What are the interior dimensions?

The interior chamber is approximately 6" x 6" x 6" Thank you!

can I use it to temper and harden steel ?

Probably. I am a glass artist and use this kiln for annealing art. This kiln can achieve 2200f, but you shouldn't push it above 2100f per manufacturers recommendation. The big thing is the size. I'm not sure how much steel you wish to temper, but the interior of this kiln is very small, one of the smaller available in fact, so keep that in mind when deciding. This is an amazing kiln however. I've owned two now. Probably the coolest feature is how insanely fast it heats up. I've never timed it, but I am pretty sure mine can hit 1050f in under two minutes with the door to the kiln closed ( I let it idle with the door open often, so I can garage projects). It is extremely portable. The Nintendo Gamecube of kilns, it even has a cool little handle! Plugs right into a standard wall socket, and needs much less clearance than other kilns (Mine just sits on the corner of my workbench). If this kiln will work for your needs, it is an easy buy in my opinion.

how big (ounce wise) of a crucible can fit into this furnance?

The Rapid Fire Pro has a 6" by 5" by 6" firing chamber. Whatever crucible you want to use that will fit in a space that size will work. This unit does not come with a crucible.

Where do I find a shelf for this kiln?

First off it comes with one, if you need another it needs to be 4-7/8" by 3-3/4".

RapidFire Pro-L Portable Digital Kiln Furnace with RapidHeat – 2200°F Electric Jewelry Making, Metal Clay, Enameling, Glass Fusing, Wax Burnout, Test Firing – Made in USA

Product ID: 422670563

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⚡8-10 min rapid heat

📏6"x5"x6" firing chamber

🔥2200°F max temp

Description

🔥 Compact power, rapid results—ignite your craft anywhere!

SPACIOUS YET COMPACT - Generous 6"x5"x6" chamber fits diverse projects without hogging your workspace.
LIGHTNING FAST HEAT UP - Reach blazing 2200°F in under 10 minutes with RapidHeat tech—cut your wait, not your creativity.
BUILT TO ENDURE IMPRESS - Raw steel body ages with character under heat, combining rugged durability with professional style.
PRECISION DIGITAL CONTROL - Digital panel and coiled resistance wire deliver exact temps for flawless firing every time.
ULTRA PORTABLE POWERHOUSE - Weighing just 12 lbs, this kiln travels wherever your artistry takes you—studio, workshop, or on-the-go.

The RapidFire Pro-L Portable Digital Kiln is a lightweight, USA-made electric kiln designed for jewelry making, metal clay, enameling, and glass fusing. It rapidly heats to 2200°F in 8–10 minutes using advanced RapidHeat technology, features a precise digital control panel, and offers a spacious 6"x5"x6" firing chamber. Durable raw steel construction ensures longevity and unique heat-induced coloration, making it a professional-grade, portable solution for artists and hobbyists alike.

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ASIN	B00L0OTDYE
Batteries required	No
Date First Available	12 January 2022
Item Weight	12 Pounds
Item model number	FUR-0056
Product Dimensions	20.32 x 17.78 x 33.02 cm; 5.44 kg

RapidFire Pro-L Portable Digital Kiln Furnace with RapidHeat – 2200°F Electric Jewelry Making, Metal Clay, Enameling, Glass Fusing, Wax Burnout, Test Firing – Made in USA

Description

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Common Questions