Boston Gear (Altra) B912-8 Plain Sleeve & Flanged BearingsSpecification
| Function | For excavator | Condition | 100%new,durable,long life | Part name | Piston |
| Color | As you need | Packing | Standard export package | Feature | Strong,flexible,low cost |
| Inventory | In stock | Payment terms | T/T | Certificate | ISO |
| Warranty | 3 months |
| da max. | 808 mm |
| C | 280 mm |
| M | 13 mm |
| Material constant KM | 1055 |
| b1 | 35 mm |
| da min. | 766 mm |
| α | 3 ° |
| ra max. | 3 mm |
| Mass plain bearing | 728 kg |
| r1 min. | 3 mm |
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d5:114 mm; Grub (set) / Locking screw size:M 6; Recommended tightening torque:14.2 N·m; Mass:1.2 kg; G:M 85x2; b:10 mm; d3:115 mm; B:32 mm; h:4 mm; d1:110 mm;
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Basic dynamic load rating C:104 kN; B:59.531 mm; s:29.766 mm; H2:33.337 mm; J max.:180.975 mm; Limiting speed:4100 r/min; H:114.3 mm; L:225.425 mm; Attachment bolt diameter G:15.875 mm; Mass bearing unit:4.76 kg;
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B:163 mm; D1 ≈:617 mm; K:12 mm; b:22.3 mm; Da max.:657 mm; Basic static load rating C0:6950 kN; d3:540 mm; Calculation factor Y1:3; Ba min.:17 mm; B1:234 mm;
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d:320 mm; Calculation factor Y1:1.5; Calculation factor Y2:2.2; r5 min.:1.5 mm; Basic dynamic load rating C:2852 kN; K:6 mm; l:20.55 mm; Calculation factor e:0.46; db min.:342 mm; C:168 mm;
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Mass needle roller and cage assembly:0.018 kg; Limiting speed:18000 r/min; Ew:30 mm; U:20 mm; Basic static load rating C0:36.5 kN; Reference speed:16000 r/min; Fw:25 mm; Basic dynamic load rating C:20.9 kN; Fatigue load limit Pu:4.4 kN;
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Limiting speed:750 r/min; B:218 mm; rb max.:3 mm; Basic static load rating C0:6550 kN; Da max.:443 mm; r1,2 min.:4 mm; d:300 mm; D:460 mm; ra max.:3 mm; Calculation factor kr:0.5;
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d:460 mm; with cylindrical bore:160 min-1; Grease:15530 kN; Dynamic (Cr):12 mm; rs (min):7.5 mm; with tapered bore:200 min-1; Static (Cor):22.3 mm; Pu:7370 kN; D:760 mm; Oil:1090.320 kN;
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Basic Static Radial Load Rating Co:465000 N; Fillet Radius rb:1.00 mm; Basic Dynamic Radial Load Rating C:336000 N; Grease Speed Rating n1:1700 rpm; D:350.0000 mm; B:51.00 mm; Oil Speed Rating n2:2100 rpm; Fillet Radius ra:2.50 mm; d:220.000 mm;
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Grease Speed Rating n1:15000 rpm; B:15.9 mm; Accessories:One Seal; Basic Dynamic Radial Load Rating C:10400 N; d:12.000 mm; Basic Static Radial Load Rating Co:5600 N; Fillet Radius ra:0.64 mm; Sealed Speed Rating n3:15000 rpm; D:32.0000 mm; Oil Speed Rating n2:20000 rpm;
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Oil Speed Rating Open/Shielded n2:3200 rpm; B:35.00 mm; Grease Speed Rating Open/Shielded n1:2600 rpm; Accessories:Without Accessories; D:225.0000 mm; Basic Dynamic Radial Load Rating C:125000 N; Fillet Radius ra:2.00 mm; d:150.000 mm; Basic Static Radial Load Rating Co:125000 N; Sealed Speed Rating
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Preload class B GB:220 N; Da max.:70.4 mm; d1:54.2 mm; Calculation factor f2D:1.09; Calculation factor fHC:1; r1,2 min.:1 mm; Calculation factor f0:15.1; Db max.:73 mm; Basic dynamic load rating C:28.6 kN; Attainable speed for grease lubrication:19000 r/min;
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Coefficient of friction µ max.:0.2; Permissible sliding velocity v min.:0 m/s; Mass strip:0.47 kg; L:500 mm; H:1.5 mm; Coefficient of friction µ min.:0.02; Specific static load factor K0:250 N/mm²; B:100 mm; Specific dynamic load factor K:120 N/mm²; Permissible sliding velocity
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Mass needle roller:0.77 g; r1 max.:0.6 mm; r2 max.:0.8 mm; Dw:3 mm; r1,2 min.:0.2 mm; Lw:13.8 mm;
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Grease Speed Rating Open/Shielded n1:4100 rpm; Basic Static Radial Load Rating Co:90000 N; B:33.00 mm; d:55.000 mm; D:140.0000 mm; Basic Dynamic Radial Load Rating C:108000 N; Accessories:One Shield; Fillet Radius ra:2.00 mm; Oil Speed Rating Open/Shielded n2:5000 rpm;
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D:68 mm; Mass bearing:0.29 kg; C1:3.5 mm; Calculation factor Y0:0.9; Fatigue load limit Pu:7.65 kN; C:14.5 mm; r1,2 min.:1 mm; da max.:46 mm; B:19 mm; Basic dynamic load rating C:64.7 kN;
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| CompareBoston Gear (Altra) B912-8 Plain Sleeve & Flanged Bearings |
| D | B | C | d | S | C0 | Z_ | Fw |
| TAFI 91912 | 19 mm | 12 mm | 6,61 kN | 9 mm | 0,5 mm | 7,26 kN | - | 12 mm |
| RNA6912TT | 85 mm | - | 94,5 kN | 68 | - | 187 kN | - | 68 mm |
| RNA5912 | 85 mm | - | 34 mm | 68 | - | - | - | 68 mm |
| RNA5912 | 85 mm | - | 80,5 kN | 68 | - | 153 kN | - | 68 mm |
| F-91236 | 33 mm | - | 19 mm | 22 mm | - | - | - | - |
| FBNP-91213 | 12 | - | 5.1 | 9 | - | 5.75 | 11 | 9 mm |
| B912-8 | 1 Inch | 25.4 Millimeter | - | - | 0.565 Inch | 14.351 Millimeter | - | - | - | - |
| FFB912-8 | 1 in | - | - | 9/16 in | - | - | - | - |
| FB912-8 | 1 in | - | - | 9/16 in | - | - | - | - |
| B912-8 | 3/4 in | - | - | 9/16 in | - | - | - | - |
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