Spider Cap And Spider Arm Shield
Shields the spider bearing and arms from the feed passing over them
What This Casting Does And Why It Matters
On a cone crusher with a top-supported main shaft, the spider arms sit directly in the feed stream. The spider cap and arm shields are sacrificial castings that keep that feed away from the spider bearing and the arms themselves. If they are neglected the damage lands on structural castings rather than consumables. PangLei casts spider caps and arm shields in manganese and alloy steel for the cone models in our pattern inventory.
Technical Features
- Cast to the original geometry from pattern or 3D scan
- Austenitic manganese or alloy steel options
- Heat treated to the grade cycle
- Dimensional inspection report issued
What You Get That You Would Not Get Elsewhere
Keeps abrasive feed off the spider bearing housing
Protects structural spider arms with a replaceable casting
Cast in manganese or alloy steel to match the duty
Available with the rest of the cone spares package
The Failures This Part Is Cast To Prevent
- Feed eroding the spider bearing housing
- Structural spider arms worn where shields were never replaced
- Parts that are difficult to source for older cone machines
- Damage found only once the crusher is stripped
Who It Is For
- Operators of top-supported cone crushers
- Crusher rebuild workshops
- Mining plants running large gyratory style cones
- Spare part distributors
Application Scenarios
- Cone crusher overhauls
- Preventive spares holding for high tonnage plants
- Rebuilds of older machines
- Contract maintenance work
Technical Data For Spider Cap And Spider Arm Shield
Every figure here comes from our published foundry capability. Where a value depends on your machine it is confirmed at quotation rather than guessed.
| Specification | Detail |
|---|---|
| Part type | Spider cap, spider arm shield |
| Material options | Austenitic manganese steel, alloy steel |
| Fitment | Over the spider bearing and along the spider arms |
| Source geometry | Original pattern, customer sample or 3D scan |
| Heat treatment | To grade specification |
| Inspection | Chemical analysis and dimensional report |
| Packing | Steel pallet |
Manganese Grades Available For This Part
| Material | Mn % | C % | Si % | P % | S % | Cr % |
|---|---|---|---|---|---|---|
| Mn13 | 11-14 | 1.00-1.45 | 0.3-1.0 | < 0.06 | < 0.04 | — |
| Mn13Cr2 | 11-14 | 1.15-1.25 | 0.3-0.8 | < 0.06 | < 0.04 | 1.5-2.5 |
| Mn18 | 17-19 | 1.2-1.3 | 0.3-0.8 | < 0.06 | < 0.04 | — |
| Mn18Cr2 | 17-19 | 1.2-1.3 | 0.4-0.9 | < 0.06 | < 0.04 | 1.5-2.5 |
| Mn20Cr3 | 19-21 | 1.2-1.3 | 0.3-0.8 | < 0.06 | < 0.04 | 2.5-3 |
| Mn22Cr2 | 21-23 | 1.1-1.4 | 0.3-0.8 | < 0.06 | < 0.04 | 1.5-2.5 |
| Mn22Cr3 | 21-23 | 1.1-1.4 | 0.3-0.8 | < 0.06 | < 0.04 | 2.5-3 |
How This Casting Is Made
Pattern Making
Once drawings are confirmed, pattern making starts immediately in our own pattern shop. Thousands of finished patterns are already on the shelf, so repeat parts skip this step entirely.
Sandbox Making
Casting Process Simulation System (CPSS) is run before the moulds are made. The cavity is kept as solid and as clean as possible so that inclusions have nowhere to start.
Melting And Pouring
Charge materials are bought to a high standard and temperature is controlled through the whole pour to achieve a fine grain structure. Samples are taken to verify the analysis and adjusted if needed, then kept for at least three years for traceability.
Sandbox Opening
Also called casting cleaning. After initial cooling the box is opened, risers and runners are removed and the casting is cleaned. Cooling time is set by casting size, not by the clock.
Heat Treatment
Heating temperature is strictly controlled and castings are spaced in the furnace so they heat uniformly and meet the water fully. Quenching begins within 30 seconds of withdrawal from the oven.
Machining
After rectifying and polishing, castings are machined strictly to drawing for correct fitment. QC then carries out dimensional inspection and issues the dimensional inspection report.
Inspection
Our own physical and chemical laboratory covers spectrometry, hardness, microstructure, dye penetrant and dimensional inspection on site rather than at a third party.
Packing And Delivery
Finished parts are packed on steel pallets for forklift handling, to international standards for road, rail, sea and air transport.
Inspection Supplied With This Part
Chemical analysis and a dimensional inspection report are standard on every order. The remaining procedures are carried out in our own physical and chemical laboratory when specified at order stage.
| Procedure | When |
|---|---|
| Chemical Analysis | standard on every heat |
| Dimensional Inspection Report | standard on every order |
| Hardness Testing | if specified |
| Tensile Testing | if specified |
| Microstructure Analysis | if specified |
| Magnetic Particle Testing | if specified |
| Dye Penetrant Testing | if specified |
| Ultrasonic Testing | if specified |
Laboratory Equipment
- German-made OBLF direct-reading spectrometer
- Hardness testing equipment
- Metallurgical microscope
- Dye penetrant inspection equipment
- Dimensional inspection equipment
How This Part Compares With The Alternatives
| Compared With | What Changes |
|---|---|
| Running without arm shields | The spider arms themselves wear, and they are structural castings rather than consumables. |
| Fabricated shields | Cast shields in the correct wear alloy hold their shape and wear predictably where fabricated steel does not. |
| OEM supply | The same geometry, reproduced from pattern or scan, from a foundry with its own laboratory and inspection reporting. |
If Your Part Is Not Standard
With our own pattern shop, a 3D scanner and Casting Process Simulation System, we work from your drawing, your worn sample, or a scan taken on your site. Material grade, profile and machining are all specified against your machine rather than against a catalogue.
- Reverse engineering from a worn part, with no drawing required
- On-site 3D scanning where the component cannot be removed
- Material grade selected against your feed rather than a default
- Pattern retained afterwards, so repeat orders skip pattern making
Fitting And Getting The Life Out Of It
- Inspect the shields at every liner change
- Replace before wear reaches the arm casting
- Check the spider bearing seal condition while the cap is removed
- Record the tonnage between shield replacements
Spider Cap And Spider Arm Shield At The Foundry
Parts Usually Ordered Alongside This One
Main Shaft Assembly
Complete main shaft assemblies supplied to European customers
View Part →
Cone Crusher Burning Ring
The sacrificial ring that protects the head above the mantle
View Part →
Cone Crusher Mounting Plate
The seating plate between the crusher frame and the wear components above it
View Part →
Bowl Liner And Concave
The fixed half of the cone crushing chamber, cast in seven manganese grades
View Part →This Part In Real Orders
Spider Cap And Spider Arm Shield Questions
Which cone crushers use spider caps?
Machines with a top-supported main shaft. Send us the crusher model and we will confirm whether your machine is fitted with one.
Can you cast these without a drawing?
Yes, from the worn part or a 3D scan taken on your site.
What is the lead time?
Confirmed at quotation. It is shorter where we already hold the pattern for that model.
Are these parts supplied machined?
Where the original part has machined faces, ours are machined to match and inspected before despatch.
Get A Price For Spider Cap And Spider Arm Shield
Send the machine model, the part number if you have one, and the quantity. If you have neither, a photograph with the main dimensions is enough to start.