Identify the machine
PC/9.2 lists the Spectrum 375 X-TREME package as stock number 907529 with a 12 ft. XT30 torch and X-CASE.
Miller portable air plasma cutter
Miller Spectrum 375 X-TREME Plasma Cutter Machine Support
The Spectrum 375 X-TREME is a 120-240 V single-phase air plasma cutting system with Auto-Line circuitry, an XT30 hand-held torch, MVP plugs, and a 30 A consumable family. This page follows Miller specification sheet PC/9.2, issued October 2019.
Start Here
Use the shortest path for the Spectrum 375 machine, XT30 torch, consumables, or cutting problem.
Replace the XT30 torch
The supplied sheet lists the 12 ft. XT30 hand-held torch as part 249949.
Find consumables
The XT30 parts include the o-ring, swirl ring, electrode, 30 A tip, retaining cup, drag shield, and deflector.
Check cut quality
Start with the air supply, electrode, 30 A tip, drag shield, standoff, and material thickness.
Use an engine drive
Miller lists compatibility with an engine-driven welder or generator with a 240 V receptacle of 4 kW or more.
Open the Spectrum family
Use the broader family table when the machine is another Spectrum model or the torch family is uncertain.
Spectrum 375 X-TREME Specs
Core machine data transcribed from PC/9.2. The unit automatically adjusts output for the available input service.
What Comes With the Machine
Package contents called out on the first page of the Miller sheet.
- XT30 hand-held torch with a 12 ft. cable.
- Heavy-duty work clamp with 12 ft. flexible cable and quick connect.
- 10 ft. MVP power cord with 5-15P 120 V and 6-50P 240 V plugs.
- X-CASE protection, shoulder strap, and LED power, pressure, cup, and temperature indicators.
- Consumables box with two electrodes, two tips, one deflector, and an air fitting.
- Auto-Refire, LVC line-voltage compensation, and automatic air regulation features from the Miller sheet.
Cutting Notes
Confirm the input service before using the cutting chart.
- At 30 A, the sheet lists 1/4 in. mild steel at approximately 36 ipm and 3/8 in. at approximately 18 ipm.
- At 20 A on 120 V / 15 A service, the sheet lists 1/8 in. mild steel at approximately 50 ipm and 1/4 in. at approximately 17 ipm.
- Recommended maximum piercing is 3/16 in. at 30 A and 1/8 in. at 20 A.
- Maximum sever cut is 5/8 in. at 30 A and 3/8 in. at 20 A, both at approximately 6 ipm.
- For aluminum and other high-thermal-conductivity metals, Miller notes that cutting capability may be reduced by as much as 30%.
- Miller recommends a 30 A branch circuit for maximum performance; reducing output can help minimize nuisance breaker or line-fuse tripping on a 20 A branch service.
Machine Package and Accessories
Ordering rows from PC/9.2. Direct buy buttons appear only where an approved Miller registry match is available.
| Part / stock | Item | Catalog use | Buy / lookup |
|---|---|---|---|
| 907529 | Spectrum 375 X-TREME 12 ft. package | 120-240 V power source with 12 ft. XT30 hand-held torch and X-CASE. | View on Amazon Site lookup |
| 300184 | X-CASE Carrying case | Protection and storage for the Spectrum 375 X-TREME, accessories, and gear. | View on Amazon Site lookup |
| 300517 | Full KVA adapter cord Power accessory | Field NEMA 14-50P to NEMA 6-50R adapter for engine-drive 120/240 V output. | View on Amazon Site lookup |
| 253520 | XT30 consumable kit Consumable kit | Five electrodes, five tips, one swirl ring, one retaining cup, one o-ring, and silicone grease. | View on Amazon Site lookup |
| 252951 | Silicone grease Consumable accessory | Listed as an accessory for the XT30 torch and consumable service. | Search Amazon Site lookup |
| 253054 | Plasma standoff roller guide Cutting guide | Helps maintain recommended standoff distance to improve cutting performance and tip life. | View on Amazon Site lookup |
| 253055 | Plasma circle-cutting guide Cutting guide | Cuts straight lines or circles up to 12 in. diameter. | View on Amazon Site lookup |
| 195979 | Suction/magnetic pivot base Cutting guide accessory | Attachment for a cutting guide on flat surfaces; the extended arm accommodates holes up to 30 in. | View on Amazon Site lookup |
XT30 Torch Path
The PC/9.2 ordering table lists the 12 ft. hand-held XT30 as part 249949.
| Part | Torch | Use | Buy / lookup |
|---|---|---|---|
| 249949 | XT30 hand-held torch 12 ft. | Replacement torch for the Spectrum 375 X-TREME package. Confirm the XT30 family before ordering consumables. | View on Amazon Open XT30 support Site lookup |
XT30 Consumables
Use the XT30 family and 30 A configuration together when selecting replacement parts.
| Part | Item | Use | Buy / lookup |
|---|---|---|---|
| 249969 | O-ring | Common XT30 consumable component. | View on Amazon Site lookup |
| 249931 | Swirl ring | Common XT30 consumable component. | View on Amazon Site lookup |
| 249926 | Electrode | Common XT30 consumable component. | View on Amazon Site lookup |
| 249927 | 30 A tip | XT30 cutting tip; confirm the torch family before ordering. | View on Amazon Site lookup |
| 249932 | Retaining cup | Common XT30 consumable component. | View on Amazon Site lookup |
| 249930 | Drag shield | Protects the tip and supports template cutting. | View on Amazon Site lookup |
| 249933 | Deflector | Alternate front-end part shown with the XT30 torch. | View on Amazon Site lookup |
Additional Accessories
PC/9.2 also lists air filtration, work cable, MVP plugs, safety glasses, and shared cutting accessories.
| Part | Accessory | Catalog note | Buy / lookup |
|---|---|---|---|
| 228926 | In-line air filter kit | Includes 1/4 in. NPT quick disconnect fittings and hose; filter element to .85 microns. | View on Amazon Site lookup |
| 228928 | Replacement filter element | Replacement element for in-line air filter kit 228926. | View on Amazon Site lookup |
| 263799 / 263800 | Flexible work cable | 263799 for 12 ft.; 263800 for 20 ft.; both include quick connect and heavy-duty clamp. | 12 ft. 20 ft. Lookup |
| 219258 / 219261 / 219259 | MVP plugs | 6-50P 240 V / 50 A included; 5-15P 120 V / 15 A included; 5-20P 120 V / 20 A optional. | 6-50P 5-15P 5-20P |
| 235658 / 235657 / 235659 | Shade 5 safety glasses | Black, blue, and orange frame options; recommended by Miller for plasma work. | Search Amazon Site lookup |
| 272205 / 272209 | Slag safety glasses | Black and white frame options; shade 5 lens family listed in the catalog. | Search Amazon Site lookup |
Source: Miller Electric Spectrum 375 X-TREME specification sheet PC/9.2, issued October 2019, pages 1-4. Compatibility and accessory descriptions are transcribed from the supplied Miller literature. Amazon links are optional buying aids; direct buttons are limited to approved Miller registry matches.