| d F7 | d1 m6 | L -0.10 -0.30 |
| 8 | 10 | 12 | 15 | 16 | 20 | 25 | 30 | 35 | 40 | 50 | 60 | 70 | 80 |
| 8 | 0.028 0.013 | 12 | 0.018 0.007 | ● | ● | ● | ● | | | | | | | | | | |
| 10 | 14 | ● | ● | ● | ● | | ● | | | | | | | | |
| 12 | 0.034 0.016 | 18 | | ● | ● | ● | ● | ● | ● | ● | | | | | | |
| 13 | 19 | 0.021 0.008 | | ● | | ● | ● | | | | | | | | | |
| 14 | 20 | | ● | ● | ● | | ● | ● | ● | | | | | | |
| 15 | 21 | | ● | ● | ● | ● | ● | ● | ● | | | | | | |
| 16 | | 22 | | ● | ● | ● | ● | ● | ● | ● | ● | ● | | | | |
| 18 | 24 | | | ● | ● | ● | ● | ● | ● | ● | ● | | | | |
| 20 | 0.041 0.020 | 28 | | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | | | |
| 22 | 32 | 0.025 0.009 | | | ● | ● | | ● | ● | | | | | | | |
| 25 | 33 | | | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | | |
| 30 | 38 | | | ● | ● | | ● | ● | ● | ● | ● | ● | ● | | |
| 35 | 0.050 0.025 | 45 | | | | | | ● | ● | ● | ● | ● | ● | ● | | |
| 40 | 50 | | | | | | ● | ● | ● | ● | ● | ● | ● | ● | ● |
| 45 | 55 | 0.030 0.011 | | | | | | | | ● | ● | ● | ● | ● | | |
| 50 | 60 | | | | | | | | ● | ● | ● | ● | ● | ● | ● |
JDB-5 ialah produk tetulang siri JDB. Ia berasaskan keluli GCr15 dan dibenamkan dengan pelincir pepejal. Ia mempunyai kekuatan mampat yang tinggi dan amat sesuai untuk menyokong kedudukan dalam mesin pengehosan, cth. Sokongan atau dirian cermin kereta dan kren. Walau bagaimanapun, ia tidak boleh digunakan dalam air atau dalam keadaan asid/alkali. Ia boleh digunakan di bawah beban rendah, tengah dan tinggi. Oleh kerana kekerasannya yang luar biasa tinggi, apabila di bawah beban tinggi, ia mengatasi jenis JDB yang lain. Tidak sesuai untuk keadaan air, asid atau alkali. Paling sesuai untuk kedudukan sokongan mesin angkat, cth. penyokong jentolak, penyokong pengangkat, penyokong mesin kekili, dsb.
Data Teknikal
| Indeks prestasi | Data |
| Kekerasan Bass | HRC58-60 | Had PV | 2.5N/mm2.m/s |
| Pekali geseran (μ) | <0.17 | Had beban dinamik | 250N/mm2 |
| Had suhu | 350°C | Had laju | 0.1m/s |
| Kod | Gcr15 | Bahan boleh dihasilkan mengikut spesifikasi pelanggan. |