667H Steel pintle chains

Min. Order: 100

Port: Qingdao, China

Production Capacity: 100000PCS/Month

Payment Terms: L/C, T/T, D/P, Western Union, Paypal, Money Gram

Standard: ISO/DIN

Construction: Simplex

Material: Carbon Steel、Alloy Steel（40Mn、45M）

Application:Agriculture, environmental protection, industry, and other fields .

Package: Carton, Pallet, Wooden Box, or According to Customer′s Request

Basic Info

Introduction

The 667H chain belongs to the Steel Pintle Chain, which is a type of conveyor chain designed specifically for medium to low speeds, heavy loads, and high wear environments. It is widely used in agriculture, environmental protection, and industry, and is known for its durability and ease of maintenance.

Its configuration

A strong pitch of 58.75mm, 3.2mm thick alloy steel chain plates, and a tensile strength of over 60kN - which means it can easily lift a weight of 6 tons. Whether in dusty quarries, highly corrosive salt trucks, or even high-temperature baked casting workshops, the 667H chain always maintains its straight spine and never retreats.

Its design

An open sales chain structure, allowing soil and debris to accumulate nowhere; The unique four corner riveting process ensures that the pin shaft never comes loose. More conveniently, when maintenance is needed, a hammer and a punch can be easily disassembled and replaced in just a few minutes.

The promise of 667H chain is to make heavy work no longer terrifying and ensure smooth transportation.

Parameter	Value	Description
Chain No.	667H
Pitch (P)	58.75 mm	Critical dimension, differs from 667X (57.15 mm)
Inner Plate Width (b1)	25.40 mm	Effective internal width of the chain
Pin Diameter (d2)	7.94 mm	Main load-carrying component
Plate Height (h2)	22.2mm	Physical height of the chain plate
Plate Thickness (T)	3.20 mm	Typical thickness; reinforced versions may be thicker
Ultimate Tensile Strength (Q)	42.30/9614	Maximum load before failure (approx. 4320 - 6120 kgf)
Average Tensile Strength (Q0)	46.5 kN	Factory inspection reference value
Weight per Meter (q)	1.87 kg/m	Used for calculating equipment load

Product Description

Advantage

1. High load-bearing capacity: With a high tensile strength of 60kN, it is sufficient to meet the scraper conveying needs of heavy materials.

2. Excellent fatigue resistance: The chain plate is made of high-quality alloy steel and has undergone heat treatment, making it less prone to fracture under alternating stress.

3. Easy maintenance: Simply equip with a hammer and punch to easily disassemble and replace chain links, without the need for special tools.

4. Adapt to harsh environments: The open structure is not easily clogged with materials, and the cast sprocket can tolerate certain deviations when matched with it.

5. High cost-effectiveness: Compared to engineering plastic chains, it has a longer lifespan; Compared to forging chains, the price is lower and the overall cost-effectiveness is excellent.

6. ISO standard manufacturing: strict quality control, good interchangeability, and can be installed interchangeably with similar products at home and abroad (such as PGN, SKF).

Core material selection

l Chain plate: It is usually formed by stamping medium carbon steel or alloy steel (such as 40Mn, 45Mn). Some high-end products use boron steel, which has good hardenability and toughness, and can improve hardness while maintaining impact resistance.

l Pin shaft: Made of alloy steel (such as 20CrMnTi, 40Cr), it is the most worn part and requires high surface hardness to resist abrasive wear.

Key manufacturing processes

1. Precision punching: The holes in the chain plate are processed using high-speed precision punching machines to ensure consistent aperture and positional accuracy, and to ensure precise chain pitch.

2. Carbonization/carbonitriding: The surface of the pin shaft is carburized to form a high hardness wear-resistant layer (HRC 58-62), and the core maintains toughness and impact resistance.

3. Quenching and tempering treatment: The chain plate undergoes overall quenching and high-temperature tempering to obtain a uniform tempered martensite structure with excellent comprehensive mechanical properties.

4. Quad Staking: Exclusive process technology that compresses and deforms the two ends of the pin shaft from four directions through a special mold, forming a "mushroom head" or flower shape, significantly improving the ability to prevent detachment, offsetting working stress with prestress, and extending fatigue life.

Surface Treatment

l Shot peening treatment: Strengthen the surface of the chain plate, generate compressive stress to resist fatigue cracks, and clean the surface at the same time.

l Rust proof coating: Provide galvanizing, Dacromet or blackening treatment according to the application environment to improve corrosion resistance.

Processing and Manufacturing Precision

l Size control: Following international standards, pitch deviation is usually controlled within ± 0.2mm, and chain length accuracy must meet the requirement that the deviation within 1 meter does not exceed the specified value (such as ± 1.6mm).

l Chain pre tensioning: Pretensioning treatment is carried out before leaving the factory to eliminate initial internal stress and reduce initial elongation during use.

l Flexible customization: supports the provision of multiple accessories (accessory chain plates) to meet different installation and transportation needs.

Wear and Maintenance

1.Common Failure Modes

Axle wear: accounting for about 70%, due to material (such as sand, gravel, fertilizer) entering the gap between the axle and the chain plate hole, abrasive wear occurs, resulting in pitch elongation.

Chain plate fatigue: accounting for about 20%, long-term overload or instantaneous impact can cause cracks or even fractures at the chain plate holes.

Corrosion and rusting: accounting for about 10%, chains without rust prevention treatment will rust and get stuck in salt trucks and fertilizer environments.

2.Wear quantification standard

The golden rule for whether a chain needs to be replaced is that it must be replaced when the total elongation exceeds 3% of the original length.

For 667H (P=58.75mm), measure 16 sections (theoretical length=16 × 58.75=940mm). When the measured length reaches 968.2mm or longer, it means severe wear and there is a risk of tooth skipping or even chain breakage.

3.Suggested maintenance cycle

Period	Maintenance Item	Standard / Requirement
Daily	Inspection: Listen for abnormal noise (clicking/clanking), check chain tension.	Chain sag should be less than 2% of the center distance.
Weekly	Lubrication: Spray high-viscosity penetrating lubricant or used engine oil (open chains do not require expensive enclosed gear oil).	Focus on lubricating the contact points between pins and plates; remove surface mud and debris.
Monthly	Tensioning: Adjust the tensioner or reduce the sprocket center distance.	Ensure proper sag on the slack side (typically 10-20 mm).
Quarterly	Measurement: Measure the length of 16 or 20 chain links.	Compare with original length and track elongation rate trend.

4.Lubricant selection recommendations

Preferred: Chain specific aerosol (containing MoS2 or graphite), with strong permeability and the ability to remove abrasive particles.

Emergency: Mix waste engine oil and diesel in a 1:1 ratio, brush and apply.

Avoid: Extreme pressure lithium grease (too viscous to penetrate the inside of the pin shaft and may adhere to sand and gravel, exacerbating wear).

Inquire Now

If you have any questions or needs about the product, please fill in the following form and we will contact you as soon as possible.