Krupp KB/BK Series Gyratory Crusher
Krupp KB 54-67 / KB 63-75 / KB 63-89 / BK 54-67
About the Krupp KB/BK Series Gyratory Crusher
Gyratory crushers take the largest feed in the plant and run continuously, so the mantle and the concave segments inside the chamber are heavy sections that have to survive both impact and abrasion. The surrounding parts — spider cap, arm liners, rim liners and dust seal ring — protect the shell and the sealing surfaces.
Because a gyratory is normally the only primary machine on site, unplanned liner changes are expensive. Liner sets for this family are therefore usually ordered as a complete chamber rather than piece by piece.
Wear parts we supply for the Krupp KB/BK Series Gyratory Crusher
- Mantle (upper / lower) — Mn18Cr2 · Mn22Cr2 · Cr26
- Concave / bowl segments — Mn18Cr2 · Mn22Cr2 · Cr26
- Spider cap, arm liners, spider bushing — Mn13Cr2 / Bronze
- Rim liners, shell liners — Mn13Cr2
- Dust seal ring, seal retainer — steel / Bronze
- Bottom shell liners, eccentric wear parts — Mn13Cr2 / Bronze
Casting materials
| Material | Character | Typical use |
|---|---|---|
| Mn13Cr2 | Work-hardening manganese, good toughness | General quarry and recycling duty, cheek plates, chamber liners |
| Mn18Cr2 | Higher manganese, better resistance to heavy impact | Primary jaws, cone liners on coarse feed, gyratory mantles |
| Mn22Cr2 | Highest toughness of the manganese range | Large primary liners where impact is severe |
| Cr26 / Cr20 (high chrome) | High abrasion resistance, lower toughness | Blow bars, VSI tips and anvils, fine-crushing chambers |
| Bronze | Bearing grade, machined | Eccentric bushings, socket liners, thrust and step washers |
Material is chosen from the feed size, the rock type and the amount of uncrushable material in the stream — tell us how the current liners fail (worn out, cracked, or deformed) and we will match the grade.
How to order
- Send the machine model and part number, or your own drawing, measured sample or photos with dimensions.
- We confirm the profile, material and weight, then quote — FOB Ningbo or Shanghai for sea freight, with an air option for urgent stops.
- Patterns: a large pattern library is already on hand; where there is no pattern we make one (3D-printed pattern with a machined mould).
- Pouring, heat treatment and machining are carried out in our own foundry, then the parts are inspected against the drawing before packing.
FAQ
How many concave segments make one bowl?
It depends on the machine size — from a few large segments on a small gyratory up to a full ring of segments on the largest units. We quote the complete segment set so the ring closes correctly.
Can you cast a mantle in more than one piece?
Yes. Large mantles are cast as a single piece where the pattern allows, and as split sections where transport or installation requires it.
Do you supply wear parts for both gyratory and jaw primary stations?
Yes — primary jaw plates and gyratory mantles and concaves are all cast in the same foundry, so a primary station can be supplied from one source.
Matching wear parts for this series
3 matching products found.