Medium and low watt density single-head cartridge heaters
中、低功率密度单头电热管
中、低功率密度单头电热管
中等功率密度的单端加热棒，用于一般工装、压板和金属块加热。可容忍钻孔而非铰孔的配合，代价是同等功率下元件更长。
- 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
对孔配合更宽容，通用工装寿命更长
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
- 中等功率密度 —— 可容忍钻孔配合
- 在通用工装中使用寿命更长
- 直径 Ø8 mm 至 Ø20 mm
- 不锈钢编织或四氟引线保护
- 可选耐腐蚀护套，用于潮湿环境
Typical applications
- 通用工装与夹具加热
- 压板与工艺板加热
- 气体与液体管路预热块
- 阀门与仪表块防冻
- 实验室与试验台加热块
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
