SPEC SHEET · K-BSB-51 · REV. 02 · 2026

51" BEAD SEAT BAND
SPEC SHEET

Part code
K-BSB-51
Diameter
51 in / 1 295 mm
Rated load
150 t
Compliance
ISO 4250-3 · AS 4457 · GB/T 2883
01 · DIMENSIONS

CRITICAL DIMENSIONS

Cross-section drawing of the K-BSB-51 rim assembly. Five reference dimensions (A–E) are CNC-machined to the tolerances called out in the table and verified on a 5-axis CMM before every unit ships.

51" BEAD SEAT BAND cross-section dimensions
Figure 1 — Cross-section & dimensionsdrawing K-BSB-51 · rev. 02 · 2026
REFDIMENSIONVALUETOLERANCE
ABand overall length218.8 mm±0.30 mm
BBead seat heel width32 mm±0.10 mm
CBead seat ⌀1 295.4 mm±0.20 mm
02 · ASSEMBLY

WHEEL-END ANATOMY

The complete 51" BEAD SEAT BAND wheel-end is a five-piece assembly. Every Kelios rim ships as a matched set — rim base, lock ring, side rings, and bead seat band — with the OEM-supplied hub remaining factory original.

51" BEAD SEAT BAND wheel-end anatomy with labeled components
Figure 2 — Wheel-end anatomycross-section · five-piece assembly
1
Side ring
Pairs with K-SR-51 — 51" outer flange
2
Bead seat band
This unit — forged HSLA 6082-T6, CNC-turned ±0.03°
3
Lock ring
Pairs with K-LR-EU57 / K-LR-S39 — 51" retaining ring
4
Rim base
Pairs with K-RB-CAT992G / K-RB-CAT994K — 51"/49" fleet
5
Wheel hub
OEM-supplied — Cat 785 · Komatsu 730E
03 · FEA

FINITE ELEMENT ANALYSIS

Every Kelios rim design is validated under 1.4× rated load in a Von Mises FEA solver before tooling is cut. The K-BSB-51 was meshed at refined element size with concentration at the lock-ring seat and bead radii — the two locations where field failures historically initiate.

51" BEAD SEAT BAND FEA stress visualization with Von Mises legend
Figure 3 — Von Mises stress & deformationsolver: SolidWorks Simulation · load case: 1.4× rated
Max Von Mises stress
6.12×10⁷ N/m²
Peak stress under 1.4× rated load — at the heel radius.
Yield safety factor
2.4×
Vs. HSLA 6082-T6 — 380 MPa yield.
Mesh elements
0.84M
Tetrahedral mesh — 0.4 mm element size at bead-contact radius.
Deformation (max)
1.48mm
Elastic deformation under peak load — fully recovered.

NEED THE FULL 128-PAGE 51" BEAD SEAT BAND SPEC PACK?

The complete K-BSB-51 catalog ships as a signed PDF with all five component drawings, the FEA report, material certificates, and a heat-lot traceable QC sheet for every unit you order.

Kelios — OTR Wheels Engineered to Endure