{"id":226,"date":"2026-07-27T08:54:43","date_gmt":"2026-07-27T08:54:43","guid":{"rendered":"https:\/\/5speedtransmission.com\/?post_type=product&p=226"},"modified":"2026-07-27T08:54:43","modified_gmt":"2026-07-27T08:54:43","slug":"finished-bore-sprockets-european","status":"publish","type":"product","link":"https:\/\/5speedtransmission.com\/bs\/proizvod\/finished-bore-sprockets-european\/","title":{"rendered":"Lan\u010danici sa gotovim otvorom, evropski standard | Prethodno izbu\u0161eni DIN 8187, spremni za ugradnju"},"content":{"rendered":"
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06B \u2013 20B<\/p>\n

Chain Size Range<\/p>\n<\/div>\n

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10 \u2013 100 mm<\/p>\n

Bore Range<\/p>\n<\/div>\n

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H7<\/p>\n

Bore Tolerance (Standard)<\/p>\n<\/div>\n

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ISO 9001<\/p>\n

Certificirani kvalitet<\/p>\n<\/div>\n<\/div>\n

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Finished Bore European Standard Sprockets \u2013 Product Overview<\/h2>\n
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Korea Ever-Power finished bore European standard sprockets<\/a> are supplied pre-machined to your shaft diameter \u2014 bore, keyway and grub screws all done. The installer removes the sprocket from the box, slides it onto the shaft, tightens two grub screws and the drive is ready. No lathe, no broach, no keyway cutter required on site.<\/p>\n

The finished bore range covers chain sizes 06B-1 through 20B-1 to DIN 8187 \/ ISO R606, with bore diameters from 10 mm through 100 mm depending on chain size and tooth count. Every sprocket is pre-bored to H7 tolerance as standard \u2014 the correct fit class for a keyed shaft with normal industrial running clearance. H6 (interference fit) and H8 (loose clearance) are available on request for applications with specific assembly or thermal expansion requirements.<\/p>\n

The keyway is machined to BS 4235 Part 1 dimensions and supplied with two M-series grub screws positioned 90\u00b0 apart \u2014 one over the keyway and one at 90\u00b0. This dual-screw arrangement prevents axial movement of the sprocket under load reversals, which is a common cause of sprocket walk and premature bore wear in single-setscrew designs. The keyway base is machined square and the keyway walls are parallel to within the BS 4235 tolerance, ensuring the key seats fully without rocking.<\/p>\n

For shaft sizes outside the catalogue bore range, or for non-standard tolerances, our stock bore European sprockets<\/a> allow the bore to be machined to any diameter up to the hub maximum. For taper lock bush mounting, see our European taper bore range<\/a>.<\/p>\n<\/div>\n

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\u23f1 When to choose finished bore<\/p>\n