Furnaces | McMaster-Carr

	Temperature Setting Temperature Setting

	Voltage Voltage

120V AC

240V AC

	Capacity Capacity

	Heater Type Heater Type

Furnace

Oven

	Inside Width Inside Width

	Scale Scale

Celsius

Fahrenheit

	Inside Depth Inside Depth

	NEMA Style NEMA Style

	Temperature Control Temperature Control

Adjustable
Control Knob

Button

	Wattage Wattage

	Overall Width Overall Width

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Material Material

Steel

Ceramic

Stainless Steel

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Inside Height Inside Height

	Current Current

	Door Opening Direction Door Opening Direction

Lifts Up

Drops Down

Swings to the Side

	Cord Length Cord Length

4 1/2 ft.

6 ft.

8 ft.

	Number of Doors Number of Doors

	Overall Height Overall Height

	Overall Depth Overall Depth

	Electrical Connection Type Electrical Connection Type

Plug

Hardwire

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant with
Exemptions

RoHS Compliant

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69 Products

About Selecting Thermal Insulation

76 and 128 cu. in. Capacity

550 cu. in. Capacity

Achieve temperatures as high as 1200° C for heat-treating metal.

76 and 128-cu. in. capacity furnaces have an LED that shows actual or set-point temperature in ° C; an indicator light flashes when set temperature is reached. The safety switch shuts off the furnace when the door is opened.

For technical drawings and 3-D models, click on a part number.

120V AC—Single Phase

NEMA 5-15 Plug

NEMA 5-50 Plug

		Inside			Overall
Cap., cu. in.	Temp. Setting (Accuracy)	Ht.	Wd.	Dp.	Ht.	Wd.	Dp.	Material	Wattage, W	Current, A	Plug Type	NEMA Style		Each
76	100° to 1100° C (±0.3° C)	3 3/4"	4"	5"	14"	9"	13"	Steel	1,060	9	Three Prong	5-15	0000000	000000000
128	100° to 1100° C (±0.5° C)	4 1/4"	5"	6"	15"	10"	16"	Steel	1,450	12	Three Prong	5-15	0000000	00000000
550	77° to 2,192° F (±9° F) 25° to 1,200° C (±5° C)	8"	8"	9"	23"	19"	25"	Steel	3,360	28	Three Prong	5-50	0000000	00000000

Replacement Control Circuit Board for 550 cu. in. and 1,750 cu. in. Cap. Furnace	000000000	Each	0000000
Replacement Power Switch for 550 cu. in. and 1,750 cu. in. Cap. Furnace	000000000	Each	00000
Replacement Thermocouple for 550 cu. in. and 1,750 cu. in. Cap. Furnace	000000000	Each	00000
Replacement Door Switch for 550 cu. in. and 1,750 cu. in. Cap. Furnace	000000000	Each	00000
Replacement Heating Plate for 550 cu. in. Cap. Furnace	000000000	Each	00000000
Replacement Thermocouple for 76 cu. in. Cap. Furnace	0000000	Each	00000
Replacement Heating Element for 76 cu. in. Cap. Furnace	0000000	Each	000000
Replacement Heating Element for 128 cu. in. Cap. Furnace	0000000	Each	000000
Replacement Thermocouple for 128 cu. in. Cap. Furnace	0000000	Each	000000

240V AC—Single Phase

NEMA 6-20 Plug

		Inside			Overall
Cap., cu. in.	Temp. Setting (Accuracy)	Ht.	Wd.	Dp.	Ht.	Wd.	Dp.	Material	Wattage, W	Current, A	Plug Type	NEMA Style		Each
550	77° to 2,192° F (±9° F) 25° to 1,200° C (±5° C)	8"	8"	9"	23"	19"	25"	Steel	3,360	14	Three Prong	6-20	0000000	000000000

Replacement Heating Plate	Each	000000000
Replacement Thermocouple	Each	00000
Replacement Door Switch	Each	00000
Replacement Power Switch	Each	00000
Replacement Control Circuit Board	Each	000000

Programmable High-Temperature Furnaces

550 cu. in. Capacity

Program time, temperature, and rate of temperature change. These furnaces reach temperatures as high as 2192° F for heat-treating metal. These furnaces have six programmable parameters: 1) delay start, 2) rate of temperature change, 3) target temperature, 4) temperature timer, 5) memory retrieval, and 6) °C/°F digital display. Link two three-stage programs to create a six-stage operation. A maximum of 10 programs can be stored with up to a seven-day delay. An LCD shows internal temperature, countdown time, and program number.

For technical drawings and 3-D models, click on a part number.

120V AC—Single Phase

NEMA 5-50 Plug

		Inside			Overall
Cap., cu. in.	Temp. Setting (Accuracy)	Ht.	Wd.	Dp.	Ht.	Wd.	Dp.	Material	Wattage, W	Current, A	Plug Type	NEMA Style	Cord Lg., ft.		Each
550	77° to 2,192° F (±9° F) 25° to 1,200° C (±5° C)	8"	8"	9"	23"	19"	25"	Steel	3,360	28	Three Prong	5-50	6	0000000	000000000

Replacement Door Switch	Each	000000
Replacement Thermocouple	Each	00000
Replacement Power Switch	Each	00000
Replacement Control Circuit Board	Each	000000
Replacement Heating Plate	Each	00000000

240V AC—Single Phase

NEMA 6-20 Plug

NEMA 6-50 Plug

		Inside			Overall
Cap., cu. in.	Temp. Setting (Accuracy)	Ht.	Wd.	Dp.	Ht.	Wd.	Dp.	Material	Wattage, W	Current, A	Plug Type	NEMA Style	Cord Lg., ft.		Each
550	77° to 2,192° F (±9° F) 25° to 1,200° C (±5° C)	8"	8"	9"	23"	19"	25"	Steel	3,360	14	Three Prong	6-20	6	0000000	000000000
1,750	77° to 2,192° F (±9° F) 25° to 1,200° C (±5° C)	12"	12"	12"	28"	23"	30"	Steel	7,333	31	Three Prong	6-50	6	0000000	00000000

Replacement Door Switch for 550 cu. in. and 1,750 cu. in. Cap. Furnace	Each	000000
Replacement Heating Plate for 550 cu. in. Cap. Furnace	Each	00000000
Replacement Control Circuit Board for 550 cu. in. and 1,750 cu. in. Cap. Furnace	Each	000000
Replacement Thermocouple for 550 cu. in. and 1,750 cu. in. Cap. Furnace	Each	00000
Replacement Power Switch for 550 cu. in. and 1,750 cu. in. Cap. Furnace	Each	00000
Replacement Heating Plate for 1,750 cu. in. Cap. Furnace	Each	00000000

Ovens

Also known as gravity convection and laboratory ovens, heat rises from the base into the oven chamber and out through the top vents. Use these general purpose ovens for heating and curing up to 437° F. The control components are CSA certified and UL recognized.


	NEMA 5-15
	NEMA 6-15

		Inside			Overall				Shelf
Cap., cu. ft.	Temp. Setting (Accuracy)	Ht.	Wd.	Dp.	Ht.	Wd.	Dp.	No. of Shelves	Cap., lbs.	Type	Material	Insulation Material	Wattage, W	Current, A	Plug Type	NEMA Style		Each
120V AC—Single Phase
0.7	93° to 437° F (±6° F) 34° to 225° C (±3° C)	10"	12"	10"	17"	14"	12"	2	35	Adjustable	Steel	Mineral Wool	600	5	Three Prong	5-15	0000000	0000000
1.3	93° to 437° F (±6° F) 34° to 225° C (±3° C)	13"	13"	13"	21"	15"	15"	2	35	Adjustable	Steel	Mineral Wool	750	6	Three Prong	5-15	0000000	000000
2	93° to 437° F (±6° F) 34° to 225° C (±3° C)	16"	18"	12"	25"	20"	14"	2	35	Adjustable	Steel	Mineral Wool	1,200	11	Three Prong	5-15	0000000	000000
3	93° to 437° F (±6° F) 34° to 225° C (±3° C)	21"	18"	14"	30"	20"	16"	2	35	Adjustable	Steel	Mineral Wool	1,500	13	Three Prong	5-15	0000000	00000000
240V AC—Single Phase
2	93° to 437° F (±6° F) 34° to 225° C (±3° C)	16"	18"	12"	25"	20"	14"	2	35	Adjustable	Steel	Mineral Wool	1,200	11	Three Prong	6-15	0000000	00000000
3	93° to 437° F (±6° F) 34° to 225° C (±3° C)	21"	18"	14"	30"	20"	16"	2	35	Adjustable	Steel	Mineral Wool	1,600	13	Three Prong	6-15	0000000	00000000

Replacement Shelf for 0.7 cu. ft. Cap. Oven	0000000	Each	000000
Replacement Shelf Support for All Ovens	0000000	Each	0000
Replacement Thermometer for All Ovens	000000	Each	00000
Replacement Thermostat for 0.7 cu. ft. Cap. Oven	000000	Each	00000
Replacement Shelf for 2 cu. ft. Cap. Oven	0000000	Each	00000
Replacement Thermostat for 1.3 cu. ft., 2 cu. ft., 3 cu. ft. Cap. Oven	000000	Each	000000
Replacement Shelf for 1.3 cu. ft. Cap. Oven	0000000	Each	00000
Replacement Shelf for 3 cu. ft. Cap. Oven	0000000	Each	00000

Forced-Air Ovens

These mechanical convection ovens have a blower to circulate air for more consistent heating throughout than gravity-style ovens. They heat and cure up to 550° F.

5.3 and 7 cu. ft. Capacity

36 cu. ft. Capacity

NEMA 5-30

NEMA 5-20

		Inside			Overall				Shelf
Cap., cu. ft.	Temp. Setting, °F (Accuracy)	Ht.	Wd.	Dp.	Ht.	Wd.	Dp.	No. of Shelves	Cap., lbs.	Type	Material	Wattage, W	Current, A	Electrical Connection Type	NEMA Style	Features		Each
Ovens—120V AC (Single Phase)
5.3	120° to 550° (±10° F)	16"	26"	22"	23"	41"	30"	2	20	Adjustable	Stainless Steel	2,400	23	Plug	5-30	On/Off Indicator Light	0000000	000000000
7	120° to 350° (±10° F)	18"	28"	24"	23"	41"	30"	2	20	Adjustable	Stainless Steel	2,000	20	Plug	5-20	On/Off Indicator Light	0000000	00000000
7	120° to 350° (±10° F)	18"	28"	24"	23"	41"	30"	2	20	Adjustable	Stainless Steel	2,000	20	Plug	5-20	On/Off Indicator Light, 12-hr. Timer	0000000	00000000
Ovens—240V AC (Single Phase)
7	120° to 350° (±10° F)	18"	28"	24"	23"	41"	30"	2	20	Adjustable	Stainless Steel	2,000	11	Hardwire	__	On/Off Indicator Light	0000000	00000000
36	120° to 400° (±2° F)	36"	36"	48"	47"	40"	55"	2	50	Adjustable	Stainless Steel	6,600	33	Hardwire	__	On/Off Indicator Light	0000000	000000000

Replacement Gasket for All Ovens	0000000	Per Ft.	000000
Replacement Shelf for 5.3 cu. ft. Cap. Oven	0000000	Each	000000
Replacement Shelf for 7 cu. ft. Cap. Oven	0000000	Each	000000
Replacement Shelf for 36 cu. ft. Cap. Oven	0000000	Each	000000

Optional Stands

For 30" Overall Dp. Oven

For 55" Overall Dp. Oven

For Oven
Overall Dp.	Overall Wd.	Overall Ht.		Each
30"	41"	31"	0000000	0000000
55"	40"	24"	0000000	000000

Portable Stick Electrode Ovens

Transfer electrodes from a holding oven to the job site. The oven stores electrodes at the optimum temperature to keep them dry and in prime condition. It requires power during transit in order to maintain temperature. A light indicates the oven is on.

								Inside
Capacity, lbs.	For Max. Electrode Lg.	Voltage	Wattage	Temperature Setting, °F	Ht.	Wd.	Dp.	Ht.	Wd.	Dp.	Material	Wt., lbs.	Specifications Met	Temperature Control	Cord Lg., ft.	Plug Type		Each
50	18"	120V AC/240V AC	150W	275°	21"	8"	8"	19"	6"	6"	Steel	18	CSA Certified	Thermostat	8	Three Prong	0000000	0000000

Bench-Top Stick Electrode Ovens

Store electrodes at the optimum temperature to keep them dry and in prime condition. A light indicates the oven is on.

Square Ovens

								Inside
Capacity, lbs.	For Max. Electrode Lg.	Voltage	Wattage	Temp. Setting, °F	Ht.	Wd.	Dp.	Ht.	Wd.	Dp.	Material	Wt., lbs.	Specifications Met	Temp. Control	Cord Lg., ft.	Plug Type		Each
200	18"	120V AC	500W	150° to 300°	16 1/2"	16 1/2"	24"	12 1/2"	12 1/2"	18 1/2"	Steel	53	CSA Certified	Adjustable Control Knob	8	Three Prong	0000000	000000000

Round Ovens

Capacity, lbs.	For Max. Electrode Lg.	Voltage	Wattage	Temp. Setting, ° F	Ht.	Wd.	Dp.	ID	Inside Dp.	Material	Wt., lbs.	Specifications Met	Temp. Control	Cord Lg., ft.	Plug Type		Each
450	18"	120V AC	1,000W	150° to 550°	26"	25"	26"	19 1/2"	20"	Steel	90	CSA Certified	Adjustable Control Knob	8	Three Prong	0000000	000000000

Firebrick Insulation

Max. Temperature: See table
Heat Flow Rate: See table
Density: See table
Color: Off-White
Specifications Met: ASTM E84 0/0 for Flame and Smoke

Often used in furnaces, these firebricks have been machined for a snug fit to minimize heat loss. They are flame resistant, meeting ASTM E84 0/0 for flame and smoke. Cut with a brick saw and install with the firebrick bonding mortar (sold separately).

			2 1/2" × 4 1/2" × 9"			2 1/2" × 9" × 24"
Max. Temperature, °F	Heat Flow Rate	Material	Density, lbs./cu. ft.		Each	Density, lbs./cu. ft.		Each
2300°	1.7 Btu @ 1500° F	Clay/Ceramic	45	000000	000000	42	000000	000000
2600°	2.2 Btu @ 1500° F	Clay/Ceramic	45	000000	00000	48	000000	00000
3000°	3.1 Btu @ 1500° F	Clay/Ceramic	65	000000	00000	__	000000	00

Handsaw with 15" Blade	0000000	Each	000000
Firebrick Bonding Mortar (15-lb. Pail)	000000	Each	00000

Firebrick Repair Coatings

Temperature Range: -50° to 2350° F
Density: 100 lbs./cu. ft.
Color: Beige

Renew heat resistance and performance of worn firebrick. Apply coating with a brush or spray on for a crack-free seal.

Container Size, gal.	Approximate Coverage, sq. ft.		Each
1	93	000000	0000000

Firebrick Bonding Mortar

Max. Temperature: 3000° F
Density: 129 lbs./cu. ft.
Color: Gray

Lay, coat, and bond firebricks. Apply this mortar with a trowel. One pail sets approximately 40 bricks.

Container Net Weight, lbs.	Approximate Coverage		Each
15	40 Bricks	000000	000000

Abrasion-Resistant Firebrick Insulation

Temperature Range: 0° to 2900° F
Heat Flow Rate: 9.6 Btu @ 1500° F
Density: See Table
Color: Beige
Specifications Met: See Table

Stronger than standard firebricks but with lower insulation capabilities, these withstand heavy abrasion on the floors and sides of furnaces. They meet ASTM standards for flame resistance. Also known as hard firebricks. Cut with a diamond-tipped tile saw and install with firebrick bonding mortar (sold separately).

For technical drawings and 3-D models, click on a part number.

2" Thick.
Wd.	Lg.	Density, lbs./cu. ft.	Material	Specifications Met		Each
12"	12"	138	Clay/Ceramic	ASTM C-27	0000000	000000
12"	18"	138	Clay/Ceramic	ASTM C-27	0000000	000000
2 1/2" Thick.
4 1/2"	9"	140	Clay/Ceramic	ASTM E84 0/0 for Flame and Smoke	000000	00000
4 1/2"	13 1/2"	138	Clay/Ceramic	ASTM C-27	0000000	00000
6"	9"	138	Clay/Ceramic	ASTM C-27	0000000	00000
12"	12"	138	Clay/Ceramic	ASTM C-27	0000000	000000
3" Thick.
4 1/2"	9"	138	Clay/Ceramic	ASTM C-27	0000000	00000
6"	9"	138	Clay/Ceramic	ASTM C-27	0000000	00000
12"	12"	138	Clay/Ceramic	ASTM C-27	0000000	000000

Firebrick Bonding Mortar (15-lb. Pail)

000000

Each

000000

Extreme-Temperature Cement

Max. Temperature: 2500° F
Density: 122 lbs./cu. ft.
Color: Beige

Set and repair cast iron and steel furnaces, heaters, stoves, and boilers with this ready-to-use cement. It experiences minimal shrinkage for a permanent smokeproof and gasproof joint. Apply with a trowel or a spatula. A minimum temperature of 212° F is required to harden. Cut hardened cement with a carbide-tipped saw.

Container
Size	Type	Approximate Coverage, sq. ft.	Cure Temperature, °F		Each
8 fl. oz.	Pail	0.63	212°	0000000	00000
64 fl. oz.	Pail	5	212°	0000000	00000
1 gal.	Pail	10	212°	0000000	00000

Tabletop Forges

Heat metal quickly and evenly so it can be shaped. Connect these forges to a propane tank with the included fittings and hose, and ignite with the push of a button. No blower required. These forges reach temperatures of 2350° F within minutes, and an insulated front door retains the heat. Side ports allow you to heat long pieces, such as bar stock, from either end. Forge can be configured for use with natural gas. Operate only in well-ventilated spaces.

Floor stand is sold separately.

		Inside			Overall			Side Port
Cap., cu. in.	Max. Temperature, °F	Ht.	Wd.	Dp.	Ht.	Wd.	Dp.	No. of	Ht.	Wd.	Material	Includes		Each
216	2350°	3"	12"	6"	18"	16"	10"	2	1 1/2"	3"	Steel	Gauge, Hose, Regulator	0000000	0000000

Optional Floor Stand (47" Ht. × 18" Wd. × 16" Dp.)

0000000

Each

0000000