Description
High Strength Roller Chain 120HSP-00, engineered for Caterpillar and equivalent heavy-duty equipment. Pitch 38.10 mm (No.120), carbon steel construction with alloy steel pins, tensile strength 340+ kN, fatigue life exceeding 10 million cycles. Suitable for mining conveyors, construction machinery, and industrial drive systems.
High Strength Roller Chain 120HSP-00 for Caterpillar
The 120HSP-00 is a heavy-duty roller chain designed to match Caterpillar OEM specifications. It is built for drive and conveyor applications in mining, construction, and manufacturing environments where standard ANSI or ISO chains are insufficient. The “HSP” designation indicates a reinforced high-strength plate series, offering higher fatigue resistance and tensile strength compared to standard ANSI No.120 chain.
Chain plates are manufactured from 40Mn manganese steel and undergo a dedicated heat treatment process to achieve the required hardness profile. Pins are produced from 40CrNiMo or 42CrMo alloy steel, providing torsional resistance and resistance to bending fatigue under shock loading. Sleeves and rollers are made from 20Mn and medium-carbon steel respectively, with surface hardening applied to reduce wear at the pin-bushing and roller-sprocket interfaces.
This chain is a direct-fit replacement for Caterpillar equipment using the 120HSP or equivalent chain specification. It is also used in OEM and aftermarket applications across excavators, crawler dozers, draglines, and other heavy tracked or chain-driven machinery.
Specifications
Component Materials
Features
| High-Strength Plate Steel Outer and inner plates use 40Mn manganese steel with controlled heat treatment, giving higher fatigue strength than standard carbon steel plates used in ANSI No.120 chain. |
Alloy Steel Pins 40CrNiMo and 42CrMo pin materials provide resistance to bending and shear under cyclic shock loads — critical in mining and earth-moving applications. |
| Extended Fatigue Life Tested to exceed 10 million load cycles under rated working load conditions, reducing replacement frequency and unplanned downtime. |
Caterpillar-Compatible Dimensions Manufactured to match OEM dimensional tolerances for Caterpillar equipment, ensuring correct fit on existing sprockets without modification. |
| Cotter Pin Connection Uses a split pin (cotter pin) connecting link for secure field assembly, compliant with GB/T 91-86 standard. |
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Applications
Maintenance Guidelines
| Lubrication | Apply chain oil or grease to the pin-bushing interface at regular intervals. In high-temperature or contaminated environments, a sealed or O-ring variant may be more suitable. Dry running significantly reduces fatigue life. |
| Elongation Check | Measure chain pitch elongation at regular intervals using a chain wear gauge across a fixed number of links. Replace the chain when elongation exceeds 3% of nominal pitch length. |
| Sprocket Inspection | Replace worn sprockets when fitting a new chain. Running a new chain on a worn sprocket causes accelerated and uneven wear, significantly shortening service life. |
| Alignment | Confirm drive and driven sprockets are correctly aligned before installation. Misalignment places lateral loads on chain plates, increasing risk of plate cracking and premature failure. |
| Replacement Cycle | Follow the equipment manufacturer’s recommended replacement interval. In severe-duty environments, inspect more frequently and replace based on measured wear rather than calendar intervals alone. |
Compatible Sprockets
The 120HSP-00 operates with sprockets designed for ANSI No.120 pitch (38.10 mm). We supply matching sprockets in a range of tooth counts and bore sizes. Specifying the sprocket alongside the chain ensures correct tooth profile engagement and maximises the working life of both components.
About the Manufacturer
UK roller-chain-manufacturers.com Co., Ltd is a professional roller chain manufacturer supplying standard and engineered chain to industrial buyers in the UK, Europe, and international markets. Our product range covers ANSI, ISO, and application-specific chains for conveyor, drive, and agricultural use.
All chains are manufactured to dimensional standards and supplied with material certifications on request. We maintain stock of common sizes including the 120HSP series to support fast despatch for replacement and MRO requirements. Technical support is available for chain selection, sprocket matching, and lubrication recommendations.
Frequently Asked Questions
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