Product range
Ferrhaus H·RC
The reference line. Cast grey iron hex head, virgin SBR coating, hard chrome knurled handle running through both heads. Increments of 0.5 kg from 1 to 10 kg and 2.5 kg from 12.5 to 50 kg. The hex face stops it rolling and takes the drop; this is the dumbbell a commercial floor buys and re-racks for a decade.
- Range
- 1 – 50 kg
- Coating
- Virgin SBR, 5 mm
- Handle
- 28 / 32 mm chrome
- Tolerance
- ± 1 %
02
Technical data
Our reading on the left, the standard on the right.
Values come from the current production batch and the test log that ships with it. Where a European regulation sets the limit we name it; where the limit is ours we say so, because an in-house rule and a legal one are not the same thing and blurring them is how this trade loses buyers.
| Parameter | Unit | Ferrhaus | Limit / standard |
|---|---|---|---|
| Weight deviation, batch average | % | 0.6 | in-house reject above ± 1.5; trade practice ± 3 |
| Weight deviation, single piece max | % | 1.4 | in-house reject above ± 1.5 |
| Head material | — | EN-GJL-200 grey iron | EN 1561, min. 200 MPa tensile |
| 8 PAHs in coating | mg/kg | < 0.2 | REACH Annex XVII/50, max. 1.0 |
| Coating hardness | Shore A | 65 ± 5 | in-house window 60 – 70 |
| Coating thickness, head face | mm | 5.0 | in-house minimum 4.0 |
| Coating adhesion, pull-off | MPa | 3.2 | in-house minimum 1.5 |
| Drop test before batch release | drops from 1.2 m | 5,000 | in-house; no coating separation permitted |
| Handle finish | — | Hard chrome over steel, knurled | — |
| Handle salt spray, ISO 9227 NSS | h | 96 | in-house minimum 48 |
| Handle pull-out force | kN | > 12 | in-house scrap below 8 |
| Handle diameter, 1 – 10 kg | mm | 28 | declared |
| Handle diameter, 12.5 – 50 kg | mm | 32 | declared |
| Increment, 1 – 10 kg | kg | 0.5 | declared |
| Increment, 12.5 – 50 kg | kg | 2.5 | declared |
| Marking | — | kg cast into the head, batch laser-etched on the handle | traceable to melt and coating lot |
EN ISO 20957-1 sets the general safety requirements for stationary training equipment; free weights are covered by its general clauses rather than by a dedicated part, so the numbers that decide a dumbbell are the material, the coating chemistry and the tolerance. REACH Annex XVII entry 50 is the binding one for a rubber-coated product sold into the EU: eight polycyclic aromatic hydrocarbons, one milligram per kilogram, in any part with prolonged skin contact.
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