Hex dumbbells · Türkiye
A dumbbell is bought once and dropped ten thousand times. What a buyer actually pays for is whether the head is still bonded to the handle in year four, and whether the 20 kg on the stamp is 20 kg on the scale.
Production
Foundry and coating line, Türkiye
Range
1 – 50 kg, cast in-house
Standard
EN ISO 20957-1 · REACH XVII/50
Lead time
28 days ex-works
01 — Core
The head is cast grey iron to EN 1561, grade EN-GJL-200, with a mill certificate per melt. The cheap alternative is a cement or steel-shot fill inside a plastic shell: it hits the target weight, costs a third and cracks the first time a rack is loaded badly. A cast head has no seam to open.
02 — Handle
The handle is a single machined steel bar that runs through both heads, not two studs pressed into cast pockets. Hard chrome over the grip, knurled at 28 mm on the 1–10 kg range and 32 mm above it. Pull-out force is measured at over 12 kN; anything below 8 kN is scrapped, not reworked.
03 — Coating
Five millimetres of virgin SBR over the head face, 65 ±5 Shore A. No reclaim, which is why the pallet does not smell when the shrink wrap comes off. Adhesion is pull-off tested at 3.2 MPa against an in-house floor of 1.5, and the coated piece is dropped 5,000 times from 1.2 m before the batch is released.
02
Product range
The range is divided the way a buyer orders: by what the dumbbell is coated with and where it will sit. A boutique studio, a hotel gym and a hard-use commercial floor need different coatings on the same cast head, the same handle and the same tolerance — so a mixed order still reads as one set on the rack.
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.
The same cast head under a urethane skin. Urethane costs more and earns it in two places: it does not mark a light-coloured floor and it does not smell at all, which is what a hotel or a boutique studio is actually paying for. Colour-matched to a brand palette on orders above 200 pairs.
Round-head urethane, for floors that rack rather than rest on the ground. The round head seats in a saddle rack and reaches 60 kg, where a hex head of the same weight gets too wide to sit in a two-tier. Straight knurled handle with a 12-sided end face so it does not roll on a flat bench.
Bare cast iron hex with a baked powder coat and no rubber at all. Ordered by outdoor and military installations, and by markets where a rubber compound has to clear an import test the buyer would rather avoid entirely. Salt spray on the coated head runs to 240 hours.
Ten pairs from 1 to 10 kg in a moulded cradle, packed as one retail-ready carton. Built for distributors selling into home and studio channels: it lands as a single SKU, stacks four high on a pallet and needs no assembly. Private-label print on the carton from 500 sets.
Two-tier rack for ten pairs, shipped knocked down. Welded 60 x 60 mm frame, rubber-lined saddles and a rated shelf load of 500 kg per tier. It exists so a container of dumbbells arrives with somewhere to put them — most rack complaints on a commercial floor are about the saddle pitch, so ours is set for our own head widths.
01
Technical data
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 |
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.
Full technical data, quality window and container loading (+10) →02
Where we sit in the window
Every rubber-coated dumbbell sold into the EU clears the same chemical ceiling and every maker claims the same weights. What separates one from the next is how much room is left between the reading and the limit — because that gap is what is still there after four years of being dropped on a rubber floor.
Tested per compound batch by an accredited laboratory, referenced by report number on the packing list. Reclaimed rubber typically reads between 2 and 20 mg/kg, which is why we do not buy it.
Mean absolute deviation over a 500-piece sample, weighed finished. Our own reject line is ± 1.5 %; a piece that misses goes back to the melt rather than being stamped as the next increment.
Neutral salt spray to first white rust on the chrome. Ninety-six hours is what keeps a handle presentable in a humid coastal gym, which is where most of the complaints in this category come from.
Measured on the head face after the 5,000-drop cycle, not before it. Adhesion measured on a fresh piece tells you nothing about the failure everyone actually sees: rubber peeling off the corner of the hex in year three.
PAH and salt spray figures come from accredited laboratory reports for the compound and the plating in use. Weight, adhesion and drop figures come from our own test log for the batch, referenced by lot number. Both sets go out with the document set on request.
06
Compliance
Free weights are bought on chemistry and on what the coating does in year four, not on a quality-system logo. The set below goes out with the quotation, referenced by lot number so the buyer can verify it at the issuing body rather than trusting a scan.
Stationary training equipment — general safety requirements and test methods, applied to the free-weight range
Eight polycyclic aromatic hydrocarbons in rubber and plastic parts with prolonged skin contact — max. 1.0 mg/kg, tested per compound batch
Grey cast iron, grade EN-GJL-200 — mill certificate issued per melt
Neutral salt spray on the chrome handle finish — report issued per plating lot
Quality management system covering the foundry, the machining shop and the coating line
Issued per product line and named on the packing list of every shipment
03
Catalogue
The catalogue carries the same numbers you are reading here — dimensional table per increment, quality window, container loading per line and warranty terms — in a file you can forward to a purchasing department without rewriting anything.
OEM and private-label production is quoted separately: send the coating colour, the logo artwork for the head face and the annual quantity, and we return a unit price and a tooling cost. Head-face branding is moulded, not printed, so it does not wear off the first year.
Contact
Send the lines, the quantity and the port. We answer with price, stow plan and lead time — and if the date is not one we can hold, we say so before you place the order rather than after.
