BOCCOLE ERNESTO RAAB SRL

Size: px

Start display at page:

Download "BOCCOLE ERNESTO RAAB SRL"

Roy Lewis
5 years ago
Views:

C A BOCCOLE T A L O G O NESTO RAAB SRL Via Ghisalba,3-2002 Ospiate di Bollate (MILANO) Tel.

1 C A BOCCOLE T A L O G O NESTO RAAB SRL Via Ghisalba, Ospiate di Bollate (MILANO) Tel.: Fax : cuscinetti@ernestoraab.it

2 Internal clearance and mounting tolerances Metric sizes Bush diameter Internal clearance s SF- SF-2 Bush diameter Internal clearance s SF- SF-2 Di Do Smin Smax Smin Smax Di Do Smin Smax Smin Smax mm mm mm mm mm mm mm mm mm mm mm mm 2 3, ,00 0,39 0, , ,5 0,000 0, ,00 0, ,020 0, , , , , ,086 0, , , , ,070 0, , , , ,2 0, ,294 0, , , , , , , , , , ,020 0, ,20 0,00 Theoretical internal clearance s ,209 -

3 Maintenance-free plain bearing material primary for dry running BUSHES SF - pv max =,8 N/mm² * m/s pv temp = 3,6 N/mm² * m/s p max st = 250 N/mm² p max d = 56 N/mm² V max = 2m/s ϑ = -200 C to +280 C Low-maintenance plain bearing material lubrication required BUSHES SF - 2 pv max = 3,0 N/mm² * m/s p max st = 250 N/mm² p max d = 70 N/mm² V max = 3 m/s ϑ = -40 C to +0 C ϑ max = up to +40 C for short periods Bushes Flanged maintenance- bushes free: maintenance- SF - free: low- SF - maintenance: SF - 2

4 conversion factors Surface roughness ISO tolerances Surface roughness Conversion factors Dimensions Mass Force Temperature Speed Torque Pressure pv value AA R a and R t R z RMS Surface CLA symbols mm minch mm mm minch 0,20 8,00,0,0 8,96 nnnn 0,25 0,00 - -,20 0,30 2,00,5,6 3,44 mm 0,039 in 0,32 3, ,56 in 25,400 mm 0,40 6,00 2,0 2,0 7,92 nnn mm 0, in 050 0,50 20, ,5 25 2,5 22,40 0,00 in 0,025 mm 0,63 25,00 3,0 3,0 28,00 g 0,0022 lbs 0,80 32,00 4,0 4,0 35,84 lb 453,600 g,00 40, ,80 nn N 0,225 lbf,20 48,00 6,3 6,3 53,76 lbf 4,450 N 9 x C 5 F = + 32 C = (F - 32) ISO tolerances for shafts C F Nominal dimension range in mm - 40 C - 40 F over C F incl C F Deviations in mm C F upper f 7 m / s 96,848 fpm = 3,28 ft/s lower m / s 394,000 fpm upper h 6 3 m / s 590,000 fpm lower ft / s 0,3048 m/s upper h 7 Nmm 0,0009 in * lbf lower in * lbf 3 Nmm upper h 8 Nmm 8,850 lower in * lbf N / mm² = Mpa ISO tolerances for holes 250 N / mm² Designation psi Nominal dimension range in mm,8 N/mm² * m / s over ,0 N/mm² * m/s incl ,6 N/mm² * m/s Deviations in mm g 7 h 6 upper lower upper h 7 upper h 8 upper j 7 upper lower Designation Normal devi. Normal devi.

5 Conversion to DIN ISO 3457 DIN 494, which has been applicable up to now, specifies the deviations for outside diameters up to D₀ 80 mm, and DIN ISO 3457 additionally specifies them for D₀ < 80 mm. The deviations for the outside diameters up to D₀ therefore correspond to the specifications in Table 8 or to DIN ISO 3457 for the transitional period. Deviations for the outside diameters Table 8 - deviations for outside diameters D₀ Outside diameter for bush D₀ D₀ 0 0 < D₀ 8 8 < D₀ < D₀ < D₀ < D₀ < D₀ < D₀ < D₀ 305 (Test A to DIN ISO ) upper + 0, , , , ,00 + 0,20 + 0,70 + 0,20 + 0,260 Deviations SF - 2 lower + 0, , , , , , ,00 + 0,30 + 0,70 Table 0 - Wall thicknesses S₃ for bushes SF - 2 Inside diameter Wall tickness D S₃ Deviations SF - 2 to DIN ISO Table 3, series D upper lower 8 D < 20-0,020-0,08 20 D < 28,5-0,025-0,09 28 D < ,030-0, D < 80 2,5-0,035-0, D 2,5-0,040-0,030 Chamfers and chamfer tolerances Table - Outer chamfer C₀ and inner edge break C (Figure ) for bushes in metric sizes, to DIN ISO 3457-, Table 2 Wall tickness S₃ 0,75,00,50 2,00 Outer chamfer, machined without cutting (₁ C₀ 0,5 ± 0,3 0,6 ± 0,4 0,6 ± 0,4,0 ± 0,4 2,50,2 ± 0,4 min 0, 0, 0, 0, 0,2 Inner edge break C max 0,4 0,5 0,7 0,7 Wall thicknesses with tolerances Table 9 - Wall thicknesses S₃ for bushes and flanged bushes SF - Deviations SF - Inside diameter Wall to DIN ISO tickness Table 3, series B D S₃ upper lower D < 5 0,75 0-0, D <20 + 0,005-0, D < 28,5 + 0,005-0, D < ,005-0, D < 80 2,5 + 0,005-0, D < 20 2,5-0,00-0, D 2,5-0,035-0,085 C₀ should be correspondingly larger for bushs with a bearing bore that must be machined to size. Chamfer deformation due to round bending is permissible. (₁ For a transitional period, bushes with differing chamfers can be supplied for wall ticknesses 2 mm and 2,5 mm. Outher chamfer C₀ and inner edge break C for metric sizes

6 SF plain bearing material, maintenance-free () (2) (3) Running-in layer ():polytetrafluoroethylene (PTFE) and lead (Pb), 0,0mm to 0,03 mm thick Silding layer (2): porous bronze layer filed with PTFE/Pb, 0,20 mm to 0,35mm thick Bronze backing (3) Technical data Maximun pv value for dry running Permissible specific bearing load Permissible sliding speed continuos operation pv,8 for short periods pv 36 3,6 static p max 250 very low sliding speed p max 40 rotating, oscillating p max 56 dry running V max 2 hydrodynamic operation V max > 2 N / mm 2 * m / s N / mm 2 m / s Permissible operating temperature - ϑ to C Coefficient of thermal expansion Coefficient of thermal conducictivity steel backing α St * 0-6 bronze backing α Bz 7 * 0-6 steel backing γ St > 42 bronze backing γ Bz > 70 K - W (m* K) - Relative electrical resistance after running-in R rel min > 70 Ω * cm 2

7 Maintenance-free plain bearing material primary for dry running BUSHES SF - pv max =,8 N/mm² * m/s pv temp = 3,6 N/mm² * m/s p max st = 250 N/mm² p max d = 56 N/mm² V max = 2m/s ϑ = -200 C to +280 C Low-maintenance plain bearing material lubrication required BUSHES SF - 2 pv max = 3,0 N/mm² * m/s p max st = 250 N/mm² p max d = 70 N/mm² V max = 3 m/s ϑ = -40 C to +0 C ϑ max = up to +40 C for short periods Bushes Flanged maintenance- bushes free: maintenance- SF - free: low- SF - maintenance: SF - 2

8 conversion factors Surface roughness ISO tolerances Surface roughness Conversion factors Dimensions Mass Force Temperature Speed Torque Pressure pv value AA R a and R t R z RMS Surface CLA symbols mm minch mm mm minch 0,20 8,00,0,0 8,96 nnnn 0,25 0,00 - -,20 0,30 2,00,5,6 3,44 mm 0,039 in 0,32 3, ,56 in 25,400 mm 0,40 6,00 2,0 2,0 7,92 nnn mm 0, in 050 0,50 20, ,5 25 2,5 22,40 0,00 in 0,025 mm 0,63 25,00 3,0 3,0 28,00 g 0,0022 lbs 0,80 32,00 4,0 4,0 35,84 lb 453,600 g,00 40, ,80 nn N 0,225 lbf,20 48,00 6,3 6,3 53,76 lbf 4,450 N 9 x C 5 F = + 32 C = (F - 32) ISO tolerances for shafts C F Nominal dimension range in mm - 40 C - 40 F over C F incl C F Deviations in mm C F upper f 7 m / s 96,848 fpm = 3,28 ft/s lower m / s 394,000 fpm upper h 6 3 m / s 590,000 fpm lower ft / s 0,3048 m/s upper h 7 Nmm 0,0009 in * lbf lower in * lbf 3 Nmm upper h 8 Nmm 8,850 lower in * lbf N / mm² = Mpa ISO tolerances for holes 250 N / mm² Designation psi Nominal dimension range in mm,8 N/mm² * m / s over ,0 N/mm² * m/s incl ,6 N/mm² * m/s Deviations in mm g 7 h 6 upper lower upper h 7 upper h 8 upper j 7 upper lower Designation Normal devi. Normal devi.

9 Conversion to DIN ISO 3457 DIN 494, which has been applicable up to now, specifies the deviations for outside diameters up to D₀ 80 mm, and DIN ISO 3457 additionally specifies them for D₀ < 80 mm. The deviations for the outside diameters up to D₀ therefore correspond to the specifications in Table 8 or to DIN ISO 3457 for the transitional period. Deviations for the outside diameters Table 8 - deviations for outside diameters D₀ Outside diameter for bush D₀ D₀ 0 0 < D₀ 8 8 < D₀ < D₀ < D₀ < D₀ < D₀ < D₀ < D₀ 305 (Test A to DIN ISO ) upper + 0, , , , ,00 + 0,20 + 0,70 + 0,20 + 0,260 Deviations SF - 2 lower + 0, , , , , , ,00 + 0,30 + 0,70 Table 0 - Wall thicknesses S₃ for bushes SF - 2 Inside diameter Wall tickness D S₃ Deviations SF - 2 to DIN ISO Table 3, series D upper lower 8 D < 20-0,020-0,08 20 D < 28,5-0,025-0,09 28 D < ,030-0, D < 80 2,5-0,035-0, D 2,5-0,040-0,030 Chamfers and chamfer tolerances Table - Outer chamfer C₀ and inner edge break C (Figure ) for bushes in metric sizes, to DIN ISO 3457-, Table 2 Wall tickness S₃ 0,75,00,50 2,00 Outer chamfer, machined without cutting (₁ C₀ 0,5 ± 0,3 0,6 ± 0,4 0,6 ± 0,4,0 ± 0,4 2,50,2 ± 0,4 min 0, 0, 0, 0, 0,2 Inner edge break C max 0,4 0,5 0,7 0,7 Wall thicknesses with tolerances Table 9 - Wall thicknesses S₃ for bushes and flanged bushes SF - Deviations SF - Inside diameter Wall to DIN ISO tickness Table 3, series B D S₃ upper lower D < 5 0,75 0-0, D <20 + 0,005-0, D < 28,5 + 0,005-0, D < ,005-0, D < 80 2,5 + 0,005-0, D < 20 2,5-0,00-0, D 2,5-0,035-0,085 C₀ should be correspondingly larger for bushs with a bearing bore that must be machined to size. Chamfer deformation due to round bending is permissible. (₁ For a transitional period, bushes with differing chamfers can be supplied for wall ticknesses 2 mm and 2,5 mm. Outher chamfer C₀ and inner edge break C for metric sizes

10 Internal clearance and mounting tolerances Metric sizes Bush diameter Internal clearance s SF- SF-2 Bush diameter Internal clearance s SF- SF-2 Di Do Smin Smax Smin Smax Di Do Smin Smax Smin Smax mm mm mm mm mm mm mm mm mm mm mm mm 2 3, ,00 0,39 0, , ,5 0,000 0, ,00 0, ,020 0, , , , , ,086 0, , , , ,070 0, , , , ,2 0, ,294 0, , , , , , , , , , ,020 0, ,20 0,00 Theoretical internal clearance s ,209 -

11 SF plain bearing material, maintenance-free () (2) (3) Running-in layer ():polytetrafluoroethylene (PTFE) and lead (Pb), 0,0mm to 0,03 mm thick Silding layer (2): porous bronze layer filed with PTFE/Pb, 0,20 mm to 0,35mm thick Bronze backing (3) Technical data Maximun pv value for dry running Permissible specific bearing load Permissible sliding speed continuos operation pv,8 for short periods pv 36 3,6 static p max 250 very low sliding speed p max 40 rotating, oscillating p max 56 dry running V max 2 hydrodynamic operation V max > 2 N / mm 2 * m / s N / mm 2 m / s Permissible operating temperature - ϑ to C Coefficient of thermal expansion Coefficient of thermal conducictivity steel backing α St * 0-6 bronze backing α Bz 7 * 0-6 steel backing γ St > 42 bronze backing γ Bz > 70 K - W (m* K) - Relative electrical resistance after running-in R rel min > 70 Ω * cm 2

DU series bushes (PAP P10 / EGB E40) maintenance-free

DU series bushes (PAP P10 / EGB E40) maintenance-free Characteristics 1. PTFE 0,01-0,03 mm 2. Porous bronze 0,20-0,30 mm 3. Steel backing 0,40-2,20 mm 4. Tin or copper plating ~ 0,005-0,008 mm Usage: DU bushes are widely used in hydraulic vehicles, automobiles,