Medium and low watt density single-head cartridge heaters
Cartouche chauffante densité moyenne et basse
中、低功率密度单头电热管
Cartouche chauffante à extrémité unique de densité modérée pour le chauffage général de montages, plateaux et blocs. Tolère un alésage percé plutôt qu'alésé, au prix d'un élément plus long à charge égale.
- Max medium temperature
- 1022 °F(550 °C)
- Power range
- 0.05 – 2 kW
- Voltage
- 110 / 220 / 380 V, 50 Hz
- Sheath material
- 304 stainless, 316 stainless
- Medium
- Metal / mold
- Mounting
- Bore insert, Bracket
- Tube diameter
- 0.315–0.787 in
- Watt density guidance
- 8–20 W/cm² (52–129 W/in²)
- Lead time
- 12–22 days
- MOQ
- 20 units
- Pricing
- On application
Design notes
Tolérante à l'ajustement, plus durable en outillage courant
Not every heated block justifies a reamed bore. Medium and low density cartridges spread the same wattage over a longer heated zone, so the sheath runs cooler and the heater survives the drilled, slightly oversized bores that real workshop fixtures actually have.
The trade is physical size and warm-up time. A low density cartridge needs more length for the same kilowatts and brings the block up more slowly. Where cycle time matters and the bore can be held to H7, the high density series is the better answer; where the fixture is one-off, the bore is nominal, and the heater must simply keep working, this is the one to specify.
Common builds include stainless-overbraid leads for abrasion resistance, PTFE lead insulation where oil and coolant are present, and corrosion-resistant sheaths for damp environments.
Features
- Densité de puissance modérée — tolérante aux alésages percés
- Durée de vie accrue dans les montages polyvalents
- Diamètres de Ø8 mm à Ø20 mm
- Protection des conducteurs en tresse inox ou PTFE
- Option de gaine résistante à la corrosion pour ambiances humides
Typical applications
- Chauffage général de montages et de gabarits
- Chauffage de plateaux et de plaques d'outillage
- Blocs de préchauffage de lignes de gaz et de liquides
- Protection hors gel de vannes et blocs d'instrumentation
- Blocs chauffants de laboratoire et de bancs d'essai
North American build options
- Voltage
- 120 / 208 / 240 / 277 / 480 / 600 V @ 60 Hz
- Threads
- NPT or BSP cut to order
- Flanges
- ANSI B16.5 150# / 300#
- Drawings
- Issued in inches on request
These are build options, not stock items — the catalog part numbers above are 50 Hz with metric fine threads. State what you need on the RFQ.
Part numbers & dimensions
8 catalog part numbers in the JGD-M series
Built to order on diameter, length, wattage, voltage and lead type. Send the bore diameter and depth with the required wattage and we will confirm the density before quoting.
Minimum order quantity for this series is 20 units. Dimensions switch between millimetres and inches with the unit toggle in the header.
Full specification
- Sheath material
- 304 or 316 stainless
- Diameter range
- Ø8 – Ø20 mm
- Max. sheath temperature
- 550 °C
- Watt density
- 8–20 W/cm² (52–129 W/in²)
- Required bore
- Drilled nominal; reamed preferred
- Voltage
- 110 / 220 / 380 V
- Lead protection
- Fiberglass, PTFE or stainless overbraid
Questions engineers ask
When is a low density cartridge the right choice?
When the bore is drilled rather than reamed, when the fixture is a one-off, or when the block simply has to stay hot without a tight cycle time. Spreading the wattage over a longer heated zone keeps the sheath cool enough to survive an imperfect fit — which is the realistic condition in most workshop tooling.
How much slower is warm-up compared to a high density cartridge?
Meaningfully slower, because you are putting fewer watts into each square centimetre of block. If cycle time drives the process, hold the bore to H7 and use the high density series. If the block is held at temperature all shift, the slower warm-up costs nothing and the longer element life is worth having.
Commonly specified with
Related series
JGD-HSur planCartouche chauffante haute densité
Construction rétreinte pour blocs chauds, matrices et plateaux
- Temp. max.
- 1382 °F
- Puissance
- 0.05–3 kW
- Références
- 9
JGD-TSur planCartouche filetée et à sortie à angle droit
Se visse dans un bossage taraudé ; sort de côté quand la place manque
- Temp. max.
- 1202 °F
- Puissance
- 0.05–2 kW
- Références
- 8