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Views: 0 Author: YWS Bearing Editorial Team Publish Time: 2026-11-09 Origin: FKL official 206KRRB6 specifications; YWS category and enquiry links
Quick answer: Hex-bore and round-bore agricultural bearings are identified by different inner-bore geometry. For a hex bore, record the across-flats size and, if available, the corner-to-corner diagonal; for a round bore, record the diameter. Do not compare these numbers as if they were the same measurement. Check the complete model, outside diameter, widths, seals and shaft drawing before replacing a bearing.
A hexagonal opening is normally described by the distance across two opposite flat faces. Its diagonal is larger. A round bore is measured as a circular diameter. If an old agricultural bearing is identified only by “1 inch” or a photo, ask whether that number means nominal shaft size, hex across-flats, diagonal, or a separate catalogue bore value.
FKL's product page distinguishes the 206KRRB6 hexagonal bore, shaft size and bore diameter, and separately lists its other boundary dimensions. These are model-specific catalog references, not a universal definition for every brand or suffix.
FKL 206KRRB6 item | FKL listed value | Buyer check |
|---|---|---|
Hexagonal bore across flats (a) | 1.001 in / 25.43 mm | Confirm actual shaft flat-to-flat measurement |
Shaft size | 1 in | Confirm what the mating assembly calls nominal shaft size |
Hexagonal diagonal (a1) | 1.152 in / 29.26 mm | Do not substitute the diagonal for across-flats |
Bore diameter listed (d) | 1.02 in / 26 mm | Keep the manufacturer's separate field label; request its drawing if unclear |
Outside diameter D | 2.4409 in / 62 mm | Measure housing envelope |
Inner ring width B / outer ring width C | 0.945 in / 24 mm; 0.63 in / 16 mm | Check the correct ring and shoulder spacing |
FKL 206KRRB6 product image. The linked manufacturer page identifies the model and its listed dimensions. This is an external manufacturer reference, not a YWS product offer.
Record | How to specify it |
|---|---|
Bore shape | Hex, round, splined or another form; photograph the end view |
Hex geometry | Across-flats value and diagonal separately, with units |
Other dimensions | Outside diameter and inner/outer ring widths as shown on the drawing |
Model and seal | Complete manufacturer model and seal/shield suffix; do not infer from appearance |
Application | Machine model, shaft drawing, load direction, speed, contamination and moisture |
Approval | Compare the proposed replacement drawing and list any deviations |
Not by dimension alone. The shape and contact geometry differ, and the FKL page itself reports separate hexagonal bore, shaft-size and bore-diameter fields for its 206KRRB6 example. Confirm the shaft and bearing drawing together.
No. It is a different measurement across opposite corners. Report which measurement you took and provide an end-view photo or drawing.
No. They are catalogue leads. Confirm the complete dimensions, seal, locking arrangement and application requirements with the offered manufacturer's drawing.
Send the old model marking, end-view and side photos, measured across-flats or round-bore diameter, outside diameter, ring widths, machine model, quantity and destination. See the YWS bearing RFQ checklist, browse YWS track roller bearings, or contact YWS Bearing / request a quote with the drawing for confirmation.
FKL Czech, official 206KRRB6 product specifications and model drawing. Values above refer to that model's published page; they must not be generalized to other manufacturers or models. No FKL affiliation or authorization is implied.
Prepared by YWS Bearing Editorial Team. Source checked 9 November 2026. This purchasing checklist helps organize identification; confirm the exact offered drawing and machine fit before replacement.
