42 V | 200 Hz Head and Shaft

42 V / 200 Hz vibrating poker (Wacker Neuson, Enar, Husqvarna) — how it works

A vibrating poker (poker head, concrete vibrator head) is a cylindrical element immersed directly in fresh concrete. It drives out trapped air and consolidates the mix around the reinforcement, raising compressive strength and bond to the rebar. A 42 V / 200 Hz poker connects by a flexible hose — available at NORWIT.PL in lengths of 5, 7, 10 and 16 m — to a separate frequency converter, which turns 230/400 V mains voltage into a safe 42 V at around 200 Hz, delivering up to 12,000 vibrations per minute — four times the output of 50 Hz mains-powered equipment.

The key feature that sets pokers apart is where the motor sits. AFP technology (an internal motor built into the head itself) allows a longer hose without losing power, since the drive sends no mechanical energy along the cable. At NORWIT.PL you will find pokers primarily from Wacker Neuson, complemented by Enar and Husqvarna Construction models — equipment from these manufacturers is also available on the Wacker Neuson brand page. Pokers are one component of a complete 42 V / 200 Hz vibrator set.

Types of pokers — internal motor (AFP) or external motor in the converter box

There are two designs of converter-fed pokers on the market: an internal motor (AFP) built into the head itself, or an external motor housed in the converter box, driving the head through a flexible drive shaft inside the hose.

AFP pays off with the longest hose in the range, 16 m, where the absence of a mechanical shaft means no loss of power. The full set — a poker and a matched frequency converter — is in the parent 42 V / 200 Hz vibrators category.

Matching poker diameter to the type of concrete and reinforcement density

Head diameter is matched to the element's cross-section and reinforcement density. A too-thin poker slows the work down, while a too-thick one will not fit into a densely reinforced column.

Lean concrete (a thin levelling layer poured under a foundation) and foundation slabs — elements with lighter reinforcement — allow for a thicker poker (around 50–57 mm). Densely reinforced columns and beams call for a thinner head (around 25–30 mm). The poker is immersed every 30–50 cm and held for 5–15 seconds at each point — vibrating too long risks segregation of the mix.

Choosing poker hose length — 5, 7, 10 or 16 metres

Hose length determines how far from the converter you can work without repositioning it. The range includes variants of 5, 7, 10 and 16 m.

A shorter hose (5–7 m) is lighter to handle at ground level, while a longer one (10–16 m) cuts down on how often you need to reposition the converter — especially with AFP pokers, where hose length does not reduce the power delivered to the head.

Popular vibrating poker models at NORWIT.PL

Below are example AFP poker models, available in several hose-length variants.

Alongside the Enar M AFP series, the range includes pokers primarily from Wacker Neuson and models from Husqvarna Construction, in various diameters and hose lengths matched to converters from the same brand.

Professional 42 V / 200 Hz poker vs a cheap drill-mounted poker — the difference

Besides professional 42 V / 200 Hz sets, the market also offers cheap pokers that clamp onto an ordinary power drill — with no motor or converter of their own, driven only by the drill's rotation through a flexible shaft. This is equipment for occasional, small domestic jobs, not continuous work or densely reinforced elements — vibration frequency there depends on drill speed and is lower and less stable than the standardised ~200 Hz from a converter.

A professional Wacker Neuson, Enar or Husqvarna Construction poker has its own drive and keeps a constant frequency regardless of load — necessary when concreting foundations, walls and structural elements. Drill-mounted equipment cannot replace such a set where repeatable compaction quality matters.

Frequently asked questions about 42 V / 200 Hz vibrating pokers

Why buy a 42 V / 200 Hz vibrating poker at NORWIT.PL

We specialise in professional concrete compaction: our range includes 42 V / 200 Hz pokers with hose primarily from Wacker Neuson, complemented by Enar and Husqvarna Construction models — including AFP heads in hose variants of 5, 7, 10 and 16 m. We advise on head diameter and hose length, and recommend a matched frequency converter from the same brand to complete the set, available in the parent 42 V / 200 Hz vibrators category. Orders are fulfilled online.