This International Standard deals with

• shell reamers with taper bore, taper 1 : 30 (Included) with slot drive (Tables 1 and 2);
• the corresponding arbors for shell reamers (Tables 3 and 4).

It gives dimensrons

• for shell reamers with outside diameters above 19,9 mm (0.783 5 in) up to and including 101,6 mm (4 in) having taper bores with large end diameters d₁ from 10 mm (0.393 7 in) to 50 mm (1.968 5 in) and for the corresponding arbors;
• for shell reamer slots and arbor tenons (Tables 5 and 6), in order to ensure interchangeability of shell reamers and corresponding arbors, and details of a method of checking the taper elements.

It supplements ISO/R 236 and ISO/R 521.