HEAD CHANGE REAMERS BTA-R SERIES SINGLE TUBE SYSTEM - OUTER FOUR START THREAD Diameter 0.725 - 2.559 d2 d1 l1 L Dimension Tube Grade Designation D L l1 d1 d2 Outer tube Inner tube Diameter TB103 BTA-Rx.xxxDE4-18-xxx 0.725 - 0.756 2.24 0.85 0.551 0.630 BTDO018 BTDI012 0.709 BTA-Rx.xxxDE4-18-xxx 0.756 - 0.787 2.24 0.85 0.551 0.630 BTDO018 BTDI012 0.709 BTA-Rx.xxxDE4-19.5-xxx 0.796 - 0.823 2.56 0.85 0.630 0.709 BTDO019.5 BTDI014 0.768 BTA-Rx.xxxDE4-19.5-xxx 0.823 - 0.858 2.56 0.85 0.630 0.709 BTDO019.5 BTDI014 0.768 BTA-Rx.xxxDE4-21.5-xxx 0.859 - 0.902 2.56 0.85 0.689 0.768 BTDO021.5 BTDI015 0.846 BTA-Rx.xxxDE4-21.5-xxx 0.902 - 0.949 2.56 0.85 0.689 0.768 BTDO021.5 BTDI015 0.846 BTA-Rx.xxxDE4-23.5-xxx 0.949 - 0.992 2.56 0.85 0.748 0.827 BTDO023.5 BTDI016 0.925 BTA-Rx.xxxDE4-23.5-xxx 0.993 - 1.039 2.56 0.85 0.748 0.827 BTDO023.5 BTDI016 0.925 BTA-Rx.xxxDE4-26-xxx 1.040 - 1.083 2.56 0.96 0.827 0.925 BTDO026 BTDI018 1.024 BTA-Rx.xxxDE4-26-xxx 1.083 - 1.130 2.56 0.96 0.827 0.925 BTDO026 BTDI018 1.024 BTA-Rx.xxxDE4-28-xxx 1.130 - 1.173 2.76 0.96 0.906 1.004 BTDO028 BTDI020 1.102 BTA-Rx.xxxDE4-28-xxx 1.174 - 1.220 2.76 0.96 0.906 1.004 BTDO028 BTDI020 1.102 BTA-Rx.xxxDE4-30.5-xxx 1.221 - 1.264 2.76 0.96 1.004 1.102 BTDO030.5 BTDI022 1.201 BTA-Rx.xxxDE4-30.5-xxx 1.264 - 1.311 2.76 0.96 1.004 1.102 BTDO030.5 BTDI022 1.201 BTA-Rx.xxxDE4-33-xxx 1.311 - 1.370 2.76 1.20 1.063 1.181 BTDO033.0 BTDI024 1.299 BTA-Rx.xxxDE4-33-xxx 1.370 - 1.425 2.76 1.20 1.063 1.181 BTDO033.0 BTDI024 1.299 BTA-Rx.xxxDE4-35.5-xxx 1.426 - 1.469 3.23 1.20 1.181 1.299 BTDO035.5 BTDI026 1.398 BTA-Rx.xxxDE4-35.5-xxx 1.469 - 1.512 3.23 1.20 1.181 1.299 BTDO035.5 BTDI026 1.398 BTA-Rx.xxxDE4-35.5-xxx 1.512 - 1.559 3.23 1.20 1.181 1.299 BTDO035.5 BTDI026 1.398 BTA-Rx.xxxDE4-39-xxx 1.559 - 1.598 3.23 1.20 1.299 1.417 BTDO039 BTDI029 1.535 BTA-Rx.xxxDE4-39-xxx 1.599 - 1.646 3.23 1.20 1.299 1.417 BTDO039 BTDI029 1.535 BTA-Rx.xxxDE4-39-xxx 1.646 - 1.693 3.23 1.20 1.299 1.417 BTDO039 BTDI029 1.535 BTA-Rx.xxxDE4-42.5-xxx 1.693 - 1.744 3.23 1.20 1.417 1.535 BTDO042.5 BTDI032 1.673 BTA-Rx.xxxDE4-42.5-xxx 1.744 - 1.795 3.23 1.20 1.417 1.535 BTDO042.5 BTDI032 1.673 BTA-Rx.xxxDE4-42.5-xxx 1.796 - 1.850 3.23 1.20 1.417 1.535 BTDO042.5 BTDI032 1.673 BTA-Rx.xxxDE4-46.5-xxx 1.851 - 1.909 3.23 1.36 1.555 1.693 BTDO046.5 BTDI035 1.831 BTA-Rx.xxxDE4-46.5-xxx 1.910 - 1.972 3.23 1.36 1.555 1.693 BTDO046.5 BTDI035 1.831 BTA-Rx.xxxDE4-46.5-xxx 1.973 - 2.035 3.23 1.36 1.555 1.693 BTDO046.5 BTDI035 1.831 BTA-Rx.xxxDE4-51-xxx 2.036 - 2.094 3.66 1.36 1.713 1.850 BTDO051 BTDI039 2.008 BTA-Rx.xxxDE4-51-xxx 2.095 - 2.154 3.66 1.36 1.713 1.850 BTDO051 BTDI039 2.008 BTA-Rx.xxxDE4-51-xxx 2.154 - 2.213 3.66 1.36 1.713 1.850 BTDO051 BTDI039 2.008 BTA-Rx.xxxDE4-55.5-xxx 2.213 - 2.299 3.66 1.36 1.870 2.008 BTDO055.5 BTDI043A 2.185 BTA-Rx.xxxDE4-55.5-xxx 2.300 - 2.386 3.66 1.36 1.870 2.008 BTDO055.5 BTDI043A 2.185 BTA-Rx.xxxDE4-55.5-xxx 2.386 - 2.472 3.66 1.36 1.870 2.008 BTDO055.5 BTDI043A 2.185 BTA-Rx.xxxDE4-55.5-xxx 2.473 - 2.559 3.66 1.36 1.870 2.008 BTDO055.5 BTDI043A 2.185 Example: BTA-R0.726SE4-12-B45 • B = chip backward design (F = chip forward design, available for through holes) • Diameter of reamer: 0.726" • Entering angle: 45 deg. Operating guidelines on page 714. = on request 652