DuraTrack Dozer Undercarriage
Dozer Sprocket Segments
Astrak supplies DuraTrack sprocket segments for crawler dozers and tracked loaders, listed by make and model for CAT, Komatsu, John Deere, Liebherr and Case. Forged and through hardened for extended wear life, with tooth profiles induction hardened to over 50RC, all manufactured to OEM specification in ISO 9001 approved facilities.
Delivery & Warranty
Get a QuoteSprocket Segments for Every Major Dozer Make
DuraTrack segments are listed for more than 350 crawler dozer and tracked loader models: CAT from the D1 to the D11, including the D6, D8 and the 953 and 963 track loaders; Komatsu from the D40 to the D375, including the D61, D65 and D155; John Deere 700 to 950; Liebherr PR716 to PR764; and Case 550 to 1850. Shantui, Dressta and New Holland dozers are covered too. Not listed? Send the make, model and serial number and we will confirm.
Related Dozer Undercarriage Parts
Dozer Undercarriage
Complete undercarriage and kitsSALT chains, track groups, rollers and idlers, supplied individually or as half and full kits.
Dozer undercarriage
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
Track Groups
SALT chain and shoes, assembled to orderBuilt in our own workshops and delivered ready to fit.
Track groups
Track Shoes
560mm to 915mm single grouserSingle grouser dozer shoes on heavy-duty baseplates, boron steel, through hardened.
Track shoes
Idlers
Front and rear, complete cast assembliesCast idler assemblies with heavy-duty seal groups, shafts and brackets.
Idlers
Track Rollers
Single and double flangeForged roller shells, heat treated, on hardened shafts with heavy-duty seals.
Track rollers
Carrier Rollers
Single flange, double flange and shaft typeGuide the track over the undercarriage frame, with reinforced flanges and heavy-duty seals.
Carrier rollers
Undercarriage Hardware
Grade 12.9 and 10.9, metric and imperialTrack, segment and split master bolts to grade 12.9; sprocket and roller bolts to grade 10.9.
Undercarriage hardwareWhat Goes Into a DuraTrack Sprocket Segment
The segment teeth carry the full drive of the dozer into the chain bushings, under push, rip and turn loads. Material, hardness and fit decide how long that lasts.
| Feature | What it does |
|---|---|
| Forged segment body | Forged and through hardened for extended wear life. |
| Induction hardened tooth profiles | Hardened to over 50RC where the teeth engage the chain bushings. |
| Three or five tooth sections | Bolt on in sections, so one worn section is replaced without removing the track. |
| Pitch matched to the chain | The segment pitch has to match the chain, or the bushings will not seat in the teeth. |
| Grade 12.9 segment bolts | Forged from alloy steel and heat treated to OEM specification, in metric and imperial. |
Scroll the table sideways to see every column.
Every segment is matched to the make, model and serial number against our product reference guide. Parts are not interchangeable between models, or often between serial number ranges of the same model.
Segments or a one-piece sprocket?
What do I need to identify my sprocket segments?
Do I need new segment bolts?
When Do Sprocket Segments Need Replacing?
A sprocket segment cannot be measured against its own original tooth profile, because that is the part that has worn away. Compare it with an unused segment of the same type: lay the new profile against the old and the loss is clear. Replace or re-rim once the wear line reaches its limit.
- Teeth that have hooked over, so the tooth is no longer symmetrical
- Teeth that have gone sharp or pointed at the tip
- The chain slipping or jumping the segments under load, which shock loads the final drive
- Flat spots or heavy external wear on the chain bushings where the segment teeth run
- Material packing between the teeth, which stops the bushings seating and speeds up wear
Segment wear increases in reverse and in higher gears, so keep reversing and non-productive high speed travel to a minimum. Wide shoes increase bushing and sprocket wear: use the narrowest shoe that still gives adequate flotation, and keep the track correctly tensioned.
Segments and chain wear as a pair. New segments on a stretched chain wear early, and a new chain on worn segments wears faster, so measure both before changing either.
Why DuraTrack Sprocket Segments Are the Operator's First Choice
Large Stock Availability
DuraTrack dozer sprocket segments held in stock across eight stocking locations, with the chains and segment hardware to go with them, maximising machine uptime.
Quality Approved
Forged, through hardened and manufactured to OEM specification in ISO 9001 approved facilities.
Fast Delivery
Place your order before 4.30pm and it will be despatched for delivery the next working day.
Warranty Backed
Three years or 3,000 hours on all DuraTrack dozer undercarriage, sprocket segments included, whichever comes first, matching the OEM warranty period.
Dozer Sprocket Segment Questions, Answered
What is a dozer sprocket segment?
Which dozer makes and models do you cover?
How do I know when sprocket segments are worn?
Should I change the segments and the chain together?
What bolts do dozer sprocket segments use?
What warranty comes with dozer sprocket segments?
How quickly can you deliver dozer sprocket segments?
Get 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 despatch from stock.
Speak to the Team
Getting the tooth count and bolt pattern right first time saves a second visit. Technical advice comes at no additional cost.
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