Upper structure rocking or swing grinding on your ZX70 or ZX80? A worn ZX70-5G slew ring develops ball groove pitting that creates vertical play in the upper structure, making precise bucket placement difficult and accelerating swing motor pinion wear. RITO supplies this heavy-duty slew ring to restore tight, smooth-running upper structure rotation on your Hitachi compact excavator.
Item NO.:
ZX70-5G Slewing RingOrder(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In StockZX70-5G Slewing Ring for Hitachi ZX70-5G, ZX70, ZX80 and ZX75US excavators. Compact-format slew ring with through-hardened ball groove and precision-cut internal gear teeth. The smaller ring diameter of the ZX70 class concentrates ball loads over fewer balls; precise groove hardness uniformity and tight ball-to-groove clearance are critical to resisting brinelling under the weight of the compact upper structure.
| Part Number | ZX70-5G Slewing Ring |
|---|---|
| Part Name | Slewing Ring / Swing Bearing / Turntable |
| Compatible Brand | Hitachi |
| Applicable Models | ZX70-5G, ZX70, ZX80, ZX75US Excavator |
| Application | Upper-to-lower structure pivot bearing and swing gear ring on Hitachi ZX70-5G / ZX80 |
| Material | 42CrMo alloy steel, induction-hardened ball groove |
| Product Color | Black primer coat |
| Working Temperature | -30°C~+80°C |
| Key Function | Supports ZX70/ZX80 upper structure weight, transmits swing torque through internal gear teeth |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Ball groove induction-hardened to HRC 55-60 with uniformity across the full circumference, preventing localised brinelling under the concentrated ball loads of the smaller-diameter ZX70 ring.
Internal swing gear teeth cut to DIN 8 quality for accurate mesh with the ZX70 swing motor pinion, ensuring quiet, backlash-controlled cab rotation.
Upper and lower lip seals retain grease in the compact ball circuit while excluding the fine soil contamination that accelerates ball and groove wear in compact excavator applications.
Single slew ring covers ZX70-5G, ZX70, ZX80 and ZX75US, addressing the full Hitachi compact excavator range in this size class.
FAQ
Q: How do I measure if the ZX70-5G slew ring needs replacing?
A: Mount a dial indicator on the counterweight. Vertical play exceeding 1.5 mm indicates ball groove wear. Also rotate slowly and feel for periodic roughness indicating a worn section of the groove circuit.
Q: How often should the ZX70 slew ring be greased?
A: Grease every 50 hours using lithium-complex or moly-EP grease specified by Hitachi. Rotate the upper structure through 360 degrees during greasing to distribute grease to all balls, including the section normally parked under the counterweight.
Q: Can I replace the ZX70 slew ring without removing the upper structure?
A: Slew ring replacement requires lifting the upper structure off the lower carrier. The operation requires adequate lifting equipment rated for the ZX70 upper structure weight. Contact a specialist workshop if lifting equipment is unavailable.
Q: How to confirm this slew ring fits my ZX70-5G?
A: Match inner bore, outer diameter, ball count, bolt-circle diameters and internal gear tooth count. Provide the ZX70 serial number to our team for cross-reference confirmation.
Q: What quality options are available?
A: We provide original, OEM and high-quality aftermarket versions with stable supply capability.
Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companies
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