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DuraTrack 171mm pitch excavator track chain, 40 link assembly

DuraTrack Undercarriage

Excavator & Dozer Track Chains

Q: Can you supply a fully assembled track group rather than a bare chain?

Yes. Track groups are assembled to your chain and track shoe configuration in Astrak's own workshop before despatch.

Astrak supplies DuraTrack excavator and dozer track chains in pitches from 101mm to 260mm, for machines from 3 tonnes to 80 tonnes. Greased and sealed for excavators, oil filled SALT for dozers, all manufactured to OEM specification in ISO 9001 approved facilities.

Bare chains, assembled track groups or complete undercarriage
Next-working-day delivery from stock

Delivery & Returns

Place your order before 4.30pm and it will be despatched for delivery on the next working day. Excavator track chains carry an 18 month warranty. DuraTrack SALT dozer chains carry a 3 year, 3,000 hour warranty, whichever comes first.

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The DuraTrack Track Chain Range

Three track chain types that cover almost every tracked machine on site, from a 3 tonne mini excavator on welded groups to 80 tonne quarry plant.

Greased and sealed DuraTrack excavator track chain

Greased Excavator Chains

140mm to 260mm pitch

Grease filled and sealed. Polyurethane seals keep abrasive material out of the pin and bush, so the joint wears slowly and runs quietly. Greased chains typically last 20-30% longer than a dry track chain.

DuraTrack SALT sealed and lubricated dozer track chain

SALT Dozer Chains

Sealed And Lubricated Track

Oil filled, for dozers and heavy tracked plant. The oil cuts internal friction between pin and bushing, extending internal bushing life by up to 50% compared to greased and sealed chains.

Assembled Track Groups

Chain and shoes, built to order

All 101.6mm pitch chains come as track groups with the shoes welded on. Above that, groups are built to your own chain and track shoe configuration.

Track groups and shoes

Track Chains for Every Major Make

Chains, groups and shoes are supplied for excavators, dozers, crushers and screeners, drilling rigs, pavers and planers, tracked dumpers, skid steer loaders and crawler cranes. Choose a make below to see the chains listed by machine model. Not listed? Send the make, model and serial number and we will confirm.

Related undercarriage parts and guides:

How to Specify a Track Chain

Chain pitch	Typical machine	Lubrication	Master pin	Supplied as
101.6mm	From 3 tonnes	Dry	Easy fit	Welded track group. Can be shortened, not lengthened
Above 101.6mm to 135mm	Mini and midi excavators	Dry	Easy fit	Chain
140mm to 160mm	Midi excavators	Greased	Easy fit	Chain
171mm	Around 13 tonnes	Greased	Easy fit or press fit	Chain
190mm	Around 20 tonnes	Greased	Easy fit or press fit	Chain
228mm	Around 50 tonnes	Greased or SALT	Easy fit	Chain
Up to 260mm	Dozers and quarry plant to 80 tonnes	Greased or SALT	Easy fit	Chain

Scroll the table sideways to see every column.

No greased chain is made at 135mm pitch or below by any manufacturer. From 140mm pitch upwards, every Astrak chain is greased.

Easy fit or press fit master pin?

An easy fit master pin needs no specialist equipment to split or join the chain, so the job is safer and quicker on site. It is fitted to every DuraTrack chain as standard. A press fit pin is a tighter fit, matching the rest of the track pins, and requires a Track Press to fit the chain.

Rail and pin hardness

Rails are heat treated boron steel hardened to 48-56RC, up to 10mm deep on excavator chains and up to 13mm deep on SALT dozer chains. All pins and bushes are hardened to 55-60RC. Heavy-duty chains with a higher rail and larger bushes are available for some models.

Which way round the links go

Each link has a narrow side and a wide side. The wide side goes to the sprocket and the narrow side to the idler wheel, so when the machine travels forwards the wide side of the link hits the ground first.

When Does a Track Chain Need Replacing?

Internal pin and bush wear shows itself as chain stretch. Measure pin centres across four or five links against the new chain specification: on a 50 link chain, 1mm of pin wear plus 1mm of bush enlargement adds around 100mm to the overall length.

Stiff joints, or links that no longer articulate freely
Flat spots on the bush, a sign of an extremely worn chain
Excessive side rail wear or gouged rail corners, usually a shoe that is too wide or tension that is too tight
Bushing counterbore or pin boss deformation, worn pin ends, loose pins
The chain jumping the sprocket: worn sprockets, a broken track adjuster spring, worn track rollers or the wrong pitch

To get more life from the chain you have: the narrowest shoe that still gives adequate flotation, digging over the idlers rather than the sprockets, correct track tension, a clean undercarriage and as little reversing as possible. Excavator chains are designed to wear less travelling forwards.

Worn track chain pins and bushings, cleaned for inspection — Worn pins and bushings, cleaned for inspection

Track chain links showing internal wear and stiff joints — Internal wear showing as stiff joints

Chain bush with flat spots, a sign of an extremely worn track chain — Flat spots on the bush, an extremely worn chain

Why DuraTrack Track Chains Are the Operator's First Choice

Large Stock Availability

A complete range of DuraTrack track chains and groups held in stock to suit all makes and models of tracked machinery, maximising machine uptime.

Quality Approved

Manufactured to OEM specification in ISO 9001 approved facilities, with warranty rates of 0.3% to 2% across the range.

Fast Delivery

Place your order before 4.30pm and it will be despatched for delivery the next working day.

Warranty Backed

18 months on excavator track chains. Three years or 3,000 hours, whichever comes first, on DuraTrack SALT dozer chains.

BSI certified ISO 9001, ISO 14001, ISO 27001 and ISO 45001

Track Chain Services

Track chains supplied loose, or assembled into complete track groups to OEM specification in our own workshop, ready to fit.

New DuraTrack track chain fitted to an excavator

Exchange Track Group Service

Service exchange track groups are held in stock at all times for immediate despatch. We fit an equivalent track shoe to brand new chains, assemble the group in our purpose built workshop to OEM specification, deliver to site and collect the worn set.

How the exchange service works

Steel track chain replacement carried out on site

On-Site Fitting

Approved plant fitters replace chains, track groups and shoes at your depot or on site, so the machine stays where it is working. Full undercarriage rebuilds are carried out in our own fully equipped workshop by qualified service engineers.

Fitting and workshop services

Dozer Undercarriage Conversion

Complete conversion kits move a dozer from a CAT SystemOne or Komatsu System Plus undercarriage onto DuraTrack SALT chains, backed by a 3 year, 3,000 hour warranty. Fit the kit yourself with our step-by-step instructions, or we fit it for you with a 12-month labour warranty.

Dozer undercarriage

Track Chain Questions, Answered

How long does an excavator track chain last?

Wear life depends on the ground, the machine and how it is worked, so there is no single honest figure. What is measurable is the difference between chain types: a greased chain typically lasts 20-30% longer than a dry chain, and a SALT chain extends internal bushing life by up to 50% compared to a greased and sealed chain. Regular inspection and correct track tension will do more for wear life than any published hour figure.

What is the difference between a greased chain and a dry chain?

On a greased chain, grease is sealed inside the bushing so that it surrounds the pin. That removes the metal on metal internal wear which causes chain stretch. A dry chain has no grease, so it wears internally, stretches, and can rust and seize. Seized chains fuse together and become useless, a common failure on crushers and screeners. No manufacturer makes a greased chain at 135mm pitch or below.

What is a SALT chain?

SALT stands for Sealed And Lubricated Track: heavy-duty oil filled chains for dozers and heavy tracked plant. The oil reduces internal friction between the pin and the bushing, which extends wear life. The design uses cross-drilled pins with oil passages, machined oil reservoirs, polished and stepped bushings, and a rigid seal made up of a flexible load ring, a rigid seal ring and a thrust ring.

Which chain pitch do I need?

Pitch is the distance between pin centres, and the range runs from 101mm to 260mm. Use the table above as a starting point, then confirm it: send the machine make, model and serial number with the number of links in the chain, the number of grousers on the shoe and the track shoe width. We check that against our product reference guide before quoting.

Should I choose an easy fit or a press fit master pin?

An easy fit master pin needs no specialist equipment to split or join the chain, so the job is safer and faster on site, and it is fitted to every DuraTrack chain as standard. A press fit pin is a tighter fit, matching the rest of the track pins, and is available on 171mm and 190mm pitch chains.

Do you supply dozer track chains?

Yes. DuraTrack SALT chains cover dozers and heavy tracked plant, with a 3 year, 3,000 hour warranty, whichever comes first. We also supply full conversion kits to move a machine from a CAT SystemOne or Komatsu System Plus undercarriage onto DuraTrack SALT chains, with a 12 month labour warranty when we carry out the fitting.

Can you supply a fully assembled track group rather than a bare chain?

Yes. Groups are assembled to your chain and track shoe configuration in our own workshop. In the UK we also run an exchange track group service: exchange groups are held in stock at all times, so a set can be delivered to site and the worn set collected afterwards.

What warranty comes with a track chain?

Excavator track chains carry an 18 month warranty. DuraTrack SALT dozer chains, undercarriage components and conversion kits carry a 3 year, 3,000 hour warranty, whichever comes first, matching the OEM warranty period. Conversion kit fitting labour carries a separate 12 month warranty.

How quickly can you deliver a track chain?

Place your order prior to 4.30pm and it will be despatched for delivery on the next working day. Across the business, delivery reliability runs at 98% on time in full, with stock held across eight locations in Europe.

Do you supply chains for machines over 50 tonnes?

Yes. The range extends to 80 tonnes, with pitches up to 260mm. For anything at the top of that range, talk to the team first so we can confirm availability against current stock before you plan the changeout.

Get a Quote for a Track Chain

Send the machine make, model and serial number, with the link count and shoe width if you have them. We confirm the chain and pitch against our product reference guide, price it, and despatch from stock.

Speak to the Team

Getting the pitch and the master pin right first time saves a second visit. Technical advice comes at no additional cost.

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Testimonials

Trusted by machinery owners and dealers worldwide, our customers rely on Astrak for quality parts, expert support and lasting performance.

★★★★★

The speed of processing the order and delivery.

Daniel Fairer

Holcim Group Services Ltd

★★★★★

The service is great and Dean always delivers what he promises, quotes are quick and the response on delivery times is great.

Anthony Lane

Chippindale Plant

★★★★★

Very friendly and helpful staff. Very knowledgeable and gives great advice.

Dave Bible

Moss Civils

★★★★★

Ordered, on site, fitted and machine back in use within 24 hours. Great service, good communication and good paperwork.

George Hammersley

Roddenloft Estates