1. BAB TIGA ( 3 )KIKIR ( FILE ) DISEDIAKAN OLEH : HASNUL MUNAWAR BIN GHANI POLITEKNIK JOHOR BAHRU JABATAN KEJURUTERAAN MEKANIKAL
2. FILE SHAPE Flat file * Cutting face are parallel to one another *cutting teeth on both edges *suitable for reducing to size and shape/ fit finishing Mill file * Thinner and smaller than flat file *have only one row of teeth * Suitable in small slot Hand file * Teeth on only one edge * suitable in filling of a shoulder or internal edge of a square/rectangular Square file * Equal widths on each cutting face * suitable for enlarging square and rectangular cut-outs Round file * Also call as ‘rats tail’ * suitable for enlarging or elongating holes/for filling the inner diameter of tightly curved surfaces Half Round file * One face flat, other rounded* suitable in enlarging big diameter holes and same times use for filling gentle curves Triangular file * Teeth on all surfaces (including the corners) *Suitable for restoring threads and gear teeth, also for get a round file started
3. TEETH Rasp cutraised teeth used for cutting soft materials Single cutthe file has a single row of teeth, making for smooth cuts Double cuttwo rows of teeth arranged at an angle to each other
4. Selecting a file for the job 1. Teeth coarseness : - too coarse 1) make very deep scratches 2) potentially take off too much material - less coarse 1) will take longer time to do job 2) potentially safe way File shape : - large flat surface, pick widest file - enlarging a hole, pick the largest round file that fit the hole Try first before you file
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6. One hand holds the file, other hand firmly grasps the other end.
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8. One hand holds the file, other hand holds the end with finger tips.
