Qns: What is the size range and maximum depth that can perform at site?
The machine can thread up to M180 with maximum depth of 250mm.
Qns: What is the lead time needed to have the service at site?
We prefer a 3-day lead time to prepare and test the equipment before deploying it to the site. For applications involving the main engine or machinery that require precise hole locating, the template will need an estimated 3 to 5 working days for proper preparation and accuracy.
Qns: Can you briefly describe the thread repair process?
There are 2 options for bolt hole repair:
- Enlarge the bolt hole size, for example from M85 to M90 etc. such method require to change the stud or bolt size to match.
- Enlarge the bolt hole and insert a custom-made sleeve bushing (material: high tensile 4140 steel) with both external and internal threads (the internal thread matches the original bolt hole size). Screw the sleeve bushing into the repaired hole with Loctite, then drill and tap three additional holes to securely ‘lock’ the sleeve bushing in place. This solution allows you to reuse the original bolt or stud.
Qns: Why is a machined templated required when carry out the thread repair process?
The template serves two critical functions:
- Mounting Equipment for Perpendicularity:
It ensures the equipment is mounted in a way that ensures the perpendicular of the new threaded hole relative to the top surface. This is crucial, especially for long studs, where even a slight deviation in the thread hole’s angle can lead to significant misalignment at the upper part of the stud. - Identifying the Center of Damaged Threads:
The template is also used to accurately identify the center of the damaged threaded hole by referencing the undamaged surrounding bolt holes, ensuring precision in the re-threading process
Qns: Why a site inspection, videos and photos is required?
In addition to the footprint area required for our equipment, it’s essential to ensure the surrounding working space allows for adequate movement of the CNC machine’s axis. This space is necessary to give the machine ample room to manoeuvre during operations.
Given the critical nature of the threading process on the main engine, our specialists must closely monitor the machine’s performance and be ready to intervene immediately if required. Therefore, it’s important to allocate sufficient working space around the equipment to accommodate our specialists and ensure smooth and precise operations.
Qns: Is different tooling needed for each bolt hole size?
Since the machine utilizes an interpolation method for threading through a milling process, each bolt size with a different pitch requires its own specific cutting tool, as outlined below.
Qns: What are the pre-requist site preparation on the engine before receiving our equipment and crew?
As our crew will be working on the main engine, it is essential that the engine’s cooling system is flushed and allowed to rest for 5 hours before beginning the machine installation. This cooling period ensures that the working environment reaches a tolerable temperature, enabling our team to carry out continuous operations.
It’s crucial that each threading cycle is completed without interruption once started. Pausing midway could result in incomplete or interrupted threads, which may lead to issues such as the stud jamming or not tightening fully. Proper preparation will help maintain the integrity and precision of the threading process.
Qns: What is the power requirement for your equipment?
3 phase 415V, single phase 230v and 110v AC.
