Quzhou Horbon Mining Parts Co., Ltd. is one of the leading manufacturers and suppliers of labyrinth cover in China. With abundant experience, we are committed to providing high quality customized service and OEM service to global clients. Welcome to buy advanced labyrinth cover made in China here from our factory. Contact us for quotation.
Introduction
On a jaw crusher running in a quarry or mine, the eccentricity shaft's bearing housings sit right in the path of rock dust, splash water, and abrasive fines. A Labyrinth Cover is the non-contact sealing component fitted around that bearing housing - its job is to keep contamination out of the bearing chamber while holding grease in, without the rubbing friction and wear that a lip seal would introduce.
Horbon produces this component as an exact-fit, OEM-compatible replacement for jaw crusher eccentricity shaft assemblies, cast and machined from the same wear-grade alloy steel used across our crusher spare parts range. Whether you're doing a full shaft rebuild or simply stocking spares ahead of scheduled maintenance, the part is supplied factory-direct and dimensioned to match the bearing housing and cover positions on the original assembly drawing.
Key Advantages
Non-contact sealing geometry – a series of grooves rather than a rubbing lip, so it resists dust and slurry ingress without wearing down the way a rubber seal does.
Wear-grade materials – produced in high manganese steel or chrome-moly alloy steel, selected to match the working condition and drawing requirement.
Precision manufacturing – precision casting, CNC machining, and heat-treatment quenching combine to hold the fit tolerance needed against the bearing housing.
In-process quality control – every batch goes through raw material spectral testing, HRC hardness testing, three-coordinate dimensional inspection, and flaw detection before it ships.
Flexible ordering – buy it alone for a targeted repair, or as a matched set with the bearing housing, seal ring, and fasteners for a complete rebuild.
OEM part matching and reverse engineering – send your OEM part number, drawing, or even a worn sample, and our team can match or remodel it.
Factory-direct pricing – no trading-company markup; MOQ starts at 5 pieces with a 15–30 day production lead time.
Applications
This part is used across jaw crusher eccentricity shaft assemblies in:
Aggregate quarries running continuous primary or secondary crushing
Metal ore mining sites with heavy dust and moisture exposure
Mobile and portable crushing plants working in variable outdoor conditions
Maintenance workshops stocking spares for scheduled bearing housing overhauls
Parts Assembly Reference
|
Item |
Detail |
|
Component |
Labyrinth Cover |
|
Used on |
Jaw crusher eccentricity shaft / bearing housing assembly |
|
Material |
High manganese steel or chrome-moly alloy steel (per drawing) |
|
Process |
Precision casting + CNC machining + heat treatment quenching |
|
Seal type |
Non-contact, multi-groove labyrinth |
|
Quantity per assembly |
Varies by mounting side - 2 pcs on one side, 4 pcs on the other |
|
MOQ |
5 pieces |
|
Lead time |
15–30 days |
|
Trade terms |
FOB / CIF, shipped via Shanghai or Ningbo |
|
Customization |
OEM logo marking, custom material spec, reverse engineering from sample or drawing |
|
Exact dimensions |
Confirmed against your drawing or part number - contact us for a quote |
Questions Buyers Usually Ask
Q: 1. What does a labyrinth cover do on a jaw crusher?
A: It forms a non-contact seal around the eccentricity shaft's bearing housing, keeping dust, water, and crushed material out of the bearing chamber while retaining lubricating grease inside.
Q: 2. How is this different from a rubber lip seal?
A: It relies on a series of grooves and clearances instead of direct rubbing contact, so it doesn't wear out the way a rubber lip seal does, and it holds up better against dust and heat.
Q: 3. How often does it need to be replaced?
A: There's no fixed lifespan - replacement is condition-based. Check it during scheduled bearing housing maintenance and replace if the groove profile is worn, cracked, or if contamination is getting past the seal.
Q: 4. Can I order just this part, or do I need the full bearing housing set?
A: Either way works. Order it alone for a targeted repair, or as a matched set with the bearing housing and related fasteners for a complete rebuild.
Q: 5. Do you support custom material specifications?
A: Yes. Beyond our standard high manganese steel and chrome-moly alloy steel, our lab and smelting furnace can produce a custom alloy composition to a specified ratio if you provide the requirement.
Q: 6. I don't have a drawing - can you still make it?
A: Yes. Send the damaged original part, or clear measurements and photos, and our technical team can reverse-engineer and remodel it - typically turning around an initial 2D/3D drawing within a few days.
Q: 7. What is your minimum order quantity and lead time?
A: MOQ is 5 pieces, with a standard production lead time of 15–30 days depending on order volume and customization requirements.
Q: 8. What happens if the part I receive has a quality issue?
A: Horbon provides free replacement for confirmed quality issues, along with installation guidance documents and video/photo technical support.
Q: 9. Can you put our company logo on the parts?
A: Yes - we support laser logo marking on crusher spare parts, including this component, bearing housings, and related items, for OEM and private-label buyers.
Q: 10. Do you keep stock, or is everything made to order?
A: We carry regular inventory on common items alongside made-to-order production, so lead time can vary - confirm current stock status with our team when you inquire.
Get a Quote
Send us your OEM part number, drawing, or a photo of the worn part, and our team will confirm fit, material options, and lead time. Submit an inquiry through the form below and we'll follow up with a factory-direct quote.
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