NZG-31ⅡD型内燃钢轨钻孔机，是专门用于对铁路钢轨进行电务钻孔的专用设备。本机由发动机、离合器、减速机构、进给系统、冷却系统、夹轨装置、钻头等部件组成。

● 动力：四冲程汽油发动机，转速平稳、故障率低、经济环保、可靠耐用。

● 减速机构：采用空气冷却油脂润滑齿轮减速结构。该机构传动扭矩大、噪音低、 耗能少、振动小、效

  率高。具有结构简单、可靠耐用、故障率低、保养维修方便的特点。

● 动力传输方式：离合器连接发动机与减速箱，动力均匀无损传输。

● 进给方式：手控推套齿条进给。力矩大、速度均匀、运转平稳、操作省力、使用安全。

● 夹轨装置：手压杠杆快速夹紧，装夹迅速、定位准确、操作简单、使用方便。

● 冷却系统：气压式强制冷却，自动给水，可有效地润滑和冷却钻头，延长其使用寿命。

● 整机：无须外来动力，携带方便。

NZG-31 II D diesel rail drilling machine is specially used for special equipment for rail electric drill.The machine consists of engine, gear reducer, feeding system, cooling device, rail clamping device and hollow drilling tools.

● Power: imported four-stroke engine as power source, strong power, stable revolution, seldom failure, and reliable function.

● Tools: quality high speed alloy-steel made multi-edge drilling tools with a hole inside.

● Gearing mechanism: composed with one group of precise gears

● Power transmission mode: clutch is connected to engine and gear box, no power loss during transmission. When the resistance of drilling and grinding increasing, the power can be cut off timely to protect engine and gear box.

● Feeding mode: gasoline electric manual control, rack feeding mode. It has features of big feeding torque, even speed, stable running and easy operation.

● Clamping device: rapid clamping of hand press lever, quick clamping, accurate positioning, and convenient operation.

● Pitch positioning and chuck: specialized pitch positioning ruler and chucking claw for various type of rails

● Cooling system: pneumatic type, enforcing air cooling. Effectively lubricating and cooling the drilling bit.

● The machine doesn’t need outside power source and it has good portability.