SHENLI promotes YT27, YT28 and YT29A air leg drills for tunneling and mining

SHENLI has published a procurement guide for its YT27, YT28 and YT29A air leg rock drills, aimed at tunneling and underground mining buyers choosing equipment by rock hardness, tunnel size and air supply. The guide also highlights factory testing, ISO9001:2015 and CE certifications, and spare-part support as buying priorities.

Why it matters: - Tunneling and underground mining operations depend on drills that match rock conditions, space constraints and compressed-air capacity. - A poor equipment choice can slow footage, increase operator fatigue and drive up maintenance costs. - SHENLI is positioning its YT series as a procurement option for mixed-ground, medium-hard and hard-rock jobs.

What happened: - SHENLI Machinery Trading Co., Ltd. published a procurement guide for YT27, YT28 and YT29A air leg rock drills. - The guide targets tunneling crews, underground mining faces, quarries and infrastructure projects. - The company frames the YT series as a practical choice for daily abuse in wet, abrasive and high-vibration drilling conditions.

The details: - SHENLI says its drills use internal cylinders and valve chests ground to a 3-micron fit with CNC milling to reduce air bypass and improve hitting power. - The company says piston and rifle bar components are quenched in sealed, atmosphere-controlled furnaces to improve wear resistance and toughness. - SHENLI says its backhead controls use a mechanical linkage designed to keep air and water flow separate during wet drilling. - Built-in rubber dampeners are intended to reduce hand-arm vibration. - The YT27 weighs about 27 kilograms and runs on 0.4 to 0.6 MPa air lines. - The YT27 drills holes from 34 to 45 millimeters wide and up to 5 meters deep. - The guide positions the YT27 for mixed geology, medium-sized tunnels and local quarries. - The YT28 weighs 26 kilograms and is described as the standard model for medium to hard rock and high-speed production drilling. - SHENLI says the YT28 valve chest is designed to cycle the piston faster while using less air volume than older machines. - The YT28 back head centralizes controls for water, leg pressure and impact power. - The YT29A weighs 29 kilograms and is aimed at extra-hard granite, abrasive quartz and iron ore. - SHENLI says the YT29A uses a wider cylinder bore for greater impact energy. - The YT29A is paired with an FT160A air leg for steep upward drilling and straighter hole control. - The guide says buyers should verify that site air lines and compressor banks can support multiple drills running at once. - SHENLI says the lineup covers standard YT series and heavier pneumatic configurations for fleet planning. - The company says it operates under ISO9001:2015 and CE certifications. - SHENLI says every drill is tested on a dynamic testing platform for torque, air seals and blow frequency before shipping. - The company says wear parts including water needles, pawls, rifle nuts and rotation sleeves are kept ready for immediate shipment. - The guide says the YT series includes built-in oil tanks, reinforced steel front heads and balanced handles to support durability and reduce vibration. - More information is available in the official site.

Between the lines: - The guide is as much a sales document as a buying checklist. - Its core message is that drill selection should be driven by geology, tunnel geometry and service support rather than catalog specs alone. - The emphasis on spare parts and testing suggests SHENLI is trying to reduce one of the biggest buyer fears in mining equipment: downtime.

What's next: - Buyers can review the full catalog, request custom setups and arrange shipping through SHENLI’s website. - Procurement teams will likely compare the YT27, YT28 and YT29A against site air supply, tunnel layout and required hole diameter before purchasing. - The company’s next step is to convert the guide’s technical claims into orders from contractors and mine operators.