Buy Taper Pin Reamers Online in Australia
Taper Pin Reamer Selection — Quick Reference
Taper pin reamers finish the tapered hole that accepts a taper pin (precision locating + locking fastener). The 1:50 metric / 1:48 imperial taper creates a self-locking friction fit. Reamer accuracy determines pin grip strength + repeatability.
| Reamer Type | Standard | Best For |
|---|---|---|
| HSS Hand Taper Pin Reamer (Straight Flute) | 1:50 metric (DIN 9 / ISO) | Hand reaming — toolroom + workshop assembly |
| HSS Hand Taper Pin Reamer (Helical Flute) | 1:50 metric | Smoother finish + better chip evacuation than straight flute |
| HSS Machine Taper Pin Reamer | 1:50 metric | Drill press / mill spindle reaming — production work |
| Sutton R105 Series (HSS) | 1:50 metric per DIN 9 | Workshop standard — straight flute hand reamer |
| Imperial Taper Pin Reamer | 1:48 imperial (ANSI) | US-origin equipment with imperial taper pins |
| Set of Common Sizes | Per standard — graduated set | Toolroom kit covering #0 - #10 or M3-M16 metric |
Critical: Match reamer standard EXACTLY to pin standard — 1:50 metric reamer + 1:48 imperial pin = oval + loose fit + poor grip. Drill the hole undersize first (at the SMALL end of the pin diameter) — reamer finishes the taper from there. Use cutting fluid + slow speed for HSS (60-100 RPM typical). Pin removal: drive from the SMALL end with pin punch — reamer can be re-applied to clean up the hole for new pin. Brands: Sutton Tools, Bordo. Companion: taper pins, reamers, adjustable hand reamers, chucking reamers.
Taper Pin Reamers
Taper pin reamers are used to finish the tapered hole into which a taper pin is fitted. Taper pins are self-locking, interference-fit fasteners used to locate and lock components on shafts — common applications include gear hubs, coupling flanges, crank handles, and shaft collars where the pin must resist rotational and axial loads.
Sutton Tools and Bordo
AIMS stocks taper pin reamers in high speed steel (HSS) from Sutton Tools and Bordo. Sutton's R105 series covers the standard taper pin reamer range in HSS for hand and machine reaming. Bordo supplies both metric and imperial HSS taper pin reamers, covering the taper pin sizes most commonly used in Australian engineering workshops and maintenance applications.
Taper Pin Standards — Metric and Imperial
Taper pins are made to both metric (ISO 8734) and imperial (ASME B18.8.2) standards. The standard taper is 1:50 (approximately 1.15°) on the diameter — the same self-locking taper used across both metric and imperial pin standards. When selecting a taper pin reamer, match it to the pin number (metric) or size number (imperial) of the pin being fitted, not just the nominal diameter, to ensure the correct taper length and entry diameter.
Reaming Technique
Taper pin holes are typically drilled undersize, then reamed to the finished taper using the reamer. Good results require a correctly-sized pilot hole, a slow cutting speed, cutting oil, and steady axial feed without side pressure. The pin should enter the reamed hole with hand pressure and lock firmly when driven home — if the pin bottoms out before locking, the hole is over-reamed and the assembly should be reworked. For general bore finishing and sizing work, see our adjustable hand reamers.
People Also Ask — Taper Pin Reamers
Q: What is a taper pin reamer used for?
A taper pin reamer finishes the tapered hole into which a taper pin is fitted. Taper pins are self-locking, interference-fit fasteners used to locate and lock components on shafts — common applications include gear hubs, coupling flanges, crank handles and shaft collars where the pin must resist both rotational and axial loads.
Q: What's the difference between a 1:50 and 1:48 taper pin reamer?
1:50 is the metric taper (to ISO 8734/DIN 9); 1:48 is the imperial/ANSI taper. The two are close but not interchangeable — fitting a 1:50 reamer to a 1:48 imperial pin, or vice versa, produces an oval, loose-fitting hole with poor grip. Always match the reamer standard exactly to the pin standard you're working with, not just the nominal diameter.
Q: What size pilot hole do I drill before reaming a taper pin hole?
Drill the pilot hole undersize at the small end of the pin's diameter, then use the taper pin reamer to finish the taper from there. Reaming without a correctly-sized pilot hole risks an oversized or off-centre taper, which reduces the pin's grip and locking strength once fitted.
Q: What speed and lubrication should I use when reaming taper pin holes?
For HSS taper pin reamers, use cutting fluid with a slow cutting speed — around 60-100 RPM is typical. Steady axial feed without side pressure keeps the taper accurate and the finish clean. Rushing the cut or reaming dry increases the risk of an oversized, chattered or off-taper hole.
Q: How do I remove a fitted taper pin?
Drive the pin out from the small end using a pin punch. If the hole needs to accept a new pin afterwards, the same taper pin reamer can be re-applied to clean up and true the hole before fitting the replacement pin.
Q: Should I choose a straight flute or helical flute taper pin reamer?
Straight flute HSS taper pin reamers are the standard choice for hand reaming in toolroom and workshop assembly work. Helical flute reamers give a smoother finish and better chip evacuation, which is useful in deeper holes or where chip clearing is difficult with a straight flute. Both come in the same standard metric or imperial taper — the flute type is about finish and chip clearance, not fit.