01
Mantle
Mantle
Mounted over the mainshaft and head, the mantle forms the varying chamber with the concaves. Confirm profile, segments, thickness, fixing and wear allowance for the full KB / BK model.
View the common part page →thyssenkrupp KB / BK gyratory crushers
Identify legacy KB gyratory and BK jaw-gyratory installations, the current FLS Pro range, wear parts, structural spares and dedicated maintenance tools.
OEM Equipment Reference
Identify spiders, liners, mainshafts and eccentrics from the installed machine
KB uses an annular feed opening; BK uses a jaw-gyratory arrangement with an enlarged opening on one side. This page brings together models, dimensions, wear and drive parts, materials and documented tools needed for spares supply.
KB / BKTwo legacy installation configurations
8Standard models in the OEM brochure
1600–3300 mmPublished KB feed-opening / mantle range
2022Mining Technologies became part of FLS
Standard Models and Key Dimensions
KB / BK models and principal identification dimensions
The table follows the thyssenkrupp gyratory brochure, supplemented by the FLS 2023 data sheet for KB 63-130 Pro. Weight and capacity depend on configuration and serve installation identification only.
| Standard model | Feed opening / mantle diameter | Principal drive and setting data | Reference machine weight |
|---|---|---|---|
| KB 54-67 | Feed opening 1370 mm; mantle 1700 mm | Up to 450 kW; eccentric approx. 137 rpm | Approx. 180 t |
| KB 54-75 | Feed opening 1370 mm; mantle 1900 mm | Up to 650 kW; eccentric approx. 137 rpm | Approx. 215 t |
| KB 63-75 | Feed opening 1600 mm; mantle 2030 mm | Up to 650 kW; eccentric approx. 137 rpm | Approx. 270 t |
| KB 63-89 | Feed opening 1600 mm; mantle 2260 mm | Up to 1000 kW; eccentric approx. 130 rpm | Approx. 332 t |
| KB 63-114 | Feed opening 1600 mm; mantle 2900 mm | Up to 1200 kW; eccentric approx. 127 rpm | Approx. 530 t |
| KB 63-130 / KB 63-130 Pro | Feed opening 1600 mm; mantle 3300 mm | Up to 1500 kW; OSS 170–300 mm | Approx. 495 t |
| BK 54-67 | One-sided opening 2640 × 1350 mm; mantle 1700 mm | Up to 450 kW; eccentric approx. 137 rpm | Approx. 175 t |
| BK 63-75 | One-sided opening 3080 × 1680 mm; mantle 1900 mm | Up to 650 kW; eccentric approx. 137 rpm | Approx. 209 t |
Do not identify KB / BK by appearance alone. Before manufacture confirm full model, Pro configuration, serial number, opening, mantle diameter, eccentric stroke, OSS, drawing and revision.
thyssenkrupp
Component Location Diagram
The numbers on the diagram correspond one to one with the rows below.
| No. | Component | Location | Applies to |
|---|---|---|---|
| 1 | Mantle | Conical crushing face around the central shaft | OEM family section; exact KB/BK dimensions not specified |
| 2 | Concave segments | Tiered working faces inside the left shell | OEM family section; exact KB/BK dimensions not specified |
| 3 | Main shaft | Central vertical shaft through the cone | OEM family section; exact KB/BK dimensions not specified |
| 4 | Main shaft suspension | Central support in the upper spider | OEM family section; exact KB/BK dimensions not specified |
| 5 | Countershaft | Lower horizontal shaft on the right | OEM family section; exact KB/BK dimensions not specified |
| 6 | Hydraulic support | Adjustment support beneath the central shaft | OEM family section; exact KB/BK dimensions not specified |
Wear Parts
Mantle, concave, spider and feed-area wear parts
Mantles, concaves, mainshaft sleeves, spider-arm shields, underside liners and top-shell wear plates are identified separately by position and linked to component and material pages.
02
Concave segment
Concave Segment
Segments inside the top shell form the chamber with the mantle. Check count, zonal profiles, backing gaps, support rings and adjacent interfaces together.
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03
Mainshaft protective sleeve
Mainshaft Protective Sleeve
This separate protective part fits outside the mainshaft; it is not the shaft itself. Confirm diameters, length, locating shoulders, removal direction and fit with the head separately.
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04
Spider arm shield
Spider Arm Shield
Shields cover feed-facing spider arms against falling-material impact and erosion. Confirm handedness, arm profile, overlaps, holes and wear direction from the spider design.
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05
Spider underside liner
Spider Underside Wear Liner
Located under the spider near the feed and chamber top, these require joint checks of profile, countersunk holes, handedness and mainshaft oscillation clearance.
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06
Top-shell and feed-area wear plates
Top Shell / Feed Area Wear Plate
These protect the top shell, hopper and adjacent feed chute. Identify by drop point, lump size, liner zones, holes, overlaps and maintenance access.
View the common part page →Spare Parts
Spider, mainshaft, eccentric, gearing and hydraulic spares
The mainshaft and protective sleeve are separate parts. Confirm spider, shaft and eccentric assemblies, gears, upper bushes and hydraulic adjustment by their own interfaces and materials.
01
Spider assembly
Spider Assembly
The spider carries the upper mainshaft support and defines feed passages. Standard ring, split-ring, bone-shaped and jaw-type designs differ in structure, weight, support and removal method; confirm the installed version.
View the common part page →02
Mainshaft assembly
Mainshaft Assembly
The mainshaft is the complete load-bearing shaft, separate from its protective sleeve. The assembly also involves the head, head nut, step-bearing interface and hydraulic support end.
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03
Eccentric assembly and bushing
Eccentric Assembly & Bushing
The eccentric drives mainshaft gyration and includes the body, inner bush, counterweight and supports. Confirm eccentricity, diameters, oil grooves, rotation direction and stroke setting by model.
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04
Bevel gear and pinion
Bevel Gear & Pinion
The OEM uses cyclo-palloid spiral bevel gearing. Confirm tooth counts, module, pressure angle, spiral hand, shaft angle, backlash and matching marks as a pair.
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05
Spider bushing and oil seal
Spider Bushing & Oil Seal
At the spider centre, these support upper-mainshaft movement. Check bore, length, oil grooves, clearance, lubrication and seal orientation with the shaft journal.
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06
Hydraulic adjustment assembly and piston seals
Hydraulic Adjustment & Piston Seal
Hydraulics support and raise/lower the mainshaft to set discharge gap, compensate wear and protect against overload. Check bore, stroke, pressure, seal grooves and step-bearing interface together.
View the common part page →FAQ
Frequently asked questions
Are equal-diameter KB and BK parts interchangeable?
No. BK has a jaw-gyratory structure with an enlarged one-sided opening, so its spider, housing, chamber and feed area differ from KB. Confirm full model, serial number and drawings.
Are the mainshaft and protective sleeve the same part?
No. The mainshaft is a large internal load-bearing forging; the sleeve is a separate protective part fitted outside it. Materials, dimensions, manufacturing and acceptance requirements differ.
Which OEM model details are listed on this page?
Existing internal tooth-cap records cannot reliably link numbers to specific KB / BK positions and drawing revisions, so no numbers are inferred. Establish the link after receiving nameplate or drawing.