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Portable Boring Machine End Turning Attachment

Modular end‑face processing accessory for on‑site boring operations

Product Overview

The end turning attachment is a dedicated end‑face processing accessory engineered specifically for the portable boring machine. As a modular extended‑function component, it mounts directly onto a 60 mm diameter boring bar without requiring disassembly of the main boring structure. It enables on‑site turning of hole end faces, flange sealing surfaces, and similar workpieces, while allowing boring and end‑face machining to be completed in a single clamping setup. This attachment is widely used for field maintenance of large construction machinery, port equipment, marine rudder shaft holes, and other heavy‑duty applications.

Product Parameters

Compatible Boring Bar Diameter	60 mm (2.3 in)
Maximum End‑face Turning Diameter	≤ 500 mm (19.7 in)
Maximum Radial Feed Travel	250 mm (9.8 in)
Maximum Single‑Side Cutting Depth	0.5 mm (0.02 in)
Machined Surface Roughness	Ra ≤ 3.2 μm
Flatness of Machined End Face	0.1 mm (0.004 in)
Applicable Spindle Speed Range	0–100 rpm
Tool Post Compatibility	Fits standard boring tools and end‑face turning tools
Packing Dimensions	46 × 19.5 × 16 cm (18.11 × 7.68 × 6.30 in)
Net Weight / Gross Weight	13.2 kg (29.1 lb) / 14.1 kg (31.1 lb)

Precaution

Before operation, confirm that both ends of the boring machine are firmly supported without looseness and that the boring bar shows no obvious deformation. Never start end‑turning machining unless the supports are fully locked.
Operators must wear safety goggles and dust masks. Install safety warning barriers around the working area. Unauthorized personnel are prohibited from entering the 1‑meter machining radius to avoid injuries from flying metal chips.
Do not touch rotating components or cutting surfaces with hands during machining. Measurement and cleaning shall be carried out only after the equipment has come to a complete stop and the power supply has been disconnected.
Strictly limit the maximum cutting depth to no more than 2 mm. Overloaded operation is prohibited to prevent machine failures such as spindle stalling, slide‑table deformation, or boring bar bending.
Inspect the tension of the feed drive chain before each use. Apply grease promptly if the chain lacks lubrication. For long‑term storage, detach the chain, clean it thoroughly, and soak it in anti‑rust oil for preservation.
In case of abnormal vibration or noise during machining, press the emergency stop button immediately, cut off the power supply, and troubleshoot the fault. Restarting is forbidden until the issue is completely resolved.
Do not use the attachment to machine workpieces harder than the cutting blade, so as to prevent blade chipping and excessive wear of the slide guide rails.
For daily storage, place the attachment in a dry, well‑ventilated environment to prevent guide‑rail corrosion and dust accumulation on precision transmission parts. Perform full cleaning and lubrication of the sliding guide rails and lead screws after every 10 uses.

Product Features

1. Modular Quick‑Assembly Design

The attachment uses a split construction that allows rapid installation and removal on the boring bar without special tools, making it well suited for confined on‑site working spaces.

2. Coaxial Datum Guarantee

It takes the boring bar spindle as the rotation datum, fully inheriting the centering precision of the boring operation. This ensures accurate alignment between the machined inner hole and the end face, eliminating deviations caused by secondary clamping.

3. High‑Rigidity Durable Structure

Engineered to maintain stable operation even under heavy cutting conditions, the structure resists deformation during long‑term use, delivering consistent performance over extended service life.

Operation Method

1. Preparation Work
After completing the boring process and verifying that the inner hole meets precision requirements, stop the spindle rotation and cut off the main power supply. Clean away chips and grease from the boring bar surface, and confirm that the bar has no axial play.
2. Installation of End Turning Attachment
Align the central mounting base of the attachment with the positioning groove of the 60 mm boring bar and push it into place. Tighten the radial fixing bolts to prevent relative sliding. Install the radial feed slide table and connect the feed drive chain. Verify that the slide table moves smoothly without jamming throughout the full stroke.
3. Tool Installation
Select the appropriate blade based on the material and precision requirements of the end face. Mount the turning tool onto the tool post, adjust the tool tip height to match the boring bar center, and secure the tool fixing screw. Rotate the boring bar manually for one full revolution to confirm no collision or interference between the tool and the workpiece.
4. Parameter Commissioning
Switch on the main power supply, set the spindle speed to 15–30 rpm, and turn the feed speed knob to the lowest gear. Jog the spindle manually for a trial run to verify stable operation without abnormal vibration.
5. Trial Cutting
Move the slide table to let the tool tip lightly contact the end face, and record the initial scale. Retract the tool and set a cutting depth of 0.1 mm. Start the spindle for the first trial cut, then stop to measure the machining accuracy. Fine‑tune the cutting parameters based on the measurement results.
6. Formal Machining
Complete end‑face turning with stock allocation: 2–3 mm single‑side allowance for rough machining and 0.1–0.3 mm for finish machining. Remove chips in real time during processing to prevent iron scraps from scratching the finished surface.
7. Disassembly & Final Arrangement
Stop spindle rotation and cut off the main power supply after machining. Loosen the fixing bolts and remove the attachment from the boring bar. Clean away chips and grease, apply anti‑rust oil to the sliding guide rails, and store the attachment in its dedicated toolbox.

Item Included (022015): 1 × Portable Boring Machine End Turning Attachment