
Technical Information for XN Type Threading Technical Information forXN Type Threading Insert vs. Toolholder Orientation API Thread Forms •Insert Applications Chart for API Rotary Shouldered Connections chuck chuck anti-clockwise rotation anti-clockwise rotation externalinternal Thread form cresting non - cresting tool joint application minimum box size * 2 - 3 / 8 API internal flush feed r 7° V - . 038 R 2 - 7 / 8 API internal flush 3 - 1 / 2 API internal flush 4 API internal flush 4 -1 / 2 API internal flush _ _ 7° pressure flank of the thread being XNTB-2LA XNTB- 3LA IT XNTB-2RA XNTB-3RA i i i i seating surface in bar 2 " TPF 4 TPI XNDC - 4038 R / L 2 4 - E / IR4API 382 XND - 3038 R / L 5 -1 / 2 API internal flush 6 - 5 / 8 API internal flush API # 31 2 - 7 / 8 IF the leading flank ' - 7° l XNTB-4LA XNTB-4RA I/ feei seating surfac 4 API full hole insert ~ " ^ irTtoolholder notch ’ API # 23 , API # 26 , API # 31 , 7° pressure flank API # 35 , API # 38 , API # 40, XNTB-2RA API # 44 , API # 46 , API # 50 of the thread being XNTB-3RA the leading flank insert XNTB-4RA NTB-2LA API # 56 notch V - . 038 R NTB- 3LA XNDC - 4038 R / L 3 API # 61 3 " TPF XND - 3038 R / L API # 56 4 - E / IR4API 383 API # 70 NTB-4LA 4 TPI API # 77 External Buttress Internal Buttress 7° pressure flank leading 7° pressure flank leading V- . 050 5 - 1 / 2 API full hole XNDC - 4050 R / L 2 2 " TPF XND - 4050 R / L 6 - 5 / 8 API regular 5 - 1 / 2 API full hole 4 - E /IRAPI 502 4 TPI 6 - 5 / 8 API full hole Reference Dimensions Infeed Angle vs. Chip Load: 7° Pressure Flank Leading V-. 050 5 - 1 / 2 API regular XNDC - 4050 R / L 3 .010" infeed 3 " TPF XND - 4050 R / L 7 - 5 / 8 API regular 5 - 1 / 2 API regular 4 TPI 4 - E / IR4API 503 h— A 8 - 5 / 8 API regular . 010" infeed i .007" chip load nose radius .0039" .0052" T 2 - 3 / 8 API regular V- . 040 XNDC - 3040 R / L 3 XND - 3040 R / L 2 - 7 / 8 API regular chip loac chip load .0012"- 3 " TPF XNDC - 4040 R / L 3 3 - 1 / 2 API regular D chip load XND - 4040 R / L 3 - 1 / 2 API regular 5 TPI 4 - E / IR 5 API 403 4 - 1 / 2 API regular maximum depth with A -style insert * Minimum box size that can be threaded with a standard Top Notch insert due to minimum bore equipment. 15° infeed angle XNTB-A insert 0° infeed angle feed direction feed direction API Thread Forms •Product Thread Dimensions • Rotary Shouldered Connections ( Inch ) 063 064 thread D A nose radius pitch based on thread root width of flat radius at Insert height , crest root ( inch ) ( inch ) ( inch ) maximum radius Thread taper inch height , truncation thread pitch not truncation radius XNTB - 2 0.133 0.024 0.002 - 0.004 16 - 20 TPI form per ft truncated Sm — Srs corners P truncated fcn= fcs crest crest rm= rs hn= hs fm — frs r XNTB - 3 0.171 0.031 0.005 - 0.008 8 - 16 TPI H fen — fes fm = frs XNTB - 4 0.218 0.049 0.008 - 0.012 4 - 6 TPI V- 0.38 R 2 0.216005 0.121844 0.038000 0.056161 0.065 0.038 0.015 0.250 NOTE : For balanced chip load , 15 ° infeed angle is suggested. V - 0.38 R 3 0.215379 0.121381 0.380000 0.055998 0.065 0.038 0.015 V - 0.40 3 0.172303 0.117842 0.200000 0.034461 0.040 0.020 0.015 0.250 V - 0.50 3 0.215379 0.147303 0.250000 0.043076 0.050 0.025 0.015 Internal Threading Limitations V - 0.50 2 0.216005 0.147804 0.250000 0.043201 0.050 0.025 0.015 0.250 internal threading limitations internal threading limitations XNTB - 2 A Buttress threading inserts XNTB - 3 and XNTB - 4 A Buttress threading inserts NOTE : All dimensions in inches . minimum minor minimum minor TPI nominal thread size TPI nominal thread size diameter ( inch ) diameter ( inch ) 8 1 - 3/ 4 1.600 4* 2- 1 / 2 2.200 10 1 -5/8 1.505 5 2- 1 / 4 2.010 V-. 040 and V- . 050 Product Thread Form Casing and Tubing Round Thread (Height Dimensions ) 12 1 -1 / 2 1.400 6 2 1.800 P 16 1 -1 / 4 1.175 8 1- 3 / 4 1.600 box 10 TPI 8 TPI thread element \ p = . 1000 p=.1250 1- 1/ 16 1- 5 / 8 i >\ ^CS 20 1.002 10 1- 1 / 2 1.505 , H = .866 p 0.08660 0.10825 12 ** 1.400 H tv , r ^ CS Hs = hs = .626 p - . 007 0.05560 0.07125 * NTB - 4A insert only. I — Srs Sm = . 120 p +. 002 0.01400 0.01700 * * Can cut 16 or 20 threads per inch provided minor diameter is 1.375 " or larger. Scs — Sen f, 1 =.120 p + .005 0.17000 0.02000 Threads per Inch vs. Maximum Root Radius Chart ( Inch ) cn axis of thread pin / 90° i TPI maximum root 20 0.0036 16 0.0045 12 0.0059 10 0.0071 8 0.0089 6 0.1190 5 0.0143 4 0.0179 3 0.0238 2- 1 / 2 0.0286 2.0 0.3750 1 - 1 /2 0.0476 1-1 /4 0.0572 0.0714 1 radius NOTE : Special Buttress forms are available upon request .