Description
Rubber Top Chain — 24B-G1
24B-G1 rubber top chain reaches the 38.1mm ISO pitch — one of the largest pitches in the standard rubber top chain family — delivering 160 kN minimum tensile capacity with G1 rubber top protection for the heaviest and most demanding non-marking conveying applications.
Product Overview
The ISO 24B-1 base chain at 38.1mm pitch provides 160 kN minimum tensile rating — nearly double the capacity of the 20B-G1 at the previous pitch step. At this scale, the applications are the largest and heaviest in the industrial conveying spectrum: extra-heavy granite and marble slabs above 1,000 kg, jumbo architectural glass panels for monumental facades, large-format engineered stone slabs, and heavy structural timber elements that exceed the load range of any smaller-pitch rubber top chain. The rubber top function remains unchanged — the G1 profile prevents surface marking, damps vibration, and provides non-slip product control — but the structural chain assembly now handles loads that would require multiple smaller-pitch strands if G1 rubber top chains were not available at this pitch.
In markets where very large natural stone formats are common — Brazil, India, Italy, Spain, China — 24B-G1 rubber top chains are a standard specification for the primary slab conveying equipment in large stone processing facilities. The same chain is also standard in the float glass industry for the largest glass lites handled in tempering and laminating equipment. At this pitch, the chain’s large outer link plate provides a proportionally wide rubber bonding area that ensures the G1 profile is securely retained even under the heavy product contact forces involved at these load levels.
24B-G1 — G1 narrow rubber top on ISO 24B-1 (B-series) base
Specification — 24B-G1
| 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) |
| 24B-G1 |
38.100 |
25.40 |
25.40 |
14.63 |
53.40 |
33.40 |
55.0 |
18.0 |
68.0 |
160.0 |
7.10 |
Rubber top chain in production conveyor environment
Rubber Profile and Material Properties
24B-G1 rubber top chains use 75–80 Shore A NBR compound as standard. At the 38.1mm pitch, the outer link plate is the largest in the standard rubber top range, providing exceptional rubber bonding area and delamination resistance. For stone processing at this scale, the 90 Shore A abrasion-resistant compound is strongly recommended — the heavy granite and marble slab weights combined with the rough undersurface texture of freshly-sawn slabs creates significant rubber abrasion at the contact interface. The harder compound extends rubber profile life by 50–80% in saw-cut slab conveying compared to standard 80 Shore A. Silicone compound for elevated temperature applications and food-grade NBR with H1 lubrication are available for specialised applications.
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.
🔇
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.
⚙️
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 24B-G1
🏔️
Extra-Heavy Granite and Marble Slabs
Slab formats above 3,200mm × 1,600mm at 30mm thickness in premium natural stone — some exceeding 1,000 kg — are the primary application for 24B-G1 rubber top chains in stone processing plants.
🪟
Jumbo Architectural Glass
Float glass lites above 6,000mm × 3,000mm for monumental building facades and structural glazing applications require the 24B pitch load capacity for safe conveying through furnace, press, and assembly areas.
🌲
Heavy Structural Timber
Glulam beams above 20m length and CLT panels in 200mm+ thickness are conveyed through production cells on 24B-G1 rubber top chains without surface marking on the visible timber face.
🏗️
Oversized Precast Elements
Extra-large architectural precast concrete panels for major civic and commercial buildings are conveyed on 24B-G1 chains where the panel weight and surface quality requirements are both at the maximum of what standard conveyor chains can handle.
Rubber top chain on production line
Related Components We Supply
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Matched Sprockets — ISO 24B-1 (B-series)
Standard sprockets in the pitch matching 24B-G1. No special tooth form needed — standard ISO 24B-1 (B-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 handle Botticino marble slabs up to 1,100 kg. At this weight, 24B-G1 is the only standard rubber top chain with adequate capacity. The 90 Shore A abrasion-resistant rubber is essential for the rough-sawn underside of our slabs — standard 80 Shore A was wearing out in 8 months. With 90 Shore A we get 18–22 months service life. Non-marking on our premium polished surfaces is perfect.”
R
Roberto Volpe
Operations Director — Verona Marble Processing (Largest Stone Plant in Region)
★★★★★
“Our jumbo glass line handles 8,000 × 3,000mm lites for high-rise facades. At 22mm glass thickness these lites are very heavy. 24B-G1 is the only standard rubber top chain at this load level. Zero surface marking in two years of operation. The ISO 24B base chain is the correct specification for our European-manufactured equipment.”
C
Carlos Salave’a
Plant Engineer — São Paulo Float Glass
★★★★★
“Cross-laminated timber beams at 18m length and 14 tonne weight are conveyed through our plant on 24B-G1 rubber top chains. The rubber top contact is critical for our architectural CLT where the wood surface is visible in the finished building. The chain capacity is comfortable at our panel weights and the chains have shown no delamination in 24 months.”
L
Lars Henriksen
Production Manager — Norwegian CLT Manufacturer
Frequently Asked Questions
What is the tensile capacity difference between 24B-G1 and 20B-G1?+
24B-G1 provides 160 kN minimum tensile versus 95 kN for 20B-G1 — a 68% increase. This capacity step is the reason for moving to the 24B pitch: applications where 20B-G1 chain approaches or exceeds 50% of rated load under the heaviest product conditions require the additional capacity that only the 24B pitch delivers in the standard rubber top chain range.
Is 24B-G1 available in stainless steel?+
Yes — 316L stainless steel 24B-G1 chains are available for corrosive environments. At this pitch, stainless is specified primarily for coastal or outdoor stone processing facilities and for chemical industry conveyors where the base chain must resist aggressive wash-down chemicals. Food-grade rubber compound with H1 lubrication is available simultaneously for food industry applications at this pitch.
What is the maximum conveyor incline angle for 24B-G1?+
For 24B-G1 with 75–80 Shore A NBR rubber, the maximum practical incline for heavy product conveying (above 300 kg per product) is approximately 10–12°, limited by the lateral sliding force that exceeds the rubber-to-product friction at steeper angles with heavy products. For lighter products relative to the chain’s load range, inclines up to 20° are achievable. For inclines above 15° with very heavy products, cleated rubber chain profiles are recommended over flat-top rubber chains.
Are attachment links available for 24B-G1?+
Yes — A1, A2, K1, K2, and EP (extended pin) attachment links in ISO 24B pitch are available for 24B-G1 rubber top chains. At this pitch, the most common attachment request is EP (extended pin) for cross-bar mounting on slab sorting and grading conveyors. Specify attachment type, interval, and total chain length when ordering attachment-equipped 24B-G1 chains.
What is the rubber profile overall width for 24B-G1?+
The G1 rubber profile width for 24B-G1 is approximately 55mm; overall chain width across the rubber profile is approximately 68mm. This is the widest standard G1 rubber top in the ISO B-series range. Verify conveyor frame and guide rail clearances for the 68mm overall width before installation.
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Further reading: sourcing heavy-duty roller chain directly from manufacturer.
