Screwdriver kit with 3mm reamer

When the perfect fit makes the difference between winning and losing tenths

The Sloting Plus SP143230 Kit combines a screwdriver and a straight 3 mm reamer made of HSS steel and aluminium in one pack. A duo designed for those who work rigorously on their car preparation: no improvisation, no tolerating a hole that is not to specification.

Why a straight reamer and not a tapered one

The difference is significant. A tapered reamer gradually increases the diameter along the hole, meaning one end may be to specification while the other is already oversize. With aluminium or plastic parts — the most common materials in slot car chassis, mounts, and axle holders — that margin of error translates into play, vibration, or directly into a piece that goes in the bin.

The Sloting Plus straight reamer works with the same diameter from start to finish. The result is a hole that is cylindrical, clean, and precise throughout its length: the axle fits with the adjustment you decide, not with the randomness imposed by the tapered reamer.

Main features

• Diameter: 3 mm, constant throughout the cutting length.
• Materials: HSS (high-speed) steel for the cutting part and aluminium for the body/handle.
• Contents: pack with 2 units — screwdriver + reamer.
• Recommended use: aluminium and plastic parts.
• Reference: SP143230 — Sloting Plus.

Applications in the slot workshop

This kit is particularly useful for operations such as:

• Reworking axle holes in plastic or aluminium chassis after an impact or modification.
• Adjusting the motor mount when the housing has lost precision.
• Cleaning and calibrating drills in body parts or structural elements that are printed or machined.
• Any tuning work where the coaxiality of the axle is critical for track performance.

Correct assembly and use

The reamer works best when the prior hole has a diameter slightly smaller than nominal. It is introduced with gentle pressure and constant rotation — by hand or with low-speed tool holders — progressively removing chips. In aluminium, a drop of cutting oil extends the tool's life and improves the surface finish. In plastic, working dry and at low speed prevents the material from melting due to heat.

Common mistakes this reamer helps to avoid

• Using a tapered reamer on through holes: creates different diameters on each side of the part, compromising axle alignment.
• Forcing the tool without prior guidance: the hole may deviate from the centre. Always drill with a guide bit before reaming.
• Over-reaming: HSS steel cuts effectively; short passes and frequent fit checks are sufficient.

Frequently asked questions

What materials is this reamer suitable for?

Sloting Plus specifically recommends it for aluminium and plastic, the most common materials in slot car preparation parts. It is not designed for steel or other hard metals.

What advantage does HSS steel have over other steels?

High-speed steel (HSS) maintains its edge at higher temperatures than conventional carbon steel. This translates into cleaner cuts, greater tool durability, and less risk of hole deformation due to heat.

Does the reamer replace the drill?

No. The reamer refines and calibrates an existing hole; it is not designed to open material from scratch. The correct process is to first drill with a smaller diameter bit and then ream to the desired final diameter.

What exactly does the pack include?

The pack contains 2 units: a screwdriver and a 3 mm straight reamer. Both tools are made of HSS steel and aluminium.

Is it suitable for resin or FDM prints?

The information provided by Sloting Plus refers to aluminium and plastic. For parts printed in resin or FDM, performance depends on the hardness and brittleness of the specific material; we recommend testing on a non-critical point before using it on the final piece.

The Sloting Plus SP143230 Kit combines a screwdriver and a 3mm straight HSS steel reamer in a single pack — an essential precision tool for slot car builders working on aluminium and plastic parts. Unlike tapered reamers, the straight design guarantees a perfectly cylindrical hole along its entire length, ensuring accurate axle fit and eliminating the risk of oversized or conical bores. Ideal for slot car preparation, axle housing adjustment, and motor pod tuning.