Quality undercarriage, buckets, hydraulics and wear parts, delivered on time
Home > Products > Dozer Undercarriage > Dozer Sprocket Segments
Forged DuraTrack bulldozer sprocket segment, held in US stock

DuraTrack Dozer Undercarriage, US Stock

Dozer & Bulldozer Sprocket Segments

DuraTrack sprocket segments for crawler dozers and track loaders, held in US stock and shipped the same day on orders placed by 4:00pm CT. Listed by make and model for CAT, John Deere, Komatsu, Case and Liebherr machines.

Each segment is forged and through hardened, with tooth profiles induction hardened to over 50RC, and built to OEM specification in ISO 9001 approved facilities. Sections of three or five teeth bolt on individually, so a worn section is changed without removing the track.

  • Held in US stock, same-day shipping on a 4:00pm CT cut-off
  • Grade 12.9 segment bolts shipped with the segments
  • Custom dozer track groups assembled in our Houston workshop
Shipping & Warranty
Order by 4:00pm CT and stocked segments ship the same day. DuraTrack sprocket segments come with a minimum 12-month warranty as standard; we confirm the term for your parts when we quote.

Sprocket Segments by Dozer Make

Segments are listed for more than 350 crawler dozer and track loader models, including the CAT D6, D8 and D9, John Deere 700, 750 and 850, Komatsu D61, D65 and D155, Case 650, 750 and 850, and Liebherr PR734 and PR736. Can not find your machine? Send the make, model and serial number and our team will confirm the segment.

More Dozer Undercarriage Parts from US Stock

DuraTrack dozer undercarriage, SALT chains

Dozer Undercarriage

Complete undercarriage and kits

SALT chains, track groups, rollers and idlers, supplied individually or as half and full kits.

Dozer undercarriage
DuraTrack SALT dozer track chain

Dozer Track Chains

Sealed and lubricated (SALT)

Oil filled, with internal bushing life up to 50% longer than a greased and sealed chain.

Dozer track chains
DuraTrack track group, chain with steel shoes fitted

Track Groups

SALT chain and shoes, assembled to order

Assembled to order in our Houston workshop and shipped ready to fit.

Track groups
DuraTrack single grouser dozer track shoe

Track Shoes

560mm to 915mm single grouser

Single grouser dozer shoes on heavy-duty baseplates, boron steel, through hardened.

Track shoes
DuraTrack dozer front idler with mounting bracket

Idlers

Front and rear, complete cast assemblies

Cast idler assemblies with heavy-duty seal groups, shafts and brackets.

Idlers
DuraTrack dozer bottom roller, double flange with mounting bracket

Track Rollers

Single and double flange

Forged roller shells, heat treated, on hardened shafts with heavy-duty seals.

Track rollers
DuraTrack dozer carrier roller

Carrier Rollers

Single flange, double flange and shaft type

Guide the track over the undercarriage frame, with reinforced flanges and heavy-duty seals.

Carrier rollers
Sprocket segments bolted together, with a segment bolt and nut

Undercarriage Hardware

Grade 12.9 and 10.9, metric and imperial

Track, segment and split master bolts to grade 12.9; sprocket and roller bolts to grade 10.9.

Undercarriage hardware

How to Identify Your Dozer Sprocket Segments

Segments change between models, and often between serial number ranges of the same model. Five details let our team confirm the right part before it ships.

What to checkWhy it matters
Make, model and serial numberSets the segment for the machine and the serial number range.
Teeth per segmentSegments come in sections of three or five teeth and the two are not interchangeable.
Bolt holes per segmentThe new segment has to match the bolt pattern of the one coming off.
Chain pitchThe segment pitch has to match the chain, or the bushings will not seat in the teeth.
Markings on the segmentAny numbers cast into the old segment are cross-referenced against our product reference guide.

Scroll the table sideways to see every column.

Also tell us whether the machine runs a standard undercarriage or a proprietary system such as Cat SystemOne or Komatsu PLUS.

Segmented sprocket or one-piece sprocket?
A one-piece sprocket is changed as a single unit. A segmented sprocket bolts on in sections of three or five teeth, so one worn section can be changed without taking the track off. Which type your machine takes is confirmed from the make, model and serial number before we quote.
Which bolt grade do segments use?
Segment bolts, track bolts and split master bolts are grade 12.9. Sprocket bolts and roller bolts are grade 10.9. All are forged from alloy steel and heat treated to OEM specification, in metric and imperial.

Sprocket Segment Wear: What to Look For

Hold an unused segment of the same type against the worn one. The original tooth profile is the part that has worn away, so a side by side comparison shows the loss more clearly than any measurement of the old part alone.

  • Hooked teeth that are no longer symmetrical
  • Sharp or pointed tooth tips
  • Track chain slipping or jumping the segments under load, which shock loads the final drive
  • Flat spots on the chain bushings where the teeth run
  • Packed material between the teeth stopping the bushings from seating

Running in reverse and in high gear speeds up segment wear, and so do track shoes wider than the job needs. Run the narrowest shoe that still floats the machine and keep the track at the correct tension.

Segments and chain set each other's wear rate. Measure both before you buy, so the parts are changed once and together. Our team will tell you what to measure.

Worn drive sprocket teeth on a tracked machine
Worn teeth, checked against an unused profile
Track chain bushing with flat spots from sprocket wear
Bushing flat spots where the teeth run
Drive sprocket engaging the track chain bushings
Teeth engaging the chain at the drive end

Why Buy DuraTrack Sprocket Segments in the US

Held in US Stock

Dozer sprocket segments held in US stock, with segment bolts and SALT chains to go with them, maximizing machine uptime.

Quality Approved

Forged, through hardened and built to OEM specification in ISO 9001 approved facilities.

Same-Day Shipping

Order by 4:00pm CT and stocked segments ship the same day.

Warranty Backed

Minimum 12 months on DuraTrack sprocket segments. Three years or 4,000 hours on DuraTrack SALT dozer chains, whichever comes first.

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

Bulldozer Sprocket Segment FAQs

What is a bulldozer sprocket segment?
A bolt-on section of the drive sprocket on a crawler dozer or track loader, with three or five teeth. The teeth engage the track chain bushings and turn the final drive into travel. DuraTrack segments are forged and through hardened, with tooth profiles induction hardened to over 50RC.
Do you stock dozer sprocket segments in the US?
Yes. DuraTrack dozer sprocket segments are held in US stock. Order stocked segments by 4:00pm CT and they ship the same day. If the segment for your machine is not in stock we confirm the lead time when we quote, before you commit.
Which dozer makes and models do you cover?
More than 350 crawler dozer and track loader models, including the CAT D6, D8 and D9, John Deere 700, 750 and 850, Komatsu D61, D65 and D155, Case 650, 750 and 850, and Liebherr PR734 and PR736. Send the make, model and serial number and we confirm the correct segment against our product reference guide.
How do I know my sprocket segments are worn?
Compare the segment with an unused one of the same type. Hooked or sharp teeth, flat spots on the chain bushings, or a chain that slips or jumps the segments under load all mean the segment is at or past its limit. Worn segments shock load the final drive, so replace or re-rim once the wear line reaches its limit.
Should I replace the segments and the track chain together?
Usually, if both are close to their limits. New segments on a stretched chain wear early, and a new chain on worn segments wears faster. A half kit covers the track groups, sprocket segments and segment hardware, so the chain and segments start from the same point.
Do you assemble dozer track groups in the US?
Yes. Custom dozer track groups are assembled to order in our Houston workshop, which has 4 track presses and also handles Cat SystemOne and Komatsu PLUS conversions. Same-day pickup and local delivery are available on many orders throughout greater Houston.
What warranty comes with dozer sprocket segments?
DuraTrack sprocket segments come with a minimum 12-month warranty as standard, and we confirm the term for your parts when we quote. DuraTrack SALT dozer chains carry a 3 year, 4,000 hour warranty, whichever comes first.

Request a Quote for Dozer Sprocket Segments

Send the machine make, model and serial number, with the number of teeth and bolt holes on each segment if you have them. We confirm the segment against our product reference guide, price it, and ship from US stock.

I understand that my personal data will be processed in accordance with the Privacy Statement.

Astrak undercarriage support specialist

Talk to the Team

Our team confirms the tooth count, bolt pattern and pitch before anything ships, so the right segment arrives first time. Technical advice comes at no additional cost.

Call Us

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