NICE Apollo 10021490 Limit Collar and Magnet Assembly for 3500 / 3501
The NICE Apollo 10021490 is a limit collar and magnet assembly used in the travel limit system on select Apollo Vanguard swing gate operators. The collar and magnet help the operator identify gate position so the system can stop accurately at the open and closed limits. When this assembly is loose, missing, damaged, or positioned incorrectly, the gate may overrun, stop short, fail to learn limits, or show inconsistent limit behavior.
This is a limit-sensing component, not a control board or full limit switch block. It should be matched to the original shaft-mounted limit collar/magnet assembly and the operator model. Some listings call out 3501 specifically, while broader product pages include 3500, 3501, 3600, and 3601 references. Verify the operator generation and parts diagram before ordering.
Compatible With
- NICE Apollo Vanguard 3500 swing gate operator references
- NICE Apollo Vanguard 3501 swing gate operator
- NICE Apollo Vanguard 3600 swing gate operator references
- NICE Apollo Vanguard 3601 swing gate operator references
- Select Apollo 3500 / 3501 column-mount swing gate service assemblies
- Limit systems using the 10021490 collar and magnet assembly
Features and Specifications
| Manufacturer | NICE Apollo |
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| Product Type | Limit collar and magnet assembly |
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| Part Number | 10021490 |
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| Application | Gate travel limit sensing |
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| Compatible Operator Type | Apollo Vanguard swing gate operators |
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| Mounting | Drive shaft / limit shaft mount, depending on operator diagram |
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| Notes | Positioning and orientation are critical for correct limit operation |
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Also Known As / Related Part Numbers
- 10021490
- NICE-10021490
- Apollo 10021490
- Limit collar and magnet
- Collar and magnet assembly
- 3501 limit collar
- 3500 limit magnet
- Vanguard limit collar
Technician Note
After replacing a limit collar or magnet, the gate limits should be checked through a full open and close cycle. Do not force the gate to run if it is overrunning the stop point.
Before Ordering
- Confirm the operator model and limit assembly layout
- Compare the old collar and magnet orientation
- Inspect limit switches or sensors for damage
- Check for loose shaft hardware or worn collars
- Reset or verify limits after installation as required by the operator
Professional Advisory
Limit adjustment affects gate travel and safety. If the gate is overrunning, hitting stops hard, or failing to stop reliably, have the system serviced before continued use.
Important Ordering Warnings
- Not the same as the 10024190 limit switch block
- Do not assume 3500 and 3600 versions are identical without diagram confirmation
- Incorrect magnet placement can cause travel-limit problems
Product Questions and Answers
What does the 10021490 collar and magnet assembly do?
It works with the operator limit system to help identify gate travel position on select Apollo Vanguard swing gate operators.
Which operators commonly use 10021490?
It is commonly listed with Apollo 3500, 3501, 3600, and 3601 Vanguard swing gate operator references.
Is this the complete limit switch assembly?
No. It is the collar and magnet assembly. The limit switch block is a separate part, commonly 10024190.
What symptoms can point to a bad or loose collar and magnet?
Symptoms can include gate over-travel, stopping short, erratic limit sensing, or limits that do not hold adjustment.
Should limits be checked after replacement?
Yes. The open and close limits should be checked through full travel after any limit-system part is replaced.
