Abstrak:Penelitian pengembangan bahan ajar dalam bentuk jobsheet ini dilakukan dalam dua tahap. Tahap pertama adalah tahap pengembangan draft jobsheet di tahun 2014. Tahap kedua merupakan tahap implementasi di tahun 2015 dengan tujuan untuk mengetahui: (1) hasil penilaian ahli, dosen dan mahasiswa; (2) kendala-kendala selama uji coba; dan (3) kelayakan draf jobsheet sebagai bahan ajar praktik. Penelitian ini menggunakan model pengembangan Dick & Carey pada tahap review dan uji coba penelitian melibatkan 2 orang ahli, 6 orang dosen pengampu mata kuliah, dan 26 orang mahasiswa jurusan teknik mesin. Data diperoleh dengan menggunakan angket tertutup dan terbuka. Data yang terkumpul berupa tanggapan dan saran perbaikan dianalisis secara deskriptif kualitatif sedangkan data yang merupakan hasil penilaian terhadap jobsheet terpadu dianalisis secara deskriptif kuantitatif. Hasil pengujian menyatakan: (1) isi sangat layak (uji ahli); desain/media sangat layak (uji ahli, perorangan, kelomok kecil; uji lapangan layak (mahasiswa) dan sangat layak (dosen); (2) berdasarkan hasil uji isi dan desain hingga uji lapangan, ada beberapa komponen yang masih perlu direvisi. Dapat disimpulkan bahwa draf bahan ajar dinyatakan layak sebagai bahan ajar praktik. Penelitian ini hanya sampai pada tahap evaluasi formatif pada Jobsheet Praktik Pengujian Bahan dan Metrologi. Diharapkan dilakukan penelitian lebih lanjut untuk mengetahui efektifitasnya dalam upaya meningkatakan kompetensi mahasiswa.Kata Kunci: Pengembangan; jobsheet terpadu; praktik pengujian bahan dan metrologi; kompetensi; politeknikAbstract:This research on jobsheet learning material development was carried out in two phases. First phase was jobsheet drafting in 2014. The second phase was the implementation in 2015 with the objectives of knowing: (1) evaluation from the experts, lecturers, and students; (2) constraints during the trial test; and 3) feasibility of the jobsheet draft as practical learning material. This research applied the development model of Dick & Carey in review phase and involved 2 experts, 6 respective lecturers, as well as 26 mechanical engineering students in the trial test. The data were collected through close and open questionnaires. Response and recommendation data were analyzed with descriptive qualitative method, whereas the data of evaluation on the integrated jobsheet were analyzed with descriptive quantitative method. The testing resulted in: (1) content was highly feasible (by expert); design/media was very feasible (experts, individuals, small groups); field trial test was feasible (students) and very feasible (lecturers); (2) based on the results of the whole test, there were some components that still needed to be improved. It can be concluded that the learning material draft was feasible to become practical learning materials. This research was carrioud out only up to the phase of formative evaluation on the Material and Metrology Test Practical Jobsheet. Further research is expected to know the effectiveness of it in enhancing the students’ competence.Keywords: Development; integrated jobsheet; material and metrology test practice; competence; polytechnic

Steel twist is often happened on machine component that is the axis that its main function to continue power and circle. So, the choosing of axis substance that will be used is very important to know the strength of its twist, so it is safe to be used. This research is the research continuation that is has ever done before. Steel as technical material is often used as machine components, the strength to the external load is very needed to be known before it is used. The external load that is often happened to the machine component is twist load, pull load, bend load, and pound load. This research analyze the standard steel twist St.42 after it is heated at 800'C temperature with quick cooling, using plain water that is done in material test laboratory, majors in Machine Technical, Bali State Polytechnic. The research is aimed to get how big is the St.42 steel strength changes and its twist angle changes after being heated until 800'C and being quick cooled by using plain water, infact it becomes more tough and becomes more twist endure compared to standard St.42 steel. Its strength changes shows there is twist strength improvement until 38, 549%, that is from 503,7021855 (N/mm2) becomes 697,8735409(N/mm2), thus the steel angle arises, even the specific twist angle arises from 0,959385993 ('/mm) becomes 9.403372244('/mm)..