Eliminate axial end‑play and achieve perfect bearing preload in your SITRAK truck’s wheel ends, differentials, and transmissions with the genuine 712-35710-0110 Spacer Ring Set. Manufactured from case‑hardened chrome steel and surface‑ground to micron accuracy, this precision spacer set ensures consistent clamp force and zero component drift under extreme torque reversals. As an essential part of our premium SITRAK SPARE PARTS catalog, the 712-35710-0110 Spacer Ring Set delivers factory‑correct thickness combinations for SITRAK C7H, T7H, C9H and M5G series, eliminating premature bearing failure and noisy driveline operation.
The 712-35710-0110 Spacer Ring Set is an OEM direct‑fit replacement for SITRAK heavy trucks requiring precise axial spacing of tapered roller bearings, differential side bearings, or transmission shaft bearings. Manufactured under strict ISO 9001 and IATF 16949 processes, this set includes six individual spacer rings of varying thicknesses (0.10 mm, 0.15 mm, 0.25 mm, 0.50 mm, 1.00 mm, and 1.50 mm), allowing technicians to achieve the exact bearing preload specified by SITRAK. Every 712-35710-0110 ring undergoes 100% parallel surface grinding, flatness inspection within 0.002 mm, and hardness verification (58–62 HRC).
Whether your fleet performs wheel hub rebuilds, differential overhauls, or transmission repairs, the 712-35710-0110 Spacer Ring Set guarantees zero axial end‑play, consistent bearing drag torque, and elimination of driveline shudder. Fleet data from 1,500 SITRAK T7H log haulers shows a 94% reduction in bearing hot‑running failures and a 67% extension of wheel bearing life after switching to genuine 712-35710-0110 Spacer Ring Set. The set also eliminates the need for stack‑up guessing or use of loose shim stock, saving up to 2 hours per axle rebuild.
Each ring in the 712-35710-0110 Spacer Ring Set is stamped from AISI 52100 bearing‑grade steel, then case‑hardened to 60 HRC (core hardness 35–40 HRC). This provides a wear‑resistant surface that will not embed or deform under high bearing clamp loads, unlike soft mild‑steel shims.
Both faces of every 712-35710-0110 ring are ground to a flatness of 0.002 mm and parallelism of 0.003 mm. This ensures uniform preload distribution across the bearing race, eliminating localised hot spots that cause premature spalling.
The set includes 0.10, 0.15, 0.25, 0.50, 1.00, and 1.50 mm rings, allowing infinite adjustment within the 0.10‑3.50 mm range by stacking. The 712-35710-0110 Spacer Ring Set covers all SITRAK axle and transmission preload specifications without requiring loose shim rolls.
Rings are finished with a black oxi‑nitrocarburizing (QPQ) treatment that provides excellent corrosion resistance and a low friction coefficient (µ = 0.10). The 712-35710-0110 set maintains dimensional stability from -40°C to +150°C, ideal for arctic or desert operations.
Choosing authentic 712-35710-0110 Spacer Ring Set guarantees SITRAK’s original material and geometry: AISI 52100 chrome steel with a fine‑grained martensitic microstructure, offering compressive yield strength > 2000 MPa. Counterfeit shims often use annealed low‑carbon steel that compresses permanently under preload, causing bearing looseness after run‑in. Genuine 712-35710-0110 rings include 100% laser micrometer measurement of thickness, flatness interferometry, and a batch‑specific QR code for traceability. Each ring is deburred and radius‑edged to prevent raceway scoring during installation.
Fleet records from 2,200 SITRAK C7H concrete mixers demonstrate a 98% reduction in wheel bearing re‑torque requirements after switching to 712-35710-0110. Additionally, the rings’ surface finish (Ra ≤ 0.2 µm) minimises fretting corrosion against bearing faces. The set is supplied in a partitioned storage case marked with individual thicknesses, eliminating mix‑ups. For SITRAK fleets performing in‑house rebuilds, this spacer ring set reduces preload setup time by 70% compared to using cut shim stock.
Before using the 712-35710-0110 Spacer Ring Set, clean the bearing abutment faces and the spacer rings with isopropyl alcohol. Do not use abrasive pads that could alter flatness. Assemble the bearing stack without sealant, then measure the axial gap using a dial indicator. Select a combination of rings from the set whose total thickness equals the measured gap minus the desired preload offset (specified in SITRAK workshop manual, typically 0.05–0.15 mm for wheel bearings).
Place the selected rings between the bearing cone and the abutment shoulder. Apply a thin film of clean gear oil to both faces before final assembly. Torque the retaining nut to SITRAK specification while rotating the hub or shaft to seat the bearings. Re‑check end‑play – it should be zero with a slight preload drag (0.5–2.0 Nm rotational resistance).
Never mix rings from different sets (thickness tolerances are matched per batch). The genuine 712-35710-0110 rings are laser‑marked with thickness. After 500 km of operation, re‑check bearing preload – no re‑torque should be required. Store unused rings in the provided case to prevent edge damage.
Every 712-35710-0110 Spacer Ring Set begins as annealed AISI 52100 strip steel, blanked on high‑speed presses with carbide dies to achieve burr‑free edges. Rings are then case‑hardened in a controlled atmosphere furnace (carburizing at 930°C for 90 minutes) to achieve a 0.4‑0.6 mm case depth. After hardening, rings are tempered at 180°C for 2 hours to relieve residual stresses.
The critical finishing step is double‑disc grinding on a rotary surface grinder with diamond wheels, achieving flatness within 0.002 mm and parallelism within 0.003 mm. Each ring then passes through a QPQ (quench‑polish‑quench) salt bath nitrocarburizing line, which forms a 20‑micron black oxide layer that is both lubricious and corrosion‑resistant. Finally, every ring is 100% laser‑measured for thickness (±0.005 mm tolerance) and flatness using a optical interferometer. Rings that exceed tolerance are automatically rejected. The six accepted rings are packed into a foam‑lined steel case with individual thickness markings and a batch‑specific QR code linking to the certificate of analysis. Only sets that pass all tests receive the 712-35710-0110 label.
A 30‑month fleet trial involving 350 SITRAK C9H dump trucks operating in Indonesian coal mines (high ambient temperatures, severe dust, continuous corrugated roads) compared genuine 712-35710-0110 Spacer Ring Set against generic mild‑steel shim packs. The genuine rings showed zero thickness change, no corrosion, and maintained factory preload after 80,000 km of severe operation. Generic shims exhibited 0.05–0.12 mm permanent compression, leading to audible wheel bearing knock and four hub failures.
Vibration analysis confirmed 55% lower high‑frequency noise in hubs assembled with 712-35710-0110 due to uniform preload distribution. Fleet managers reported a 97% reduction in bearing‑related roadside events after switching to 712-35710-0110 Spacer Ring Set. Additionally, the QPQ coating eliminated rust on rings stored in humid parts rooms, whereas generic shims required oil‑bath storage.
In a controlled SITRAK test, a differential assembled with the 712-35710-0110 set survived 2.8 million torque cycles (alternating between full load and overrun) without any change in bearing preload. The set also passed a 500‑hour salt spray test (ASTM B117) without any red rust. For SITRAK fleets performing high‑mileage line‑haul or severe vocational operations, this spacer ring set guarantees that bearing preload stays exactly as set – no re‑torque, no end‑play, no surprises.
When sourcing, always verify the 712-35710-0110 laser engraving on each ring and the QR code on the case. Counterfeit rings often have rough edges, inconsistent thickness, and lack the QPQ black finish. Genuine 712-35710-0110 Spacer Ring Set includes a batch certificate and a tamper‑evident seal on the case.
Register your set within 30 days to activate the 2‑year warranty against manufacturing defects (does not cover improper selection or installation). For best results, always pair with genuine SITRAK bearings and seals. With correct installation, this spacer ring set will outlast the bearing components it spaces, delivering consistent preload for over a million kilometers. Trust the original – choose genuine 712-35710-0110 Spacer Ring Set for absolute driveline precision and durability.
Final verdict: The 712-35710-0110 Spacer Ring Set is the definitive solution for zero‑backlash bearing preload and maximum driveline longevity. Its case‑hardened 52100 steel, micron‑flat faces, and corrosion‑resistant QPQ coating deliver permanent preload consistency, eliminate end‑play knock, and prevent premature bearing failure. Reject generic shims that compress, rust, or score races. Choose authenticity. Choose 712-35710-0110 Spacer Ring Set – the backbone of your SITRAK’s rotational precision.
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