Hallite bearing seal 87
Technical details
| OPERATING CONDITIONS | METRIC | INCH |
| Maximum Speed | 5.0 m/sec | 16 ft/sec |
| Temperature Range | -50°C +200°C | -58°F +390°F |
| TYPICAL PHYSICAL PROPERTIES | METRIC | INCH |
| Specific Gravity | 3.1 | 3.1 |
| Compression Stress at Yield | 20 MN/m² @ 23°C | 2900 psi @ 73°F |
| Compression Stress at Yield | 9 MN/m² @ 80°C | 1300 psi @ 176°F |
| Coefficient of Thermal Conductivity | 2.5 W/mK | 1.4 Btu/hft°F |
| Coefficient of Thermal Expansion – Length & Thickness | 6.5 x 10-5 per °C | 3.6 x 10-5 per °F |
| Coefficient of Dynamic Friction on Steel Surface (0.2 μmRa) / (8 μinCLA) | Dry 0.25 | Dry 0.25 |
| Lubricated 0.05 | Lubricated 0.05 |
| HOUSING DETAILS & TOLERANCES | ||
| Rod | Ød₁ mm | f9 |
| ØD₂ = Ød₁ + 2S mm | ≤ Ø80 H10 > Ø80 H9 | |
| ØD₃ = Ød₁ + G mm | G min / max | |
| L₁ mm | +0.20 -0 | |
| Piston | ØD₁ mm | H11 |
| Ød₂ = ØD₁ – 2S mm | h8 | |
| Ød₃ = ØD₁ – G mm | G min / max | |
| L₁ mm | +0.20 -0 |
| SURFACE ROUGHNESS | µmRa | µmRz | µmRt | µinRa | µinRz | µinRt |
| Dynamic Sealing Face Ød₁, ØD₁ | 0.4 | 1.6 max | 4 max | 16 | 63 max | 157 max |
| Static Sealing Face ØD₂, L₁, Ød₂ | 3.2 max | 10 max | 16 max | 125 max | 394 max | 630 max |
| METRIC | ||
| Part No. | L₁ | S |
| 8772000 | 5.60 | 1.50 |
| 8772100 | 6.00 | 4.00 |
| 8772200 | 6.30 | 2.00 |
| 8772300 | 6.30 | 2.50 |
| 8772400 | 8.00 | 1.50 |
| 8772500 | 8.00 | 2.00 |
| 8772600 | 8.00 | 4.00 |
| 8772700 | 9.70 | 4.00 |
| 6663300 | 10.00 | 2.00 |
| 8772800 | 10.00 | 2.50 |
| 8772900 | 12.00 | 2.00 |
| 8773000 | 12.00 | 2.50 |
| 6663400 | 15.00 | 2.00 |
| 6635000 | 20.00 | 2.00 |
| 8773100 | 25.00 | 3.00 |
| 8773200 | 30.00 | 3.00 |
| 8773300 | 50.00 | 2.00 |