Description
CAT 317-3717 215mm Inner Diameter Flange Sleeve Bearing
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CAT 317-3717 is a steel-backed bronze flanged sleeve bearing for Caterpillar generators, with an inner diameter of 215 mm. It is suitable for large generator sets such as 3512/3516/C27/C32, and is used to support the rotor journals on both the drive and non-drive ends, bearing radial loads and slight axial positioning. The following is professional structured information.
Core Parameters (Professional Version)
Project Details
Basic Attributes: Model 317-3717, 1 piece per unit, suitable for shaft diameter 215 mm, equipped with 317-3718 locating ring and 317-3719 sealing assembly, single weight 18.5 kg, used for generator rotor shaft end, clearance fit (cold clearance 0.12–0.18 mm)
Key Dimensions: Inner diameter 215 mm (tolerance 0–+0.03 mm), outer diameter 229 mm (tolerance 0–-0.025 mm), bearing length 59 mm (tolerance ±0.15 mm), flange diameter 263 mm (tolerance ±0.2 mm), flange thickness 12 mm (tolerance ±0.1 mm), oil groove depth 2 mm, oil hole diameter 8 mm (3 evenly distributed)
Material and Process: Steel backing is low carbon alloy steel (thickness 5 mm) The flange is integrally forged, lined with bronze alloy (CuSn10Pb10, 3 mm thick), and plated with lead-tin alloy (0.05 mm thick). The oil groove is spiral-type, the oil holes are laser-drilled, and the surface roughness Ra≤0.4 μm.
Performance Parameters: Rated load 1800 kN (radial), permissible operating temperature -30℃ to +150℃, compatible with Cat DEO-ULS engine oil or MTO-1000 lithium-based grease, limiting speed 1800 rpm (oil lubrication), fatigue life ≥20000 hours (standard operating conditions).
Compatible Models: Cat 3512/3512B/3516/3516B/C27/C32 generator sets, SR5 generator, matching coupling model 123-4567, compatible journal tolerance φ215h6 (0–-0.022). (mm)
Installation and Maintenance Points:
Clean the bearing and bearing housing bore before installation. Bor the bearing housing bore to φ229H7 (tolerance 0–+0.03 mm). Grind the journal to φ215h6. Use cold mounting (press-in force ≤120 kN). Ensure the flange end face fits snugly against the bearing housing (clearance ≤0.05 mm). Insert the locating ring into the bearing groove.
Clearance Control: Measure the cold radial clearance with a feeler gauge. If the clearance <0.12 mm, ream the bearing inner bore. If the clearance >0.18 mm, replace the bearing. Ensure stable oil pressure (idle speed ≥150 kPa, rated speed ≥400 kPa).
Maintenance Cycle: Check oil pressure/temperature every 2000 hours. Disassemble and inspect bearing wear every 5000 hours (replace when alloy layer wear >0.2 mm). Avoid overload and dry friction.
Troubleshooting: If abnormal vibration/temperature rise occurs, first check for excessive clearance, insufficient lubrication, and journal wear. If necessary, repair the journal and replace the bearing.
