Undercarriage Role
Drive Component
The drive component works with the applicable track chain as part of the wider undercarriage. Its teeth engage the chain to transmit drive through the track system.
Undercarriage Drive Components
Sprockets & Segments for Excavators & Bulldozers
FY Machinery brings together undercarriage manufacturing, our factory and international sales. Explore complete excavator sprockets and bulldozer sprocket segments, then confirm your part number, tooth count and mounting dimensions with our team.
Product & Terminology Guide
Drive sprocket and sprocket segment terms explained
At a high level, the drive sprocket engages the applicable track chain and transmits drive through the undercarriage. Clear parts terminology matters because a general sprocket description and one sprocket segment do not define the same supply scope.
General Parts Language
Sprocket / Drive Sprocket
Sprocket or Drive Sprocket may describe the undercarriage drive component in general buyer terminology. The term alone does not establish whether the actual arrangement is complete or segmented.
Segmented Configuration
Sprocket Segment
A sprocket segment is one section used in a segmented drive arrangement. It must not be treated as an unconditional synonym for a complete sprocket.
Two drive-component arrangements
Excavator Application
Excavator Sprockets
Excavators typically use a complete toothed sprocket disc. Confirm the machine model and part number, then tooth count, bolt-hole pattern, bore and key mounting dimensions against the drawing.
View Excavator Undercarriage PartsBulldozer Application
Bulldozer Sprocket Segments
Bulldozers typically use multiple toothed segments assembled around a complete circle. Confirm the model, part number or segment marking, teeth and bolt holes per segment, and drawing.
View Bulldozer Undercarriage PartsComplete drive component
Excavator Sprockets
Excavators typically use a complete toothed sprocket disc. Its tooth count, bolt-hole pattern and bore must match the specific mounting arrangement. The following references describe complete sprockets.
How to Identify an Excavator Sprocket
Machine Model → Part Number → Number of Teeth → Bolt Holes → Bore / Key Mounting Dimensions → Drawing
01
Machine model
Start with the complete machine make and model from the identification plate or machine records.
02
Part number
Share the sprocket part number from the existing part, parts book or a reliable purchase record.
03
Number of teeth
Count the teeth on the complete sprocket. A matching model name alone is insufficient.
04
Bolt holes & pattern
Count the bolt holes and measure their diameter. Include the hole-center circle or other mounting references where needed.
05
Bore & mounting dimensions
Measure the inner diameter and key mounting dimensions in mm; show the measurement points on a photo or drawing.
06
Drawing
Use the corresponding drawing for final dimensional confirmation. Special specifications require a drawing.
For a special specification, send the drawing at the start of the inquiry. Photos of the teeth, both faces, bore and mounting area help explain the request.
Type I / Type II dimension guide
Type labels distinguish the published side profiles; they are not manufacturing routes. Read A–J with the corresponding schematic and K as the bolt-hole pattern. Tooth and hole counts in the figures are illustrative; each specification row gives its actual counts.
FY dimension reference
Type I
Side profile and face view · Confirm the type and mounting profile on the specific drawing.
Side profile · A–I
Face view · J / K
FY original schematic · Not to scale · A: bore / inner diameter; D: bolt-hole center-circle reference; B / C / E / F: radial profile references; G / H: axial mounting-profile references; I: rim width; J: tooth-spacing reference. K specifies the bolt-hole pattern, while the number of teeth is a separate field. These figures explain the data letters; use the product drawing for exact measurement points and tolerances.
FY dimension reference
Type II
Side profile and face view · Confirm the type and mounting profile on the specific drawing.
Side profile · A–I
Face view · J / K
FY original schematic · Not to scale · A: bore / inner diameter; D: bolt-hole center-circle reference; B / C / E / F: radial profile references; G / H: axial mounting-profile references; I: rim width; J: tooth-spacing reference. K specifies the bolt-hole pattern, while the number of teeth is a separate field. These figures explain the data letters; use the product drawing for exact measurement points and tolerances.
Published reference data
Excavator Sprocket Specifications
All 14 references are retained in seven code families: 135 / 154 / 175 / 190 / 216 / 228 / 260. A family may include different types, bore dimensions or bolt patterns. Family numbers group the codes; use the actual J value shown in each row for dimensional comparison.
Weight in kg · A–J dimensions in mm · Bolt Pattern (K) = number of holes × hole diameter in mm (for example, 12×φ15 means 12 holes of 15 mm diameter) · No. of Teeth is listed separately.
135 Series · 1 reference
HWQ135-1AType I · 18.1 kg · 19 teethBolt pattern (K): 12×φ15
- A
- 230
- B
- 380.4
- C
- 423.2
- D
- 262
- E
- 294
- F
- 415.8
- G
- 16.5
- H
- 12
- I
- 45
- J
- 135
Bolt Pattern (K): 12×φ15 · No. of Teeth: 19
Dimensions in mm. Confirm the machine model, part number, tooth count, bolt pattern, bore dimensions and drawing before ordering.
154 Series · 2 variants
HWQ154-1AType I · 26.9 kg · 21 teethBolt pattern (K): 12×φ16
- A
- 265
- B
- 481.187
- C
- 535
- D
- 300
- E
- 339
- F
- 522.468
- G
- 12
- H
- 14
- I
- 38
- J
- 154
Bolt Pattern (K): 12×φ16 · No. of Teeth: 21
Dimensions in mm. Confirm the machine model, part number, tooth count, bolt pattern, bore dimensions and drawing before ordering.
HWQ154-2AType I · 25.8 kg · 21 teethBolt pattern (K): 12×φ15
- A
- 265
- B
- 481.187
- C
- 545
- D
- 300
- E
- 339
- F
- 522.468
- G
- 12
- H
- 14
- I
- 38
- J
- 154
Bolt Pattern (K): 12×φ15 · No. of Teeth: 21
Dimensions in mm. Confirm the machine model, part number, tooth count, bolt pattern, bore dimensions and drawing before ordering.
175 Series · 1 reference
HWQ175-1AType I · 37.0 kg · 21 teethBolt pattern (K): 15×φ18
- A
- 324
- B
- 547.4
- C
- 607
- D
- 364
- E
- 410
- F
- 593.714
- G
- 20
- H
- 15
- I
- 42
- J
- 175
Bolt Pattern (K): 15×φ18 · No. of Teeth: 21
Dimensions in mm. Confirm the machine model, part number, tooth count, bolt pattern, bore dimensions and drawing before ordering.
190 Series · 2 variants
HWQ190-1AType II · 55.0 kg · 21 teethBolt pattern (K): 22×φ17
- A
- 402
- B
- 584.72
- C
- 659
- D
- 440
- E
- 500
- F
- 644.6
- G
- 14
- H
- 26
- I
- 71
- J
- 190
Bolt Pattern (K): 22×φ17 · No. of Teeth: 21
Dimensions in mm. Confirm the machine model, part number, tooth count, bolt pattern, bore dimensions and drawing before ordering.
HWQ190-2AType II · 55.0 kg · 21 teethBolt pattern (K): 30×φ17
- A
- 402
- B
- 584.72
- C
- 659
- D
- 440
- E
- 500
- F
- 644.6
- G
- 14
- H
- 26
- I
- 71
- J
- 190
Bolt Pattern (K): 30×φ17 · No. of Teeth: 21
Dimensions in mm. Confirm the machine model, part number, tooth count, bolt pattern, bore dimensions and drawing before ordering.
216 Series · 3 variants
HWQ216-1AType II · 94.3 kg · 21 teethBolt pattern (K): 24×φ21
- A
- 435
- B
- 666
- C
- 740
- D
- 472
- E
- 590
- F
- 732.8
- G
- 9.5
- H
- 25
- I
- 87
- J
- 216
Bolt Pattern (K): 24×φ21 · No. of Teeth: 21
Dimensions in mm. Confirm the machine model, part number, tooth count, bolt pattern, bore dimensions and drawing before ordering.
HWQ216-2AType II · 99.7 kg · 21 teethBolt pattern (K): 20×φ26
- A
- 430
- B
- 666
- C
- 740
- D
- 480
- E
- 590
- F
- 732.8
- G
- 9.5
- H
- 25
- I
- 87
- J
- 216
Bolt Pattern (K): 20×φ26 · No. of Teeth: 21
Dimensions in mm. Confirm the machine model, part number, tooth count, bolt pattern, bore dimensions and drawing before ordering.
HWQ216-3AType I · 98.3 kg · 21 teethBolt pattern (K): 20×φ26
- A
- 430
- B
- 666
- C
- 740
- D
- 480
- E
- 590
- F
- 732.8
- G
- 25.5
- H
- 36
- I
- 87
- J
- 216
Bolt Pattern (K): 20×φ26 · No. of Teeth: 21
Dimensions in mm. Confirm the machine model, part number, tooth count, bolt pattern, bore dimensions and drawing before ordering.
228 Series · 3 variants
HWQ228-1AType I · 143.3 kg · 23 teethBolt pattern (K): 24×φ26
- A
- 408
- B
- 775
- C
- 855
- D
- 460
- E
- 716
- F
- 847.3
- G
- 27
- H
- 36
- I
- 90
- J
- 228.6
Bolt Pattern (K): 24×φ26 · No. of Teeth: 23
Dimensions in mm. Confirm the machine model, part number, tooth count, bolt pattern, bore dimensions and drawing before ordering.
HWQ228-2AType I · 122.5 kg · 23 teethBolt pattern (K): 40×φ22
- A
- 510
- B
- 775
- C
- 855
- D
- 550
- E
- 716
- F
- 847.3
- G
- 27
- H
- 36
- I
- 90
- J
- 228.6
Bolt Pattern (K): 40×φ22 · No. of Teeth: 23
Dimensions in mm. Confirm the machine model, part number, tooth count, bolt pattern, bore dimensions and drawing before ordering.
HWQ228-3AType I · 132.5 kg · 23 teethBolt pattern (K): 36×φ22
- A
- 460
- B
- 775
- C
- 855
- D
- 515
- E
- 716
- F
- 847.3
- G
- 27
- H
- 36
- I
- 90
- J
- 228.6
Bolt Pattern (K): 36×φ22 · No. of Teeth: 23
Dimensions in mm. Confirm the machine model, part number, tooth count, bolt pattern, bore dimensions and drawing before ordering.
260 Series · 2 variants
HWQ260-1AType I · 154.0 kg · 21 teethBolt pattern (K): 26×φ26
- A
- 585
- B
- 795
- C
- 893
- D
- 636
- E
- 739
- F
- 883
- G
- 35
- H
- 44
- I
- 114
- J
- 260.35
Bolt Pattern (K): 26×φ26 · No. of Teeth: 21
Dimensions in mm. Confirm the machine model, part number, tooth count, bolt pattern, bore dimensions and drawing before ordering.
HWQ260-2AType I · 270.0 kg · 25 teethBolt pattern (K): 30×φ29
- A
- 600
- B
- 958
- C
- 1057
- D
- 670
- E
- 870
- F
- 870
- G
- 35.5
- H
- 44
- I
- 115
- J
- 260
Bolt Pattern (K): 30×φ29 · No. of Teeth: 25
Dimensions in mm. Confirm the machine model, part number, tooth count, bolt pattern, bore dimensions and drawing before ordering.
Technical data is shown for dimensional comparison. Machine-model references are intentionally omitted because the source references are not exhaustive and do not define FY’s machine coverage. Final selection requires confirmation of the machine model, part number, tooth count, bolt pattern, bore dimensions and drawing.
Reference values are retained as supplied, including E = F = 870 mm for HWQ260-2A. Confirm these profile dimensions on the specific drawing before ordering.
Individual sections · assembled around a circle
Bulldozer Sprocket Segments
Bulldozers typically use multiple toothed segments assembled to form a complete circumference. A segment is an individual section. Confirm the requirements per segment and state whether the quantity is for individual pieces or complete sets.
Machine Model → Part Number / Segment Marking → Teeth per Segment → Bolt Holes per Segment → Drawing
Model, part number & marking
Start with the machine model and part number. Most segments carry an identification number or marking; send a clear close-up of any visible marking together with overall photos.
Count each individual segment
Confirm the teeth per segment and bolt holes per segment. Add hole diameter and key mounting measurements where available. Whole-circle counts do not replace the counts for each piece.
Confirm with a drawing
A drawing is the most reliable basis for checking the segment profile and mounting arrangement. Share it with the markings, photos, required pieces or sets and quantity.
Segment dimensions are confirmed by inquiry. No segment specification table is published here; the complete-sprocket data above does not describe individual segments.
Send Segment RFQ →Product Media
Sprockets & Segments Product Images
Machine Application
Excavator Drive Sprockets
Main Product View
Product Gallery
Product Details
Machine Application
Bulldozer Segments
Product Gallery
Product Details
Inspection Clues
When the drive area deserves a closer check
Visible or operating concerns can justify qualified inspection of the sprocket, sprocket segments, track chain, and related undercarriage components. These clues are not universal wear limits or replacement thresholds.
Follow the machine-specific service guidance and use qualified technical judgment. This overview is not a repair instruction or a substitute for inspection of the actual machine.
- Visible tooth wear or uneven contact patterns on the sprocket or sprocket segments.
- Damaged, cracked, broken, displaced, or otherwise visibly affected areas.
- Irregular engagement between the drive component and track chain during movement.
- Unusual contact marks, noise, or interference around the chain and drive area.
- Looseness where observable at the mounting or segment interfaces.
- Misalignment, wobble, or other abnormal movement visible during operation.
Replacement-Part Matching
What to send for sprocket or segment identification
Similar-looking drive components can have different arrangements or interfaces. Send confirmed references instead of relying on appearance, terminology, or one detail alone.
Machine make and model
Provide the make and complete model designation shown in the machine records or on the identification plate.
Part number, if known
Share a reliable sprocket or segment part number from the existing part, parts book, drawing, or previous purchase record when available.
Overall and close-up photos
Send clear overall views plus close-ups of the teeth, mounting or interface areas, markings, and any visible damage or wear.
Requested measurements and interfaces
For a complete sprocket, send tooth count, bolt-hole count and diameter, bore and key mounting dimensions. For a segment, send teeth and bolt holes per piece plus its marking. Show measurement points and units; include the drawing, especially for special specifications.
Complete sprocket or segments
State whether the request is for a complete sprocket or one or more sprocket segments, and identify the required segment quantity where applicable.
Related track-chain context
Provide the available track-chain or link reference, photos, and relevant undercarriage context so the drive interface can be reviewed as a system.
Required quantity
State the required quantity clearly and confirm whether it refers to complete sprockets, individual segments, or segment sets.
Manufacturing
Forged & cast sprocket products
Both forged and cast manufacturing routes exist for sprockets and segments. Confirm the route for the specific product specification during quotation and drawing review.
Type I and Type II describe the dimensional profiles in this guide. They do not identify whether a product is forged or cast. State any required manufacturing route with your part number or drawing.
B2B Supply Support
Sprocket production and order coordination
Our manufacturing and international sales teams review the specific sprocket or segment requirements together. Confirmed part references and drawings support product matching, quotation, production coordination and order follow-up.
Manufacturing-backed supply
FY Machinery brings together undercarriage manufacturing, our factory and international sales to review confirmed product and order requirements.
Product matching
Machine details, part references, photos, requested measurements or interface references, supply scope, chain context, and quantity are reviewed together.
Quality and order follow-up
Confirmed product references, quantities, and agreed order requirements support practical quality and order follow-up.
Production-site visit support
Production-site visits can be coordinated where appropriate to the product, order stage, and agreed arrangement.
Related Undercarriage Parts
Track Chains
Linked components that engage with the applicable drive arrangement.
Track Rollers
Lower rollers supporting and guiding the loaded chain path.
Idlers
Components guiding the track chain around the undercarriage.
Track Shoes
Ground-contact components mounted to the track links.
Complete Track Groups
A wider track-system supply scope requiring confirmation.
Buyer Questions
Sprocket & segment FAQ
What is an excavator sprocket?
An excavator sprocket is typically a complete toothed disc that engages the track chain to transmit drive. Confirm the machine model, part number, tooth count, bolt-hole pattern, bore and drawing for the specific component.
Is a drive sprocket the same as a sprocket?
In general parts language, Sprocket and Drive Sprocket may both describe the undercarriage drive component. The wording alone does not confirm whether the machine uses a complete sprocket or a segmented arrangement, so the actual component and references still need review.
What is a sprocket segment?
A sprocket segment is one toothed section. Bulldozers typically use several segments assembled to form a complete circumference. Confirm the part number or visible marking, teeth and bolt holes per segment, and drawing.
Is a sprocket segment the same as a complete sprocket?
No. A sprocket segment is part of a segmented arrangement, while a complete sprocket describes the complete drive component requested as one supply scope. Which arrangement applies depends on the machine and undercarriage configuration.
What information helps match a replacement sprocket or segment?
For an excavator sprocket, send the machine model, part number, tooth count, bolt-hole pattern, bore dimensions, photos and drawing. Special specifications require a drawing. For bulldozer segments, send the model, part number or segment marking, teeth and bolt holes per segment, photos, drawing and quantity in pieces or sets.
Request for Quotation
Send your sprocket or segment RFQ
Include the machine model, part number or segment marking, photos, tooth count, bolt-hole pattern, bore and key mounting dimensions, drawing and quantity. For segments, state teeth and bolt holes per piece and whether you need pieces or sets. Special sprocket specifications require a drawing. Add related track-chain references where available.