HySecurity MX4369, SPROCKET, #40 ROLLER CHAIN, 24
The HySecurity MX4369 is a 24-tooth sprocket made for #40 roller chain drive sections used on select HySecurity gate operator assemblies. In the field, this is the type of part that should be replaced when the sprocket teeth are worn, hooked, chipped, loose on the shaft, or no longer keeping proper chain engagement. A worn sprocket can cause noisy travel, uneven gate movement, premature chain wear, drive slippage, or repeated chain adjustment complaints. Because sprockets are part of the mechanical drive path, correct tooth count, chain size, bore, keyway, shaft fit, and set-screw arrangement matter. This part should be matched to the HySecurity parts diagram and the original sprocket before ordering, especially on older units or operators that have had previous gearbox, drive, or chain conversions.
Compatible With
This HySecurity part should be matched by part number, operator model, operator generation, and the original parts diagram. Compatibility below is written carefully because similar HySecurity service parts may look close but use different mounting, ratings, wiring, or mechanical fitment.
- Select HySecurity SlideSmart DC drive assemblies where MX4369 is listed
- HySecurity gate operators using #40 roller chain and a 24-tooth sprocket in the matching drive location
- Select slide gate operator drive sections when the original sprocket label or parts diagram calls for MX4369
- Not a universal sprocket for all HySecurity slide, swing, barrier, or hydraulic operators
- Verify tooth count, chain size, bore, keyway, shaft diameter, and mounting hardware before ordering
Features and Specifications
| Manufacturer | HySecurity / Nice |
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| Product Type | Roller chain sprocket |
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| Part Number | MX4369 |
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| Chain Size | #40 roller chain |
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| Tooth Count | 24 teeth |
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| Application | Mechanical drive sprocket for select gate operator drive assemblies |
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| Compatible Operator Type | Select slide gate operators and drive assemblies when specified by parts diagram |
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| Included Components | Sprocket only unless otherwise stated |
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| Notes | Match tooth count, bore, keyway, and chain size before ordering |
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Also Known As / Related Part Numbers
- MX4369
- HYS-MX4369
- HySecurity MX4369
- Nice HySecurity MX4369
- 24T #40 roller chain sprocket
- 24 tooth #40 sprocket
Technician Note
If the chain is jumping, binding, or wearing quickly, inspect the chain, sprocket alignment, shaft condition, bearings, key/keyway, and chain tension together. Replacing only the sprocket may not solve the issue if the chain or mating sprocket is also worn.
Before Ordering
- Confirm the original part number is MX4369
- Confirm the chain size is #40 roller chain
- Count the original sprocket teeth and verify 24T
- Check bore, keyway, hub style, and set-screw location
- Inspect chain wear and related drive components before installing a new sprocket
Important Ordering Warnings
- Do not substitute a different tooth count unless the HySecurity parts diagram specifically allows it
- Do not assume #35, #41, #420, or other chain-size parts are acceptable replacements
- A damaged chain or misaligned shaft can quickly ruin a new sprocket
Professional Advisory
Mechanical drive work should be performed with the gate secured, power off, and stored movement energy controlled. If the operator has damaged drive parts or unsafe gate movement, have a qualified gate technician inspect the system.
Product Questions and Answers
What chain size is HySecurity MX4369 made for?
MX4369 is listed as a 24-tooth sprocket for #40 roller chain. The original chain and sprocket should still be checked before ordering.
Can I use MX4369 on any HySecurity slide gate operator?
No. It should only be used where the operator parts diagram, original sprocket, or service documentation calls for MX4369 or a matching 24T #40 sprocket.
What symptoms can point to a worn sprocket?
Common symptoms include chain jumping, rough movement, hooked or pointed teeth, chain noise, uneven travel, and repeated chain tension issues.
Is this sprocket the same as the chain?
No. MX4369 is the sprocket. Chain, master links, shafts, bearings, and related hardware are separate unless specifically included by the listing.
What should be checked before replacing this sprocket?
Check chain size, tooth count, bore, keyway, hub style, set screws, chain condition, and alignment with the mating sprocket.
