SPECIFICATIONS & TOLERANCES

Mighty Watt® Swaged Cartridge Heaters
Nom. Dia.
In.
Actual Dia.
In.
Maximum Wattage Minimum Wattage (MW) Max. Amps
120V 240V 1" Length 1-1/2" Length 2" Length MW MX
MW MX MW MX 120V 240V 120V 240V 120V 240V
1/8" .121 -- 325 -- 650 -- -- 16 55 10 38 -- 2.7
1/4 .246 500 400 1,000 800 58 222 33 123 23 84 4.3 3.3
5/16 .308 500 400 1,000 800 58 222 33 123 23 84 4.3 3.3
3/8 .371 900 800 1,800 1,650 43 162 22 80 16 55 7.5 7.0
1/2 .496 1,250 1,050 2,500 2,150 28 101 16 54 11 36 10.5 9.0
5/8 .621 2,200 1,500 4,400 3,000 21 75 14 46 10 31 18.5 12.5
3/4 .746 3,000 1,950 6,000 3,950 20 69 12 41 9 27 25 16.6
15/16 .933 3,000 1,950 6,000 3,950 -- -- 12 41 9 27 25 16.5
1 .996 3,250 2,350 6,400 4,650 -- -- 8 32 5 21 27 19.5
1-1/4 1.245 3,250 2,350 6,400 4,650 -- -- 8 32 5 21 27 19.5
TOL ± .002*  * Diameter Tolerance on 15/16, 1 and 1-1/4, ±.003
Lead Length: 36" maximum on MX heaters. Additional lead length can be spliced.
Resistance Tolerance: +10%, ­5%.
Wattage Tolerance: +5%, ­10%.
Cold Resistance: 3% Lower than Hot Resistance.
Length Tolerance: ±3/32" up to 4-1/2" long. Above 4-1/2"; ±2%.
Camber Tolerance: .0016" per inch of length. In longer heaters larger camber may occur.
Standard Unheated Section: 3/8" at lead end, 3/8" at bottom on MW style. See corresponding description for cold section at lead end for all lead variations. Cold sections can be reduced or increased.
1/8" Diameter Tolerances: Wattage; +10%, ­15%. Length over 4-1/2"; ±3%
Other diameters available: 7/16", 9/16", 11/16" and 7/8".
 
Mighty Watt® (Metric) Swaged Cartridge Heaters
Nom.
Dia.
mm
Actual
Dia.
mm
Maximum Wattage Minimum Wattage (MW) Max. Amps
120V 240V 25mm Length 38mm Length 51mm Length MW MX
MW MX MW MX 120V 240V 120V 240V 120V 240V
6.5 6.4 500 400 1,000 800 58 222 33 123 23 84 4.3 3.3
8.0 7.9 500 400 1,000 800 58 222 33 123 23 84 4.3 3.3
10.0 9.91 900 800 1,800 1,650 43 162 22 80 16 55 7.5 7.0
12.5 12.4 1,250 1,050 2,500 2,150 28 101 16 54 11 36 10.5 9.0
16.0 15.88 2,200 1,500 4,400 3,000 21 74 14 46 10 31 18.5 12.5
20.0 19.9 3,000 1,950 6,000 3,950 20 69 12 41 9 27 25 16.5
TOL ± .05mm  
Lead Length: 900mm maximum on MX heaters. Additional lead length can be spliced.
Resistance Tolerance: +10%, ­5%.
Wattage Tolerance: +5%, ­10%.
Cold Resistance: 3% Lower than Hot Resistance.

Length Tolerance: ±2.4mm up to 115mm long. Above 115mm; ±2%
Camber Tolerance: .16mm per 100mm of length. In longer heaters larger camber may occur.

Standard European tolerances available

Other.Metric.Diameters.Available
Diameter mm Actual mm
6.0
11.0
12.0
14.0
15.0
17.0
19.0
5.89
10.92
11.89
13.89
14.89
16.89
18.90
Tolerance ± .05MM
 
Bullet® Swaged Cartridge Heaters
Nom.
Dia.
In.
Actual
Dia.
In.
Maximum Wattage Minimum Wattage (BL)

Max. Amps

120V 240V 1-1/4" Length 1-1/2" Length 2" Length
BL BX BL BX 120V 240V 120V 240V 120V 240V
1/4 .246 500 450 1,030 925 54 207 40 150 26 95

4.3

3/8 .371 720 650 1,440 1,320 38 143 28 102 14 48

6

1/2 .496 1,200 900 2,400 1,800 -- -- 21 74 14 48

8

5/8 .621 1,800 1,250 3,600 2,500 -- -- 18 66 11 37

10

3/4 .746 2,400 1,550 4,800 3,100 -- -- 15 49 9 29

14

TOL ± .002  
Lead Length: 36" maximum on BX. Additional length can be spliced.
Resistance Tolerance: +10%, ­5%.
Wattage Tolerance: +5%, ­10%.
Cold Resistance: 3% Lower than Hot Resistance.
Length Tolerance: ±3/32 up to 4-1/2" long. Above 4-1/2"; ±2%.
Camber Tolerance: .0016" per inch of length. In longer heaters larger camber may occur.
Standard Unheated Section: 1/2" at lead end, 1/4" at bottom
 

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