club Solicitor) 28 Recreation Street, Tweed Heads Ph. 0755 992266 AN
(RCT bearings), ball screw support bearings, turntable bearings, as well as rectilinear motion bearings (linear ball bearings, linear roller bearings and linear flat roller bearings). A-5 Outerring Inner ring Cage Ball Deep groove ball bearing Fig 1.1 Ball Cage Outer ring Inner ring Angular contact ball bearing Fig. 1.2 Inner ring Outer ring .
Pump Bearings enable variability to save CO2. Bearing Solutions for Engine Needle Roller Bearings Thrust Needle Roller Bearings Planetary Gear Bearings One Way Clutches, e.g. for Oil-Pump Ball Bearings for Transmission Tandem Ball Bearings (TBB) Tapered Roller Bearings (TRB) Ball Bearing Cartridge for Turbocharger
Product Technical Support . Tweed-New Haven can serve aircraft up to and including the Boeing 737-800 and Boeing 757 series. Alongside scheduled jet services to Philadelphia and Charlotte, Tweed -New . be available to review your support questions and you will usually ge t a reply on the forums
Councillor Katie Milne. Tweed Shire Mayor. What is ‘Living and Loving the Tweed’? A message from the Mayor and Councillors. The theme of this Community . Strategic Plan 2017–2027 of ‘Living and Loving the Tweed’ says so much about the unique environment in which we liv
ASTM C 67 Test Method for Sampling and Testing Brick and Structural Tile. 3. ASTM C 150 Standard Specification for Portland Cement. 4. ASTM C 297 Standard Test Method for Flatwise Tensile Strength of Sandwich Constructions. 5. ASTM C 578 Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation. 6. ASTM D 968 (Federal Test Standard 141A Method 6191) Standard Test Methods for .
