Home Split Sheath Cartridge Heaters

Split Sheath Cartridge Heaters(Expandable)

Engineered for tight‑fit bores and demanding cycles. Our split‑sheath cartridge heaters expand when energized to maximize heat transfer and minimize hot spots—then contract when de‑energized for easier service. Ideal for dies, molds, platens, and packaging heads.

Product Details

Sheath Material	Stainless Steel 304 (316 optional)
Insulation	High-purity MgO
Tolerance – Diameter	+0.000 / −0.003 in typical
Tolerance – Length	±1.5% typical
Lead Exit	Standard axial; right-angle optional
Max Sheath Temp	Up to 1400 °F (760 °C), application-dependent
Typical Watt Density	45–65 W/in² depending on fit & material
Certifications	CE, RoHS (when specified)

Specifications are typical. Final values depend on configuration and tolerances requested.

High transfer efficiency

Split-sheath design expands when energized to improve contact and heat transfer; contracts when de-energized for easier removal.

Stable watt density

Optimized winding and MgO insulation help deliver uniform sheath temperatures across the heated length.

Serviceable & durable

Replaceable leads, optional armor, and robust 304/316 stainless steel sheath for industrial uptime.

Insulation & moisture options

Moisture-resistant potting, strain reliefs, and optional ground-fault protection accessories.

Injection mold & die bushings

Packaging jaws & sealing bars

Hot runner manifolds & nozzles

Platens, plates, and fixtures

Lab & pilot-plant heaters

Straight Leads

Most common. Cost‑effective.

Right‑Angle Leads

Tight spaces. Better strain relief.

Stainless Braid

Abrasion protection.

Stainless Overbraid + Heat Shrink

Moisture resistance.

Swaged End Disk

High watt density. Long life.

Grounded/Un‑grounded TC

Fast response or noise‑safe.

Get Pricing

Send your drawing or pick a size. We reply fast.

FAQ

How tight should the bore fit be?

For best transfer, target 0.002–0.004 in interference for standard fits. Split‑sheath heaters tolerate slightly looser fits than solid cartridges, but tighter fits generally improve life. Always validate on your tooling.

Can I run these on a PID controller?

Yes. Use a properly sized SSR or contactor and include over‑temperature protection (e.g., thermocouple with high‑limit controller). Rapid cycling generally benefits split‑sheath designs.

What’s the difference between heated and overall length?

Overall length includes unheated cold sections at each end for lead exit and mechanical strength. Heated length is the active coil section used to calculate watt density.

Do you offer right‑angle lead exits or threaded fittings?

Yes—right‑angle exits, threaded NPT fittings, and custom glands are available. Specify during quoting.

Elekheat-Certification

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Whether you’d like to learn more about product specifications, request a custom solution, or request a quote, we’re happy to assist you.

Split Sheath Cartridge Heaters(Expandable)