HBR-20P Blasting Machine - MSHA Approved
MTi Group's HBR-20P: built specifically for underground mining operations. This MSHA-approved device promises uninterrupted functionality with its rapid charging capabilities. It has advanced safety features and sturdy design, ensuring precision in any conditions.
Live pricing and same-day-ship priority once you're in. Setup takes 60 seconds — we just need to confirm you're a real operation.
- P.O.
Why HBR-20P Blasting Machine - MSHA Approved
MSHA approved safety
Carries full MSHA approval for use in US mining operations. Tested and certified.
Why it matters: Meets the regulatory bar your site requires. No permit issues, no compliance gaps.
Weatherproof design
Sealed housing withstands rain, humidity, and temperature swings.
Why it matters: Performs consistently whether it's a cold morning or a wet afternoon shift.
Secure binding posts
Heavy-duty posts lock lead wires firmly. Designed for gloved-hand operation.
Why it matters: Fast, positive connections even with thick work gloves. No fumbling at the firing point.
Rapid charging feature
Reaches full firing energy in seconds with clear ready indication.
Why it matters: You spend less time waiting at the face. Charge, confirm, fire — fast and predictable.
Durable battery life
Long-life batteries support hundreds of firing cycles before replacement.
Why it matters: Fewer battery swaps in the field. More confidence the machine will fire when you need it.
Strap attachment points
Built-in attachment points for lanyards and carry straps.
Why it matters: Secure the machine to your person. No risk of dropping it down a heading or off a bench.
Built for the bench.
MSHA approved
Approved for underground use in MSHA-regulated operations.
Built to last
Compact, rugged housing designed for the abuse of underground work.
Specs, storage & more.
| MSHA Approval No. | 16E-15 ELECTRIC INITIATION |
| FIRING ENERGY | FIRING CAPABILITY: FIRING CAPACITY: |
| SHUNT TIMING | FIRE CIRCUIT: ARMED INDICATOR: CHARGING TIME: |
| DIMENSION | WEIGHT: CASE MATERIAL: HARDWARE: INGRESS: COLORS: |
| BATTERIES | LIFE: |
| CONNECTION | SWITCHES: BATTERY: |
| OUTPUT | ABORT: |
| Battery type | AA |
| Output voltage | 350 |
| Output energy (joules) | 6.125 |
| Max resistance (ohms) | N/A |
| Rated cap count | 20 |
| Firing cycles per battery | ~200+ |
| Initiation type | Electric |
| Length | 9" |
| Width | 4" |
| Height | 4" |
| Weight | 2lbs |
| Waterproof | Yes |
| MSHA approved | Yes |
| CE approved | No |
| Pack size | Each |
Pick the right machine.
Every shot.
Detailed Specifications
 HB-10 Electric Initiator
|
 HB-55 Electric Blasting Machine
|
 S-355 Compact Electric Blasting Machine
|
 HB-SBS Blasting Machine - Dual Initiation
|
 HB-320 Rugged Waterproof Blasting Machine
|
 S-412 Blasting Machine with Circuit Continuity
|
 HBR-20P Blasting Machine - MSHA Approved
|
 S-2 Non-Electric Blasting Machine
|
 S-3 Powerful Blasting Machine
|
 S-27 Blasting Machine
|
 HR-3 Mechanical Starter
| |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Initiation Type | Electric | Electric | Electric | Dual Initiation | Electric | Electric | Electric | Non-Electric | Dual Initiation | Non-Electric | Mechanical |
| Firing Cycles Per Battery | ~300+ | ~300+ | ~300+ | ~250+ | ~150+ | ~250+ | ~200+ | — | ~250+ | — | — |
| Battery Type | 9V | 9V | 9V | 9V | AA | 9V | AA | — | 9V | — | — |
| Output Volts DC | 150 | 225 | 350 | 450 | 330 | 400 | 350 | 400 x 2 | 400 | 400 | 400 |
| Output Joules | 1.25 | 4 | 5 | 5 | 19 | 12 | 6.125 | 12 x 2 | 12 | 12 | 12 |
| Initiation Resistance (ohms) | 50 | 135 | 230 | 250 | 220 | 240 | N/A | — | 240 | — | — |
| Estimated Single Series Caps | 20 | 62 | 110 | 120 | 105 | 115 | 20 | — | 115 | — | — |
| Waterproof | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | — |
| MSHA Approved | ✗ | ✗ | ✗ | ✗ | ✗ | ✗ | ✓ | ✗ | ✗ | ✗ | ✗ |
| Rapid Charging | ✓ | ✓ | ✓ | ✗ | ✓ | ✗ | ✓ | ✗ | ✗ | ✗ | ✗ |
| Detachable Belt Loop | ✓ | ✗ | ✓ | ✗ | ✗ | ✓ | ✓ | ✓ | ✓ | ✗ | ✗ |
| Continuity Indicator | ✗ | ✓ | ✓ | ✗ | ✗ | ✓ | ✗ | ✗ | ✓ | ✗ | ✗ |
| CE Approved | ✓ | ✗ | ✗ | ✗ | ✓ | ✗ | ✗ | ✗ | ✗ | ✗ | ✗ |
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Pick the HB-10 when you are firing small construction shots and want a compact, hand-held electric initiator. 50-ohm capacity, 9V battery, fits on your belt. Roughly 20 caps per single series.
Pick the HB-55 for mid-sized electric shots that need built-in circuit continuity verification. 135 ohm capacity, fires roughly 62 caps in single series.
Pick the S-355 when you need 230-ohm capacity in a compact form factor. Continuity indicator built in, rapid charge, fires roughly 110 caps per single series.
Pick the HB-SBS when crews switch between electric and shock-tube circuits. Auto-detects what is connected. 250-ohm electric capacity, fires roughly 120 caps single series.
Pick the HB-320 for large production circuits and harsh environments. 220-ohm capacity, 19-joule output, AA-battery powered, CE approved. Roughly 105 caps single series.
Pick the S-412 for large electric shots where pre-fire continuity verification is critical. 240-ohm capacity, continuity indicator, fires roughly 115 caps single series.
Pick the HBR-20P for underground coal and gassy metal/non-metal mines. MSHA-approved permissible unit, auto-shunts output 4.5–8 ms after firing. AA battery, roughly 20 caps single series.
Pick the S-2 for shock-tube firing on large surface benches. Two 400-volt outputs, 12 joules each. Immune to stray current and RF energy.
Pick the S-3 when you need a high-energy dual-initiation machine. 12-joule output, 240-ohm capacity, continuity indicator. Fires roughly 115 caps single series.
Pick the S-27 as a robust non-electric shock-tube firing device. 400-volt, 12-joule output. Heavy-duty build for production benches.
Pick the HR-3 when you want a battery-free mechanical starter for shock-tube initiation. No electronics, no batteries, no charging — a reliable backup for any non-electric circuit.
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