The Bosch CSB 500 RE (marketed as PSB 500 RE in several European countries) remains a corded percussion drill that we frequently encounter on the second-hand market. Its 500 W motor, 13 mm chuck, and percussion function make it an entry-level tool that Bosch has released in several sub-references, a point rarely documented in standard product sheets.
Keyed chuck or keyless: two sub-references not to be confused
Recent listings on the secondary market clearly distinguish two configurations of the CSB/PSB 500 RE. The first features a keyed chuck, while the second has a keyless chuck. This distinction has direct implications for usage.
The keyed chuck offers more reliable clamping under load, particularly in percussion when drilling into soft masonry. The keyless chuck speeds up the bit change but loses clamping torque as mechanical wear progresses. When buying a second-hand machine, checking the type of chuck and its radial play is the first thing to do before purchase.
We recommend always asking for the exact reference listed on the motor’s nameplate. This detail helps to find the specifications of the Bosch CSB 500 RE that precisely correspond to the variant at hand.
Carbon brushes and wear parts of the Bosch CSB 500 RE: availability in 2026
The model has been removed from the Bosch consumer catalog for several years. Therefore, the question of long-term maintenance arises legitimately. Good news: spare parts sellers still list carbon brushes in the size 8 x 5 x 15 mm explicitly compatible with the PSB 500 RE.
This brush size is shared with other Bosch consumer drills of the same generation, making sourcing easier. We observe that as long as these brushes remain available, the machine can run for many more years, the 500 W motor being mechanically simple.
Checkpoints before replacing the brushes
- Remove the rear cover and inspect the condition of the commutator (burn marks, deep grooves). A marked commutator requires resurfacing, not just a new set of brushes.
- Measure the remaining length of the brushes. Below 5 mm, replacement is imperative to avoid a destructive electric arc on the rotor.
- Check the condition of the return spring of each brush. A weakened spring causes intermittent contact and drops in speed under load.
Actual drilling capabilities: wood, steel, and masonry
With 500 W input, the usable power at the chuck is significantly lower. The machine remains comfortable for standard drilling in soft wood and thin steel, but its limits quickly appear in reinforced concrete. The mechanical percussion of this type of drill does not compete with an SDS hammer drill; it is suitable for light work in hollow brick and concrete blocks.
In wood, the maximum drillable diameter depends on the type of bit. With a standard twist drill bit, medium diameter holes pass without difficulty. Beyond that, the available torque becomes insufficient, and the machine stalls.
In steel, we recommend working at reduced speed with a properly sharpened HSS bit. The electronic speed control of the CSB 500 RE allows for this adjustment, an advantage over entry-level drills that lack a variable trigger.
Ergonomics and weight: a tool designed for occasional DIY
The CSB 500 RE belongs to the category of compact corded drills. Its lightweight design makes it manageable for short work sessions: mounting shelves, assembling furniture, drilling plugs into plaster.
The auxiliary handle screwed onto the neck of the chuck improves control during percussion, but its plastic knob clamping system lacks rigidity. On second-hand models, this handle is often missing or cracked. Plan to replace it or, if not possible, work with both hands on the pistol grip for heavy drilling.
What this drill does not replace
- An SDS hammer drill for anchoring in solid concrete or hard stone. The percussion of the CSB 500 RE is mechanical, not pneumatic.
- An impact driver for intensive screwing. The 13 mm chuck and lack of adjustable clutch make precision screwing risky.
- A pillar drill for repetitive drilling requiring constant angular precision.
Is it still worth buying a second-hand Bosch CSB 500 RE?
A well-inspected unit remains functional for light DIY, provided the condition of the chuck, brushes, and electronic speed control are checked. The resale price on the secondary market has become very low, making it an economical backup tool.
The real risk lies with specific mechanical parts (gearbox gears, rotor bearing) whose availability is no longer guaranteed by Bosch. If the motor runs smoothly and the chuck shows no excessive play, the machine can still be useful for several more years. Otherwise, it is better to invest in a model still in the catalog to benefit from manufacturer parts support.