A reamer removes a small, controlled amount of material from a pre-drilled or bored hole to bring it to a precise final diameter, tolerance and surface finish — typically 0.1 to 0.3mm of stock left for the reamer to clean up.
HSS, HSS-E or solid carbide. HSS reamers suit general-purpose work in mild steel and non-ferrous materials. HSS-E (cobalt-alloyed) holds an edge better in stainless and tougher alloys. Solid carbide reamers — one-piece, monobloc construction rather than brazed-tip — are the choice for high-volume runs and harder materials where tool life and repeat accuracy matter most.
Straight flute vs spiral (helicoidal) flute. Straight flute reamers suit through-holes and general-purpose reaming. Spiral flute reamers clear chips more effectively in blind holes and interrupted cuts, and are available with through-coolant for deeper holes — our Toolex spiral flute carbide reamers are made to DIN 212B / DIN 8093 in tolerance classes H4 to H7.
Shank and application. Straight shank reamers fit drill chucks and collet holders; taper shank reamers mount directly in the machine spindle. Die maker reamers hold the tightest tolerances for toolroom work, and taper pin reamers produce tapered holes to standard or metric taper sizes.
Standard sizes are held in UK stock for same-day dispatch before 4pm. Custom sizes are made to order, typically within 24-48 hours.
