Pneumatic Demon Drill
The Demon is a stand-mounted rock drill: BTE Mid-Western’s S83 production drill on an integrated pneumatic feed stand, so stroke, rotation, and percussion all run off one compressed-air circuit and nobody spends the shift leaning on a handheld tool. It runs at 2,300 BPM and takes a 7/8 x 4-1/4 or 1 x 4-1/4 chuck to match your steel, covering the same 5/8 to 3 in. and larger hole range as the rest of the S83 platform — with no hydraulic power pack and no electric feed to haul in. Quarry benches, aggregate pits, and foundation crews use it for blast-hole and anchor-bolt drilling. Shop the S83 Demon drill, read the BTE Mid-Western Demon page, compare the handheld sinker and jackleg builds of the same drill, or browse the wider rock drilling and BTE Mid-Western ranges. Ships from Denver.
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One Platform, Three Configurations
BTE Mid-Western builds the S83 percussion motor in the United States and mounts it three ways. Handheld it is the S83 Sinker Drill; on a feed leg it is the S83 Jackleg Drill; on the pneumatic feed stand it is the Demon. Same chuck options, same hole range, same spare parts bin — the practical argument for standardizing a crew on one platform.
Why a Feed Stand
Feed pressure from a stand is steady and repeatable, so the bit stays loaded and the hole stays straight. The operator sets up and indexes instead of carrying the drill through a shift, which is what makes bench patterns and long rows of anchor bolts practical.
Air, Steel, and Bits
Size an air compressor to the drill’s consumption at working pressure, run rock drill oil in the line, and build the string with carbide bits matched to the chuck you ordered. Because feed, rotation, and percussion all draw from the same circuit, an undersized compressor shows up as slow feed before it shows up as slow penetration — check delivered CFM at the tool, not at the machine.
Common Questions
What is a Demon drill? BTE Mid-Western’s name for the S83 rock drill on an integrated pneumatic feed stand — a stand-mounted production drill for blast holes and anchor bolts, running entirely on compressed air at 2,300 BPM.
Is the Demon a drifter drill? It works the way a drifter does — a percussion drill carried on a powered feed rather than by hand — but on a self-contained air feed stand instead of a boom or jumbo. For a leg-fed version, see the jackleg drills.
What size holes will it drill? The S83 platform covers 5/8 in. up to 3 in. and larger, depending on the steel and bit you run. Order the 7/8 x 4-1/4 or 1 x 4-1/4 chuck to match steel you already have.
Do I need a power pack for it? No. There is no hydraulic or electric feed — one compressed-air circuit runs stroke, rotation, and percussion, so a compressor is the whole power supply on site.