Description
The 12B-G2 Rubber Top Chain is a medium-duty conveyor roller chain with vulcanized rubber pads bonded to the outer surface of each link. Manufactured to ISO 606 / DIN 8187 dimensional standards from heat-treated alloy steel, it combines the load-bearing reliability of a precision roller chain with the cushioned, non-slip grip that delicate workpieces demand. It is the standard choice for woodworking conveyors, glass processing lines, ceramics kilns, plywood presses, and composite board production — any environment where a bare metal chain would scratch, mark, or vibrate the product being conveyed.
Two rubber compound options — NBR (nitrile, oil-resistant) and NR (natural rubber) — are available in Shore A 65–75 (standard handling) or Shore A 75–85 (higher load / higher speed). Both are vulcanized directly onto the chain link during manufacture, not adhesive-bonded, for permanent pad retention across the chain’s full service life.
Chain Dimensions
Attachment dimensions: A = 39.10 mm · B = 36.00 mm · Plate thickness T = 1.85 mm · Tolerances per ISO 606 / DIN 8187
Full Specifications
Key Features & Benefits
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Noise & Vibration Reduction Vulcanized rubber pads absorb impact and dampen vibration at every product contact point. Measurably quieter than bare metal chains — critical for enclosed woodworking halls and glass processing facilities where OSHA noise thresholds apply. |
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Surface & Workpiece Protection Rubber pads prevent metal-on-product contact, eliminating scratches and pressure marks on finished wood panels, glass sheets, and ceramic tiles. Essential wherever surface quality is a downstream quality KPI. |
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High Tensile Strength — 57.8 kN Solid roller construction and heat-treated alloy steel components deliver a minimum breaking load of 57.8 kN (13,136 lbf). Engineered for continuous conveying under sustained load, not just peak-rated performance. |
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Precision Manufacturing Manufactured to ISO 606 tolerances with shot-peened pins and plates for improved fatigue life. Roller and pin clearances are held to tight dimensional limits to ensure smooth, low-vibration sprocket engagement through the chain’s full service life. |
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Dual Rubber Compound Options NBR compound resists oil, fuel, and hydraulic fluid contact — ideal for lubricated conveyor environments. NR compound provides higher elasticity and better low-temperature performance. Both are available in two hardness grades to match your load and speed profile. |
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Direct Sprocket Compatibility Designed to pair with standard 12B sprockets or matching 12B rubber-tooth sprockets (rubber-inlaid teeth reduce engagement noise by a further 3–5 dB). Sprockets available in pilot bore and finished bore configurations. |
Where It’s Used
Primary Industries & Applications
🪟 Glass Manufacturing
🏺 Ceramics Processing
🪵 Plywood Presses
📦 Packaging Lines
🍶 Food & Beverage
🚗 Automotive Assembly
Installation Guide
Clean Sprockets & Chain
Use a mild solvent to clean all sprocket faces and chain link surfaces. Dry completely before installation — oil or grease contamination compromises rubber pad adhesion and accelerates delamination over time.
Verify Sprocket Alignment
Use a straightedge or laser alignment tool to confirm both sprockets are co-planar. Angular and parallel misalignment are the leading causes of premature rubber pad cracking and accelerated side-plate wear.
Route & Install the Chain
Start routing from the smallest sprocket, working toward the drive sprocket. Keep the chain taut as you work — do not force links over teeth. If you feel resistance, recheck that the pitch matches the sprocket specification (12B = 19.050 mm).
Set Correct Tension
Target 2–3% sag over a free span using a chain tensioner. Over-tensioning accelerates pin and bushing wear; under-tensioning causes skipping under load and increases shock loading on the rubber pads.
Lubricate — Correctly
Apply a light chain oil to the pin-bushing interface only. Do not lubricate the rubber pad surfaces — oils and greases degrade rubber compounds and reduce grip on the conveyed product.
Maintenance Interval Recommendation
Inspect rubber pads every 500 operating hours for cracking, chunking, or delamination. Replace the chain section when rubber hardness falls below Shore A 55 (oil/heat aging) or pad height loss exceeds 2 mm. Retain worn sections for supplier warranty assessment.
Matching Sprockets
We supply matching 12B rubber-top sprockets engineered to mesh precisely with the 12B-G2 chain. The sprocket tooth profile follows ISO 606 Series B geometry; rubber inserts between teeth absorb engagement shock and reduce meshing noise by a further 3–5 dB versus standard metal sprockets.
Get a Quote
Request 12B-G2 Chain Pricing & Samples
To receive an accurate quotation, please include the following in your enquiry:
Rubber compound (NBR / NR)
Hardness grade (65–75 / 75–85)
Material (alloy steel / SS316)
Surface treatment
Required quantity
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