Bent, formed and terminated to your drawing — for air fryers, ovens, coffee machines, dishwashers and industrial air ducts. Every batch ships with hipot, insulation-resistance and leakage-current data at 1.06× rated voltage.
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Ranges we hold every day. Anything outside them is possible — it just needs a conversation before the drawing.
| Sheath diameter | Ø6.5 / 8.0 / 9.5 / 11 / 12.5 / 16 mm (tolerance ±0.05 mm) |
|---|---|
| Sheath material | SS304, SS321, SS310S, Incoloy 800 / 840, copper (water only) |
| Watt density | Air / dry: 3–8 W/cm² · Oil: 4–8 W/cm² · Water: 8–14 W/cm² · Max 25 W/cm² short section |
| Voltage / power | 12–480 V AC/DC · 100 W – 6 kW per element |
| Length | 50 – 6000 mm overall, straight or formed; tube bend radius ≥ 2.5 × Ø |
| Resistance tolerance | ±5 % or ±10 % at 20 °C, matched sets available for 3-phase |
| Terminals | Flat pin 4.8 / 6.3 mm, screw M4, silicone or fibreglass lead wire, ceramic bead, ring terminal |
| Cold zone | 20 – 60 mm each end (non-heating) to protect seals and terminals |
| Insulation resistance | ≥ 100 MΩ at 500 V DC (after 24 h at 60 °C / 95 % RH) |
| Dielectric strength | 1500 V AC / 1 s, leakage current < 0.5 mA at 1.06 × rated voltage |
| Fittings | Brass or stainless ferrules, M14 / M18 thread, mounting brackets, ceramic end caps |
| Operating temperature | Up to 750 °C sheath temperature (Incoloy 840), 450 °C for SS304 continuous |
Four things we control in the process, and four reasons elements fail in the field.
NiCr 80/20 or FeCrAl, resistance matched to ±3 %
MgO graded + compacted to 3.3–3.45 g/cm³
CNC bending to drawing, radius ≥ 2.5 × Ø
Welded or crimped terminals, cold zone set
100 % hipot, IR, R-value, leak current
200 pcs repeat size · 500 pcs new tooling · samples from 1 pc
After drawing confirmation, including test data
Engineering-backed quote with the wall thickness and watt density stated
200 pieces for a standard size, 500 pieces for a new tooling size. Prototypes and engineering samples are made in 1–20 pieces without MOQ.
12 working days for a formed M-type or U-type element after drawing confirmation, including hipot and leakage-current data. Air freight to EU / US is 3–5 days.
Yes. Send the physical sample or a drawing with sheath Ø, overall length, formed dimensions, wattage, voltage and terminal type. We measure and return a dimension report before quoting.
Yes — 120 V, 220–240 V and 3-phase 400 V are all built to order. Resistance is matched to ±5 % so parallel elements share load evenly.
IEC 60335-1 general requirements, plus IEC 60335-2-9 for toasters, grills and similar appliances, and IEC 60335-2-6 for cooking ranges. Hipot, insulation resistance and leakage current are 100 % tested.
Send a drawing, a sample photo or just the application — we will tell you what watt density and sheath you need before quoting.