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The 06129902 rubber buffer roller is a vibration-damping component installed between the track chain assembly and paver main frame. This part absorbs impact loads generated as the machine travels over uneven base surfaces, milled pavement transitions, and road crowns. By isolating track vibration from the main frame, the buffer roller reduces structural fatigue on chassis welds, extends electronic sensor service life, and decreases vibration transfer to the operator platform and screed assembly. This component is a critical wear part for scheduled undercarriage maintenance on crawler asphalt pavers.
This buffer roller uses a chemically bonded rubber-to-steel construction, with natural rubber compound vulcanized directly to a precision-machined steel inner core. The steel core includes a precision-bored center hole for mounting pin installation, with tolerances held to ±0.05mm for proper press fit. Production follows ISO 9001 protocols, with each production batch undergoing destructive pull testing to verify rubber-to-steel bond strength exceeds 7MPa. JESTIN has manufactured this part number since 2017, with over 180,000 units supplied to heavy equipment repair facilities and fleet maintenance departments worldwide.
Parameter | Specification |
|---|---|
Part Number | 06129902 |
Product Name | Rubber Buffer Roller / Shock Absorbing Roller |
Overall Dimensions | 160mm × 70mm × 70mm |
Inner Bore Diameter | 25mm |
Rubber Outer Diameter | 70mm |
Steel Core Material | 45# carbon steel |
Rubber Compound | High-elasticity natural rubber blend |
Rubber Hardness | 70 ±5 Shore A |
Bond Strength (Rubber to Steel) | ≥7 MPa |
Unit Weight | 1.8 kg |
Operating Temperature Range | -20°C to 80°C |
Static Load Rating | 12 kN per roller |
Maximum Dynamic Load | 22 kN |
Compression Set (70°C × 22h) | ≤25% |
This buffer roller is a direct replacement for OEM parts on SANY, ABG, Vogele, Dynapac, CAT, and XCMG crawler asphalt pavers. It is typically replaced during complete undercarriage overhauls alongside the following components: track chain assemblies (part numbers 14272215 / 14280234), drive sprockets (part number RM80672983), carrier rollers, guide rollers, and track tension cylinders (part number 4720002952). Most paver models use 8-12 buffer rollers per machine, distributed along the track frame length.
Controlled testing on standardized test tracks shows these buffer rollers reduce frame vibration acceleration by 42% at typical paving speeds (5 m/min) compared to solid steel rollers. At the operator platform, measured vibration levels decrease from 4.2 m/s² to 2.4 m/s², meeting EU Physical Agents (Vibration) Directive 2002/44/EC exposure limits for 8-hour operation. Vibration transfer to the screed mounting points is reduced by 38%, which improves mat smoothness by reducing screed bounce during paving operations.
Under normal paving conditions (1000 working hours annually, primarily on prepared base surfaces), documented service life ranges from 1800-2200 working hours. Operations on milled surfaces with exposed rebar or aggregate protrusions reduce service life by approximately 30%. Fleet maintenance data shows that replacing buffer rollers on schedule reduces track chain bushing wear by 28% and sprocket tooth wear by 22%, compared to operating with degraded or failed buffer rollers.
Normal wear appears as uniform compression set and surface cracking on the rubber outer diameter. Replace rollers when rubber compression set exceeds 3mm (measured as permanent deformation after load removal), when radial cracks deeper than 5mm appear, or when rubber separates from the steel core. Failed buffer rollers cause metal-to-metal contact between track chain and frame, resulting in accelerated wear on all undercarriage components and visible scarring on the track frame mounting surface.
Position paver on level surface, lower screed to ground, and release track tension
Remove track chain guard panels to access buffer roller mounting points
Drive out existing mounting pins using brass drift and hammer
Inspect mounting bracket bores for wear or elongation; replace brackets if wear exceeds 0.3mm
Apply thin layer of anti-seize compound to new roller inner bore and mounting pin
Install new buffer roller, ensuring rubber contact surface faces track chain
Drive mounting pin fully into position and install retaining clips
Re-tension track to manufacturer specification (typically 15-20mm sag mid-span)
Reinstall guard panels and verify no binding during slow track rotation
Inspect buffer rollers every 250 working hours for cracks, bond separation, or excessive compression
Check mounting pin retention during each undercarriage inspection
Replace all buffer rollers on one track frame simultaneously to maintain uniform load distribution
Do not use petroleum-based lubricants on rubber surfaces, as these cause rubber degradation
Minimum order quantity is 8 pieces (standard set for one track frame). Standard delivery for stock orders is 3-5 working days. Production lead time for orders over 100 pieces is 7-10 working days. Bulk orders of 50 pieces or more include complimentary mounting pin kits and thread locking compound. All units are individually packaged with production date and batch number for traceability.
This product includes a 12-month warranty against defects in materials and workmanship from date of installation. Warranty covers rubber-to-steel bond failure, premature rubber cracking outside normal wear parameters, and dimensional out-of-tolerance conditions. Warranty does not cover damage from improper installation, track misalignment, operation outside specified load limits, contact with chemical solvents, or normal wear and tear.
Visual indicators include radial cracks deeper than 5mm, visible separation between rubber and steel core, or permanent flat spots on the rubber surface greater than 3mm. Operational indicators include increased operator platform vibration, unusual clunking noises from the track area during travel, or accelerated wear on sprocket teeth and track bushings.
For undercarriage maintenance, replace all rollers on one track frame as a set. Mixing new and worn rollers causes uneven load distribution, which accelerates wear on new rollers and creates uneven track tension. Replacing complete sets also reduces the frequency of undercarriage service intervals.
No. The rubber buffer roller is a maintenance-free component. The inner bore uses a plain bearing surface designed for dry operation with the mounting pin. Do not apply grease or oil to the rubber outer diameter, as petroleum products cause rubber swelling and premature failure.
This specific compound is formulated for asphalt paver operating temperatures. For cold milling machines which operate in higher debris and impact conditions, request our polyurethane buffer roller variant with higher cut and tear resistance.
When stored in original packaging in a cool, dry environment away from ozone sources (electric motors, transformers) and direct sunlight, shelf life is 48 months from production date. Production date codes are laser-etched on the steel core end face for traceability.
