Description
Rubber Top Chain — 12A-G2
12A-G2 rubber top chain extends the rubber contact width to the full ANSI #60 outer link plate on the A-series base — delivering the broad product support footprint required for large-format panels, wide cartons, and multi-pack containers on North American-standard conveyor equipment.
Product Overview
The G2 wider rubber profile on the ANSI 12A base serves the same purpose as it does on the ISO 12B base: broader product support, lower unit contact pressure, and improved lateral stability for products that are too wide for the G1 narrow profile to support without rocking. In North American packaging operations where cases run in portrait and landscape orientations and container widths vary across production runs, the G2 profile’s consistent wider contact footprint reduces the guide rail adjustments needed when changing between product sizes.
The 12A-G2 is particularly specified in facilities where the same conveyor handles multiple product sizes during a production day — the wider rubber surface accommodates the full range of product base widths without requiring chain replacement between product changeovers. This flexibility reduces planned downtime during product transitions and simplifies the conveyor’s design, since a single rubber top chain specification handles the full product mix rather than requiring different chain types for different product size ranges.
12A-G2 — G2 wide rubber top on ANSI #60 (A-series) base
Specification — 12A-G2
| Chain No. |
Pitch P (mm) |
Roller Ø (mm) |
Inner Width (mm) |
Pin Ø (mm) |
Pin Length (mm) |
Plate Depth (mm) |
Rubber W (mm) |
Rubber H (mm) |
Overall W (mm) |
Q min (kN) |
Weight (kg/m) |
| 12A-G2 |
19.050 |
11.91 |
12.57 |
5.94 |
24.71 |
18.00 |
52.0 |
12.0 |
62.0 |
31.3 |
1.60 |
Rubber top chain in production conveyor environment
Rubber Profile and Material Properties
The 12A-G2 rubber compound follows the same 75–80 Shore A NBR/SBR specification as 12A-G1, with the same food-grade and stainless steel options available. The wider G2 profile provides approximately 60% more rubber contact area per link compared to the G1 profile at the same pitch — this additional area reduces unit contact pressure proportionally, which extends the rubber profile service life in applications where products are heavy relative to the chain pitch. In food processing applications on stainless 12A-G2 chains, the wider rubber surface makes it easier to visually inspect the rubber profile for wear, discolouration, or delamination during routine sanitation checks — a practical hygiene advantage in HACCP-controlled environments.
Core Performance Advantages
🤚
Positive Non-Slip Grip
The vulcanised rubber surface grips product bases firmly at conveyor accelerations and on inclined sections where smooth-surface chains allow slippage — eliminating the positioning errors and product damage that result from uncontrolled sliding.
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Measurable Noise Reduction
Rubber’s damping properties absorb the micro-impacts at each sprocket link engagement, reducing conveyor operating noise at the product contact surface. In facilities with noise regulations, this can be a compliance factor.
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Surface-Safe Product Handling
Direct contact between bare steel chain and finished product surfaces causes scratching, denting, and marking. The rubber layer completely eliminates steel-to-product contact, maintaining surface integrity through the full conveyor run.
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Standard Sprocket Compatibility
The base chain dimensions are fully standard — the same sprockets used for the equivalent standard roller chain work without modification for the rubber top version. No hardware changes required for retrofitting.
Application Areas
Industrial conveyor application for 12A-G2
📦
Case and Carton Conveying
Mixed-size carton lines in North American distribution facilities use 12A-G2 for the broad rubber contact that accommodates carton width variation between SKUs without requiring separate chain specifications for each carton width.
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Large Wood Panel Finishing
Wide-panel wood product lines — 4×8 foot sheet material — require the G2 profile’s broader support for stable conveying through finishing and inspection equipment.
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Industrial Component Carriers
Machined component carriers and assembly fixtures with wide base plates are conveyed between production cells on 12A-G2 chains — the wide rubber contact prevents carrier tipping without requiring closely spaced side guides.
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Meat and Poultry Processing
USDA-compliant stainless steel 12A-G2 chains with food-grade rubber are specified for meat portion and tray conveying in North American food processing plants requiring FDA and USDA material compliance.
Rubber top chain on production line
Related Components We Supply
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Matched Sprockets — ANSI #60 (A-series)
Standard sprockets in the pitch matching 12A-G2. No special tooth form needed — standard ANSI #60 (A-series) sprockets engage rubber top chains correctly at the roller-to-tooth interface.
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Rubber Top Connecting Links
Connecting links with matching rubber top profile for a smooth, uninterrupted conveying surface at the chain join point.
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Replacement Rubber Top Outer Link Sets
Individual outer link plate assemblies with vulcanised rubber profiles for field repair of worn sections without replacing the full chain.
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UHMWPE Guide Rails
Low-friction polyethylene guide profiles reducing lateral wear on rubber edges in side-guided conveyor configurations.
Customer Reviews
★★★★★
“We run a mixed-SKU carton line where case widths vary from 200mm to 450mm. 12A-G2 handles the full width range without any guide rail adjustment between SKUs — significant time saving on our 6-changeover-per-day schedule. Chain quality is consistent and the rubber hasn’t shown any delamination in 20 months of operation.”
R
Robert Chen
Facilities Engineer — Toronto Packaging Plant
★★★★★
“Running stainless 12A-G2 with food-grade rubber on our pork portion conveyor. The USDA material documentation was complete and passed our third-party audit without corrective actions. The wider rubber surface makes visual inspection during sanitation checks much easier than the G1 profile.”
S
Sandra Johnson
Quality Manager — Atlanta Food Processing Facility
★★★★★
“Specified 12A-G2 for our machined component carrier conveyor. The wide rubber base prevents carrier tipping at our transfer points — we tried G1 first and had tipping problems with our wider carriers. G2 solved it completely. Two years in service, no issues.”
D
David Park
Plant Engineer — Los Angeles Automotive Parts Mfr.
Frequently Asked Questions
What is the width difference between 12A-G1 and 12A-G2?+
On the ANSI #60 base: 12A-G1 has approximately 32mm rubber width; 12A-G2 has approximately 52mm rubber width — a 20mm increase. The overall chain width (across the rubber profile) increases from approximately 42mm for G1 to 62mm for G2. This 20mm additional rubber width increases product contact area by approximately 60%, reducing unit contact pressure proportionally for the same product weight.
Does 12A-G2 require different sprockets from 12A-G1?+
No — both G1 and G2 use the same ANSI #60 base chain and run on standard ANSI #60 sprockets. The rubber profile on the outer link plates does not affect sprocket engagement. However, G2 chains are wider overall than G1 chains — ensure that conveyor frame clearances, guide rail spacing, and drive housing openings accommodate the 62mm overall width of the G2 profile before retrofitting G1 systems to G2.
Can 12A-G2 handle product weights up to 50kg per contact point?+
The rubber compression limit for 75–80 Shore A NBR at 12A-G2 profile dimensions (52mm × 19mm per link contact) is approximately 25–30 kg per link contact point before permanent rubber deformation begins. For products weighing above this, the longer contact length (using a slower conveyor speed so more chain links are under the product simultaneously) or a harder rubber compound (90 Shore A) should be specified. Contact us with your product weight and conveyor geometry for a specific load assessment.
Is 12A-G2 available in a self-lubricating version?+
Yes — 12A-G2 with oil-impregnated sintered bushings (SLR self-lubricating) is available. The rubber top profile is unchanged; the modification is in the bushing material. SLR versions are appropriate for enclosed machinery and food processing conveyors where external lubrication at the pin-bushing interface is impractical. Note that self-lubricating chains are not re-lubricated in service — replace when the elongation limit is reached.
Are there minimum order quantities for food-grade stainless 12A-G2?+
No minimum order applies for standard food-grade stainless 12A-G2 chains in stock lengths. For custom rubber compound specifications or custom attachment configurations, a minimum of 5 metres per specification applies. Food-grade compliance documentation (material certificate, FDA declaration, H1 lubricant data sheet) is provided with every food-grade order at no additional charge.
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Send us your chain specification and annual volume. Standard enquiries receive a quotation within 2 business days.
Further reading: ANSI vs ISO roller chain standards explained.
