383-4240 Star Gear 3834240 Drive Ring Gear For PM620 Milling Travel System
This ring gear is supplied for final drive rebuild work rather than routine part swapping. When a PM620 milling machine comes in with travel drive noise, backlash or a failed planetary set, the ring gear is usually the part that decides whether the rebuild holds: the tooth profile has to mesh cleanly with the existing planet gears, and the bore and mounting faces have to sit true on the carrier. That is the standard this part is produced and inspected against.
Built for rebuild work, not just for fitting
Tooth profile matched to the assemblyThe gear is machined to the OEM profile so it can be paired with the original planet gears and sun gear without introducing a new contact pattern or running noise.
Heat treated for load reversalForged alloy steel, hardened and tempered to carry the repeated forward and reverse travel loads a milling machine undercarriage sees in daily planing work.
Bore and face geometry checkedMounting bore, locating face and overall thickness are inspected before dispatch, since a small run-out error here shows up as vibration after the rebuild.
Rebuild supportVideo technical support is available during assembly and backlash setting, and a replacement is covered under a 1-year warranty.
Matching it to the final drive assembly
The 383-4240 gear sits inside the travel final drive of the PM620 milling machine, working with the planetary carrier, planet gears and sun gear. Before ordering, confirm the machine serial range and, where the drive has already been rebuilt once, the part number on the gear being replaced. If the carrier or planet gears are also worn, quote them together so the tooth contact pattern can be set as a set rather than mixed with used parts.
Specification
| Part number |
383-4240 |
| Part name |
Travel drive ring gear |
| Machine model |
PM620 milling machine |
| Assembly position |
Travel final drive, planetary gear set |
| Material |
Forged alloy steel, heat treated |
| Condition |
New |
| Warranty |
1 year |
| Test report |
Machinery test report provided |
Rebuild order checklist
1. Machine and serial rangeConfirms the final drive generation on the machine, since PM620 drives changed over the production run.
2. Parts being replaced togetherList ring gear, planet gears, sun gear and bearings so the set can be quoted and set up as a matched group.
3. Failure photosA photo of the worn teeth and the old part number helps confirm the correct replacement before shipment.
Packing and delivery
The gear is wrapped with rust preventive, cushioned, then packed in carton and pallet or a wooden box for export. Standard lead time is 7-10 days after payment, with air freight offered when a machine is down and waiting on the rebuild. Payment is accepted by T/T, L/C or Western Union, and shipment is arranged from Shanghai.
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