IDEAL FLEXIBLE SHAFT [ID FS2M] [2 X 35MM] [ID VR860] CONCRETE VIBRATOR ACCESSORY [CARTON QTY: 5] - 20345

The IDEAL ID FS2M flexible shaft is specifically engineered and designed for use with the IDEAL VR860 concrete vibrator motor. The drive coupling and connection interface are purpose-built to match the VR860's output specifications, ensuring a secure fit and optimal vibration transmission. While the 35mm head diameter is a common size in the industry, we strongly recommend using the ID FS2M exclusively with the IDEAL VR860 to guarantee performance, safety, and warranty compliance. Using it with non-IDEAL motors may result in poor coupling, reduced vibration efficiency, or mechanical damage.

The 35mm vibrating head diameter of the ID FS2M is ideal for applications involving closely spaced reinforcement bars (rebar), narrow formwork sections, columns, and beams where a larger head simply cannot penetrate. A 35mm head provides a focused vibration radius that is highly effective for consolidating concrete in these confined areas. Larger diameter heads (50mm, 60mm+) are better suited for open, mass concrete pours such as large slabs or footings. For contractors working across varied project types, the 35mm flexible shaft is the most versatile and commonly used size for structural concrete work.

The IDEAL ID FS2M flexible shaft has a standard carton quantity of 5 units, which is designed to meet the procurement needs of contractors, distributors, and construction companies managing multiple vibrator setups on site. Please check the product listing or contact our sales team to confirm current single-unit availability. Purchasing in carton quantities typically offers a more cost-effective per-unit price and ensures you have spare shafts readily available — a practical consideration given that flexible shafts are wear items that may require periodic replacement in high-volume concrete operations.

To use the IDEAL ID FS2M flexible shaft correctly, first ensure the motor unit (IDEAL VR860) is switched off before attaching the flexible shaft. Connect the drive coupling of the shaft securely to the motor output. Once connected, start the motor and insert the 35mm vibrating head vertically into the freshly poured concrete at regular intervals — typically every 300mm to 500mm across the pour area. Allow the head to penetrate to near the bottom of the pour (or the previous lift) and hold it in place for 5 to 15 seconds per insertion point until air bubbles cease to rise to the surface. Withdraw the head slowly at approximately 75mm per second to avoid leaving voids. Never drag the vibrator horizontally through the concrete, as this can cause segregation.

The service life of the IDEAL ID FS2M flexible shaft depends on several operational factors. Frequency of use, concrete mix abrasiveness, and correct operating technique are the primary variables. Flexible shafts are considered wear items in concrete vibration — the spiral-wound inner shaft experiences mechanical fatigue over time, particularly if the shaft is bent at sharp angles during use or stored incorrectly (e.g., kinked or tightly coiled). To maximise service life, always operate the shaft with gentle, natural curves rather than sharp bends, clean the shaft and head thoroughly after each use to remove concrete residue, and store it loosely coiled in a dry environment. Having spare units from the carton of 5 on hand ensures uninterrupted site operations.

The effective vibration radius of a 35mm concrete vibrator head is typically in the range of 150mm to 250mm from the centre of the head, depending on the concrete mix consistency (slump), aggregate size, and vibration frequency. This means that for thorough consolidation, insertion points should be spaced no more than 1.5 times the effective radius apart — in practice, approximately every 300mm to 400mm across the pour. Overlapping the vibration zones slightly ensures no areas of concrete are left unconsolidated. For stiffer mixes with lower slump values, reduce the insertion spacing to ensure full coverage and eliminate all entrapped air.

If the ID FS2M flexible shaft appears to be running but consolidation is poor, there are several potential causes to investigate. First, check that the drive coupling connection between the shaft and the IDEAL VR860 motor is fully secured — a loose connection will result in reduced or erratic vibration transmission to the head. Second, inspect the flexible shaft for any sharp kinks or bends along its length, as these restrict the rotational energy reaching the vibrating head. Third, consider the concrete mix design — very stiff, low-slump mixes require longer dwell times and closer insertion spacing. Finally, ensure the vibrating head is being fully inserted to the required depth rather than being held near the surface, as surface vibration alone will not consolidate the full depth of the pour.

Unusual noises from the IDEAL ID FS2M flexible shaft during operation — such as rattling, grinding, or a high-pitched whine — can indicate several issues. A rattling sound may suggest that the vibrating head's internal eccentric weight has become worn or damaged, reducing vibration efficiency. A grinding noise often points to concrete aggregate or debris that has entered the shaft casing or head assembly, causing internal abrasion. A high-pitched whine may indicate the shaft is being operated at an angle that is too sharp, causing the inner spiral shaft to bind against the outer casing. In all cases, stop operation immediately, disconnect the shaft from the motor, inspect the unit thoroughly, and replace it if damage is confirmed. Continuing to operate a damaged flexible shaft can cause further mechanical failure and potential safety hazards on site.

Hardened concrete inside or around the 35mm vibrating head of the ID FS2M is a common site issue that occurs when the shaft is not cleaned promptly after use. Prevention is always the best approach — rinse the vibrating head and the lower section of the shaft with clean water immediately after each use, before the concrete has time to set. If concrete has already hardened, do not attempt to force the head open or use sharp tools that could damage the internal components. Instead, soak the affected area in a diluted concrete dissolver or mild acid solution (following all relevant safety precautions) to soften the hardened material before carefully removing it. Once cleaned, inspect the head for any damage to the casing or internal components. If the vibrating head is cracked, deformed, or the internal eccentric weight is compromised, the shaft should be replaced rather than reused to ensure safe and effective operation.