Discover
From the modular bushing system to precision-machined C1045 steel construction, every feature of an HPE sprocket is engineered to simplify maintenance, reduce downtime, and maximize service life in demanding conveyor applications.
THE MODULAR ENGINEERING CLASS SPROCKET THAT KEEPS YOU RUNNING
HPE Engineering Class Sprockets eliminate long lead times with a proven modular design that fits over 50 engineering class chain styles. Replace worn sprockets faster, reduce downtime, and keep production moving!
- Modular bushing design ELIMATES long lead times. No more waiting on machine shops!
- Fits 50+ different engineering-class conveyor chains
- Replace the bushing, not the whole sprocket! Works with Q1, R1, or SK bushings, depending on tooth count
- Black oxide coated for a clean look and even better durability
- Hardened C1045 Steel teeth to resist wear and keep you running!
50+ styles, endless possibilites
Chains compatible with HPE Sprockets
HPE modular sprockets are designed to work with a wide range of industry-standard engineering class conveyor chains. Browse the compatible chain families below to find your chain style and match it with the right HPE sprocket.
50+
Compatible Chain Styles
6
Major Chain Families
3
Bushing Systems: SK, R1 & Q1
81X Chain Family
81X
81XH
81XHH
81XHD
81KD
81XHS
81XHT
81XRT
81XST
81X-UHMW
WH78 Chain Family
WH78
WH78HD
WH78XHD
WH78RB
H Series Chain Family
HB78
H74
H75
H775RT
H78LR
H78
H78A
H78B
H78SR
H79
S / SS Chain Family
S78
SS78
SS188
S188
SS578
88 / 882 Chain Family
88
882
MXS882
IS881
IS882
LXS881
LXS886
US881
LXS887
LXS882
US882
Specialty / Conveyor Chain Family
C188
BRH188
MW188RT
MSR1288
433-1/2
R588
RR588
R778
RR778
988
IS880
87R
488
XS578
US278R
578R
588R
Not sure which HPE sprocket fits your chain?
Contact our team and we’ll help verify compatibility before you order.
See HPE in Action
What are HPE Sprockets?
Learn about the HPE modular sprocket system, explore its key features, discover common applications, and see how interchangeable bushings help reduce downtime and simplify sprocket replacement.
✓ Modular design for faster sprocket replacement
✓ Built for engineering class conveyor applications, works with 50+ different chains
✓ Helps reduce downtime when production matters most
HPE SPROCKETS
USES SK BUSHING
HPE SPROCKETS
USES Q1 BUSHING
HPE SPROCKETS
USES R1 BUSHING
Standard HPE Sprockets ready for your application
HPE Sprockets Dimensions & Info
The chart below shows the standard HPE modular engineering class sprocket sizes. For additional sizes, custom sprockets, or help finding the right fit, contact us.
Compatible with SK, Q1, and R1 bushing systems
Standard sizes from 7-tooth through 20-tooth
Need a non-standard size? We can help source or build it.
| Part # | Tooth Count | Outside Diameter (D) | Pitch Diameter (P) | Bushing Type | (T) | (G) | (S) | (L) | (H) | (V) | (W) | (C) | (K) | (B) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 78-SK-7H | 7 | 6.375" | 6.010" | SK | 0.875" | 5.135" | 2.375" | 2.813" | 3.875" | -- | 1.25" | 3.313" | 0.335" | -- |
| 78-Q1-8H | 8 | 7.25" | 6.820" | Q1 | 0.875" | 5.945" | 3.875" | 4" | 5.375" | 1.125" | 2" | 4.625" | 0.75" | 4.187" |
| 78X-R1-9H | 9 | 8.125" | 7.630" | R1 | 0.875" | 6.639" | 3.875" | 4" | 5.375" | 1.125" | 2" | 4.625" | 0.75" | 4.187" |
| 78XR1-10H | 10 | 9.187" | 8.440" | R1 | 0.875" | 7.565" | 3.875" | 4" | 5.375" | 1.125" | 2" | 4.625" | 0.75" | 4.187" |
| 78X-R1-11H | 11 | 9.875" | 9.260" | R1 | 0.875" | 8.385" | 3.875" | 4" | 5.375" | 1.125" | 2" | 4.625" | 0.75" | 4.187" |
| 78X-R1-12H | 12 | 11.25" | 10.080" | R1 | 0.875" | 9.205" | 3.875" | 4" | 5.375" | 1.125" | 2" | 4.625" | 0.75" | 4.187" |
| 78XR1-13H | 13 | 11.687" | 10.9" | R1 | 0.875" | 10.025" | 3.875" | 4" | 5.375" | 1.125" | 2" | 4.625" | 0.75" | 4.187" |
| 78XR1-14H | 14 | 12.5" | 11.720" | R1 | 0.875" | 10.845" | 3.875" | 4" | 5.375" | 1.125" | 2" | 4.625" | 0.75" | 4.187" |
| 78XR1-15H | 15 | 13.75" | 12.55" | R1 | 0.875" | 11.675" | 3.875" | 4" | 5.375" | 1.125" | 2" | 4.625" | 0.75" | 4.187" |
| 78XR1-16H | 16 | 14.125" | 13.370" | R1 | 0.875" | 12.495" | 3.875" | 4" | 5.375" | 1.125" | 2" | 4.625" | 0.75" | 4.187" |
| 78XR1-17H | 17 | 15.5" | 14.2" | R1 | 0.875" | 13.325" | 3.875" | 4" | 5.375" | 1.125" | 2" | 4.625" | 0.75" | 4.187" |
| 78XR1-18H | 18 | 15.75" | 15.020" | R1 | 0.875" | 14.145" | 3.875" | 4" | 5.375" | 1.125" | 2" | 4.625" | 0.75" | 4.187" |
| 78XR1-19H | 19 | 16.625" | 15.85" | R1 | 0.875" | 14.975" | 3.875" | 4" | 5.375" | 1.125" | 2" | 4.625" | 0.75" | 4.187" |
| 78XR1-20H | 20 | 17.75" | 16.680" | R1 | 0.875" | 15.805" | 3.875" | 4" | 5.375" | 1.125" | 2" | 4.625" | 0.75" | 4.187" |
Scroll sideways to view all dimensions.
1045 Steel Construction
Manufactured from high-strength C1045 steel for excellent durability, hardness, and long service life in demanding conveyor applications.
Hardened Teeth
Precision hardened teeth help reduce wear, improve shock resistance, increase load capacity, and lower long-term operating costs.
Precision Machined
Manufactured to tight tolerances for smooth chain engagement, consistent performance, and even wear across all sprocket teeth.
Extremely Versatile
The modular design accepts compatible bushings, opening the door for a wide range of shaft sizes using stocked components.
Have any questions? Need some help?
Let us help find the Right HPE Sprocket for you
Whether you're replacing an existing engineering class sprocket, matching a specific chain, or selecting the proper bushing for your application, our power transmission specialists are here to help. We'll make sure you get the right HPE modular sprocket the first time.
Real people. Expert support. Fast answers.