A worn collet on a 689/2BI-US inner bearing puller is a spare-part job, not a new-tool job. This listing is one expandable collet. Pick the size that matches the inner race of the bearing you are pulling. Unior's published bands for the six SKUs we stock are 6.5-8, 10-12, 12-15, 17-20, 22-28 and 30-36 mm. Two picker labels differ from those bands: 7mm - 9mm is the 6.5-8 mm collet (SKU 623089) and 17mm - 22mm is the 17-20 mm collet (SKU 623092). The 689/2BI-US kit (SKU 626629) ships with all six of these collets. Buy this page when one size is worn, cracked, or missing. One purchase is one collet. Screw the collet onto the puller's M12 shaft. Pass it through the bearing bore, then turn the expander so the split body opens against the inner race. The 1 kg slide hammer then draws the bearing out square. That sequence is Unior's official usage for the parent puller. Compatibility Unior 689/2BI-US Inner Bearing Puller sold here (SKU 626629). Official Unior now lists that same SKU as 689/5BI-US; the thread is M12 on both names. Official current collet family is article 689.1/5. Our store still uses article 689.1/4. The six SKUs 623089-623094 are the same codes on both articles. Not the 40-50 mm or 50-60 mm collets. Those are M14, codes 629562 and 629563, for the larger 689/5ABI puller, and they are not on this page. Specs Article on this store: 689.1/4 (official current article 689.1/5) Sold individually; one size per purchase Thread: M12 on all six SKUs we stock Official inner-race bands, maximum length, and bare-collet weight: SKU 623089: 6.5-8 mm, Lmax 54 mm, 38 g (picker 7mm - 9mm) SKU 623090: 10-12 mm, Lmax 56 mm, 53 g (picker 10mm - 12mm) SKU 623091: 12-15 mm, Lmax 62 mm, 65 g (picker 12mm - 15mm) SKU 623092: 17-20 mm, Lmax 70 mm, 125 g (picker 17mm - 22mm) SKU 623093: 22-28 mm, Lmax 90 mm, 269 g (picker 22mm - 28mm) SKU 623094: 30-36 mm, Lmax 100 mm, 525 g (picker 30mm - 36mm) Official page carries Unior's lifetime-warranty and trivalent-chrome (Cr3+) profile badges All listed dimensions are in millimetres and may vary in tolerance. Weight is in grams. Built in Zreče, Slovenia Unior has been forging hand tools in Zreče since 1919, and sponsors professional road and mountain-bike race teams. These are the same M12 expandable collets that ship in the 689/2BI-US kit; this page is how you replace one size without buying the whole puller again. Pro tip from our mechanics Match the collet to the inner race, not to the outside of the bearing or the hub shell. A collet that is too small will slip; one that is too large will not pass through the bore. Measure the inner race, then pick the official band that covers it, even if the picker label is the old 7mm - 9mm or 17mm - 22mm name. The puller procedure sits in Bearing and headset service: a workshop guide → FAQ Which size collet do I need? Match Unior's published inner-race band to the bearing you are pulling: 6.5-8, 10-12, 12-15, 17-20, 22-28 or 30-36 mm. Two picker labels on this page differ from those bands. 7mm - 9mm is the 6.5-8 mm collet (SKU 623089). 17mm - 22mm is the 17-20 mm collet (SKU 623092). Do I need the 689/2BI-US puller as well? Yes. This is a spare collet. It screws onto the M12 shaft of the 689/2BI-US Inner Bearing Puller sold here (SKU 626629). Official Unior now lists that same SKU as 689/5BI-US. It does not fit the larger 689/5ABI puller, whose 40-50 and 50-60 mm collets use an M14 thread. Is this a set of six collets? No. Each purchase is one size. The six-collet set ships with the 689/2BI-US puller kit. Buy this page when one size is worn or missing. Official Unior lists these as separate codes 623089 through 623094, not as a single 6-pack SKU. What thread and finish does Unior publish? All six sizes on this page are M12. The official collet page carries Unior's lifetime-warranty and trivalent-chrome (Cr3+) profile badges. Unior does not publish a steel grade on the collet datasheet.
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