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Rock Bits catalog for the Oil, Gas, Mining and Construction Industries
GT ENGINEERING, INC. ® ROCK BITS Digital Catalog GT® History For decades, the Gault family has been providing quality rock bits to the drilling industry. What began as a small fabricating shop in Allen, OK is now a state of the art manufacturing facility in Shawnee, Oklahoma. Our attention to detail and hands-on philosophy have been demonstrated throughout this long history. By working closely with drillers, we developed our first jet bit in 1946 and patented it in 1950. This patent, (#2,524,428), was for the jetted rock bit that revolutionized the hydraulics at the bottom of the hole. Today this relationship is still evident when we are able to produce new and improved cutting structures for specific fields in a matter of weeks. We regularly expand our product line to meet more and more drilling challenges. Our in-house carbide plant allows us to produce high quality, specialty carbides for numerous applications. We are dedicated to improving manufacturing processes but we never shortchange our quality. Every bit we make is to the highest standards in materials, metallurgical processes and workmanship. This dedication ensures the consistency that drillers rely on day after day. GT® Advantages ELASTOMER SEAL RING Our seals are individually molded out of proprietary rubber. These O-rings are 100% inspected for size, shape and hardness before they are put into the rock bit. SILVER PLATED BECU BUSHING AND THRUST WASHER Every bushing is made from the highest grade of beryllium copper alloy, heat treated to exact specifications and machined to the closest tolerances to guarantee long life in each bit segment. SPECIALLY FORMULATED GREASE Our grease is a blend of grease that is degassed to prevent pressure build up in the high heat conditions that occur in the bit. PRESSURE COMPENSATOR The diaphragm in the grease reservoir transfers pressure from the drilling fluid to the grease. This provides a steady supply of lubrication to the bearing surfaces. HARDMETAL ON THE SHIRTTAIL A generous covering of the shirttail with hardmetal is applied to every journal. BRP PROTECTION The weldment holding the Ball Retaining Pin is protected by tungsten carbide buttons. This added protection provides an assurance that the balls will remain in the cone and the cone will remain on the bit. STAINLESS STEEL NOZZLE RETAINING RINGS Every bit shipped by GT has stainless steel nozzle retaining rings. These have proven to be stronger than the normal carbon steel retaining rings used by other manufacturers. CENTER HOLES Additional circulation can be obtained at the bottom of the hole by putting a hole in the middle of the bit. This is standard on all of our sealed bearing air circulation bits. GT® Bits are Made in the USA and Shipped World Wide (800)752-0812 (USA) • (405)395-0500 info@gtengineering.com www.gtengineering.com GT® Engineering, Inc. 7 American Way Shawnee, OK 74802 Bit photographs in this catalog are shown in grayscale for optimal clarity and detail. © GT® Engineering, Inc. 2 GT is a registered trademark of GT® Engineering, Inc. GT® ENGINEERING, INC. ROCK BITS Digital Catalog CATALOG INDEX IADC GT® BIT PAGE IADC GT® BIT PAGE IADC GT® BIT PAGE 4-1-7 04X 4 5-2-7 25X 12 5-4-7 38Y 20 4-1-7 09X 5 5-2-7 25Y 13 6-1-7 40A 21 4-2-7 12X 6 5-2-7 32X 14 6-1-7 42X 22 4-2-7 15X 7 5-3-7 30A 15 6-1-7 43X 23 4-2-7 18X 8 5-3-7 31A 16 6-2-7 44X 24 5-1-7 20X 9 5-3-7 33Y 17 6-2-7 44Y 25 5-1-7 22X 10 5-3-7 35X 18 6-3-7 45Y 26 5-1-7 24X 11 5-3-7 35Y 19 6-3-7 55Y 27 Mill Tooth Bits are made to order in the following sizes: 3-3/4", 3-7/8", 4-1/8", 4-1/4", 4-1/2", 4-5/8", 4-3/4", 5 1/8", 5-1/4", 5-1/2", 6-1/8", 6-1/4" CROSS REFERENCE IADC GT HUGHES SMITH REED SECURITY 4-1-7 GT 04X GX03 GFS04 TD41 XS03 4-1-7 GT 09X GX11 GFS05 TD42H XS09 4-2-7 GT12X GX-09 F1 TD43 XS09 4-2-7 GT 15X --- GFS10B TD43A XS13 4-2-7 GT 18X GX18 FH18 TD43H XS17 5-1-7 GT 20X --- --- HP51X XS23 5-1-7 GT 22X GX22 FH22 TD51X XS22 5-1-7 GT 24X GX23 FH23 HP51 XS23 5-2-7 GT 25X GX25 FH26 HP52X XS24 5-2-7 GT 25Y GT20C FH26 TD52H XS25 5-2-7 GT 27Y GX28C FH27 HP52 XS27 5-2-7 GT 32X GX30 FH30 R28AM XS31 5-3-7 GT 30A XL30A --- HP51A --- 5-3-7 GT 31A XL30A F27A HP53A --- 5-3-7 GT 33Y GX30C FH32 HP53 XS33 5-3-7 GT 35X GX35 FH35 TD53A XS33 5-4-7 GT 35Y GX38C F37Y TD53H XS35 5-4-7 GT 38Y GX38C F37Y TD54 XS37 5-4-7 GT 39Y GX38C F37Y TD54 XS39 6-1-7 GT 40A XL40A F47A TD61A --- 6-1-7 GT 42X GX44 F47 TD61 XS42 6-1-7 GT 43X GX44 F47 TD61 XS42 6-2-7 GT 44X GX44 F47 TD62 XS46 6-2-7 GT 44Y GX44C F43Y TD62 XS47 6-2-7 GT 45Y GX45C F47Y TD63 XS51 6-3-7 GT 55Y --- F57Y TD63 XS52 3 GT® ENGINEERING, INC. GT ROCK BITS ® 04X IADC 4-1-7 Application Range 4-1-7 thru 4-2-7 12 1/4” (311mm) Shown ASSY # 3540 PRODUCT APPLICATION Effective in low compressive strength, soft sedimentary formations DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 33º Seal Type: O-ring Number of Rows: 9 Inner Row Inserts: 42 - 3/4” & 7/8” Chisel Heel Row Inserts: 39 - 7/8” Chisel Bit Connection: 6 5/8” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 1500 - 4000 lb/in of bit diameter Normal Rotary Speed Range: 80 - 180 RPM CROSS REFERENCE Hughes: GX-03 Smith: GFS04 Reed: TD41 Security: XS03 AVAILABILITY INCHES METRIC 6 1/4 159 7 7/8 200 8 1/2 216 8 3/4 222.3 8 7/8 225 11 279.4 12 1/4 311.2 4 Digital Catalog GT® ENGINEERING, INC. GT ® 09X ROCK BITS IADC 4-1-7 Application Range 4-1-7 thru 4-3-7 8 3/4” (222mm) Shown ASSY # 3410 PRODUCT APPLICATION This bit has a very aggressive offset for an outstanding penetration rate in very soft and poorly consolidated formations. The small dome inserts keep the bit in gage without slowing it down. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 33º Seal Type: O-ring Number of Rows: 12 Inner Row Inserts: 50 - 9/16” Chisel Heel Row Inserts: 60 - 9/16” WCC & 1/4” Dome Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Uses same nozzles as 7 7/8” AVAILABLE OPTIONS Shirttail Protection AVAILABILITY OPERATING PARAMETERS Weight on Bit Range: 1500 - 5000 lb/in of bit diameter Normal Rotary Speed Range: 50 - 110 RPM CROSS REFERENCE Hughes: GT09 Smith: F1 Reed: HP43 Security: XS09, XS10 5 INCHES METRIC 6 152 6 1/8 156 8 3/4 222 Digital Catalog GT® ENGINEERING, INC. GT ® 12X ROCK BITS IADC 4-2-7 Application Range 4-2-7 thru 4-4-7 12 1/4” (311mm) Shown ASSY # 3900 PRODUCT APPLICATION Effective in low compressive strength, unconsolidated sands, shales, and soft sedimentary formations. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 33º Seal Type: O-ring Number of Rows: 12 Inner Row Inserts: 64 - 3/4” & 7/8” Chisel Heel Row Inserts: 41 - 3/4” Chisel Bit Connection: 6 5/8” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 1500 - 4000 lb/in of bit diameter Normal Rotary Speed Range: 80 - 180 RPM AVAILABILITY CROSS REFERENCE Hughes: GX09 Smith: F1 Reed: TD43 Security: XS09 6 INCHES METRIC 6 3/4 171 10 5/8 270 12 1/4 311 Digital Catalog GT® ENGINEERING, INC. GT ROCK BITS ® 15X Digital Catalog IADC 4-2-7 Application Range 4-2-7 thru 4-3-7 7 7/8” (200mm) Shown ASSY # 2710 PRODUCT APPLICATION Effective in low compressive strength, soft sedimentary formations. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 33º Seal Type: O-ring Number of Rows: 10 Inner Row Inserts: 47 - 9/16” Chisel Heel Row Inserts: 33 - 1/2” WCC Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 1500 - 4000 lb/in of bit diameter Normal Rotary Speed Range: 80 - 180 RPM AVAILABILITY CROSS REFERENCE Hughes: GT09 Smith: F1 Reed: TD43 Security: XS10 INCHES METRIC 7 7/8 200 This cutting structure has long, sharp chisel inserts on the inner rows and wedge-crested chisels on the gage row to rapidly cut through soft formations. 7 GT® ENGINEERING, INC. GT ® 18X ROCK BITS Digital Catalog IADC 4-2-7 Application Range 4-2-7 thru 5-1-7 7 7/8” (200mm) Shown ASSY # 2750 PRODUCT APPLICATION Effective in low compressive strength, soft sedimentary formations DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 33º Seal Type: O-ring Number of Rows: 10 Inner Row Inserts: 47 - 9/16” Chisel Heel Row Inserts: 33 - 1/2” WCC Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 1500 - 4000 lb/in of bit diameter Normal Rotary Speed Range: 80 - 180 RPM AVAILABILITY CROSS REFERENCE Hughes: GT09 Smith: F1 Reed: TD43 Security: XS10 8 INCHES METRIC 4 3/4 121 5 1/4 133 5 1/2 140 5 5/8 143 6 3/4 171 7 7/8 200 10 5/8 270 12 1/4 311 Slightly denser carbide drill pattern than the GT15X with the same offset for fast drilling through slightly harder formations. GT® ENGINEERING, INC. GT ® 20X ROCK BITS IADC 5-1-7 Application Range 5-1-7 thru 5-2-7 7 7/8” (200mm) Shown ASSY # 2850 PRODUCT APPLICATION Soft, low-compressive strength formations. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 33º Seal Type: O-ring Number of Rows: 10 Inner Row Inserts: 55 - 9/16” & 1/2” Chisel Heel Row Inserts: 37 - 9/16” Chisel Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 1500 - 4000 lb/in of bit diameter Normal Rotary Speed Range: 80 - 180 RPM AVAILABILITY CROSS REFERENCE Hughes: GT20 Smith: F2 Reed: TD51X Security: XS20 9 INCHES METRIC 6 1/8 156 6 1/2 165 7 7/8 200 8 1/2 216 8 3/4 222 Digital Catalog GT® ENGINEERING, INC. GT ROCK BITS ® 22X IADC 5-1-7 Application Range 5-1-7 thru 5-2-7 8 3/4” (200mm) Shown ASSY # 3740 PRODUCT APPLICATION Most effective in soft, low-compressive strength formations that respond to sharp, chisel inserts. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 33º Seal Type: O-ring Number of Rows: 10 Inner Row Inserts: 57 - 9/16” & 5/8” Chisel Heel Row Inserts: 44 - 9/16” Chisel Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset Uses same nozzles as 7 7/8” AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS AVAILABILITY Weight on Bit Range: 2000 - 5000 lb/in of bit diameter Normal Rotary Speed Range: 60 - 160 RPM INCHES METRIC CROSS REFERENCE Hughes: GX22 Smith: FH22 Reed: TD51X Security: XS22 AVAILABILITY INCHES METRIC 3 7/8 98 6 1/4 159 4 1/2 114 6 3/4 171 4 3/4 121 7 7/8 200 4 7/8 124 8 3/4 222 5 1/8 130 9 7/8 251 5 1/2 140 10 5/8 270 5 5/8 143 12 1/4 311 5 7/8 149 10 Digital Catalog GT® ENGINEERING, INC. GT ® 24X ROCK BITS IADC 5-1-7 Application Range 5-1-7 thru 5-2-7 8 3/4” (222mm) Shown ASSY # 3760 PRODUCT APPLICATION For use in soft, low-compressive strength formations that respond to the gouging, cutting action of more rounded inserts. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 33º Seal Type: O-ring Number of Rows: 10 Inner Row Inserts: 57 - 9/16” & 5/8” SC Chisel Heel Row Inserts: 44 - 9/16” WC Chisel Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset Uses same nozzles as 7 7/8” AVAILABLE OPTIONS Shirttail Protection AVAILABILITY OPERATING PARAMETERS Weight on Bit Range: 2000 - 5000 lb/in of bit diameter Normal Rotary Speed Range: 60 - 160 RPM INCHES METRIC 3 7/8 98 4 3/4 121 5 1/4 133 6 1/8 156 6 1/4 159 8 3/4 222 CROSS REFERENCE Hughes: GX23 Smith: FH23 Reed: HP51 Security: XS23 11 Digital Catalog GT® ENGINEERING, INC. GT ® 25X ROCK BITS Digital Catalog IADC 5-2-7 Application Range 5-1-7 thru 5-2-7 7 7/8” (200mm) Shown ASSY # 3510 PRODUCT APPLICATION Most effective in softer formations. Addition of dome shaped inserts in the gage row prevents undersize holes in abrasive formations. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 33º Seal Type: O-ring Number of Rows: 11 Inner Row Inserts: 59 - 9/16” Chisel Heel Row Inserts: 40 - 7/16” WCC & 3/8” Dome Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 2000 - 5000 lb/in of bit diameter Normal Rotary Speed Range: 60 - 160 RPM AVAILABILITY INCHES METRIC 5 1/8 130 7 7/8 200 11 279 CROSS REFERENCE Hughes: GX25 Smith: FH26 Reed: HP52X Security: XS24 12 The GT25X has sturdy chisel inserts on the inner rows and a combination of wedge-crested chisels and domes on the gage row to keep the hole in gage through more abrasive formations. GT® ENGINEERING, INC. GT ROCK BITS ® 25Y Digital Catalog IADC 5-2-7 Application Range 5-2-7 thru 5-3-7 7 7/8” (200mm) Shown ASSY # 2610 PRODUCT APPLICATION Most effective in soft to medium strength sedimentary formations. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 33º Seal Type: O-ring Number of Rows: 11 Inner Row Inserts: 64 - 9/16” Conical Heel Row Inserts: 41 - 7/16” WCC & 3/8” Dome Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 2000 - 5500 lb/in of bit diameter Normal Rotary Speed Range: 60 - 140 RPM CROSS REFERENCE Hughes: GT20C Smith: F27 Reed: TD521 Security: XS27 AVAILABILITY INCHES METRIC 7 7/8 200 11 279 13 Identical to the GT25X except it has substituted long, conical inserts in the inner rows. This is best used in formations that respond to conical inserts. GT® ENGINEERING, INC. GT ® 32X ROCK BITS IADC 5-2-7 Application Range 5-2-7 thru 5-3-7 8 3/4” (222mm) Shown ASSY # 3220 PRODUCT APPLICATION This bit is a very aggressive, medium bit; fast and tough. It has double gage packs to give it full heelrow protection to maintain gage. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 33º Seal Type: O-ring Number of Rows: 12 Inner Row Inserts: 90 - 9/16” Chisel Heel Row Inserts: 47 - 7/16” WCC Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset Uses same nozzles as 7 7/8” AVAILABILITY INCHES METRIC 4 1/2 114 5 7/8 149 6 1/8 156 6 1/2 165 8 1/2 216 8 3/4 222 AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 2000 - 5500 lb/in of bit diameter Normal Rotary Speed Range: 60 - 140 RPM CROSS REFERENCE Hughes: GX30 Smith: FH30 Reed: R28AM Security: XS31 14 Digital Catalog GT® ENGINEERING, INC. GT ® 30A ROCK BITS IADC 5-3-7 Application Range 5-2-7 thru 5-4-7 7 7/8” (200mm) Shown ASSY # 3110 PRODUCT APPLICATION Extra tough carbide buttons for air drilling. Minimal offset for extended bearing life. It also has standard nozzle sockets in case drilling needs to be done with mud. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 36º Seal Type: O-ring Number of Rows: 12 Inner Row Inserts: 71 - 3/8”, 7/16” & 1/2” Conical Heel Row Inserts: 48 - 7/16” WC Chisel Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Skip drilling provides smooth, fast drilling and eliminates tracking AVAILABLE OPTIONS Shirttail Protection AVAILABILITY INCHES METRIC 7 7/8 200 OPERATING PARAMETERS Weight on Bit Range: 3500 - 6000 lb/in of bit diameter Normal Rotary Speed Range: 40 - 80 RPM CROSS REFERENCE Hughes: XL30A Smith: F27A Reed: HP51A Security: - - - 15 Digital Catalog GT® ENGINEERING, INC. GT ® 31A ROCK BITS IADC 5-3-7 Application Range 5-3-7 thru 5-4-7 7 7/8” (200mm) Shown ASSY # 3870 PRODUCT APPLICATION Extra tough carbide buttons for air drilling. Minimal offset for extended bearing life. It also has standard nozzle sockets in case drilling needs to be done with mud. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 36º Seal Type: O-ring Number of Rows: 12 Inner Row Inserts: 73 - 7/16” & 1/2” Chisel Heel Row Inserts: 47 - 1/2” Dome Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Skip drilling provides smooth, fast drilling and eliminates tracking AVAILABLE OPTIONS Shirttail Protection AVAILABILITY OPERATING PARAMETERS Weight on Bit Range: 3500 - 6000 lb/in of bit diameter Normal Rotary Speed Range: 40 - 80 RPM INCHES METRIC 7 7/8 200 CROSS REFERENCE Hughes: XL30A Smith: F27A Reed: HP53A Security: - - - 16 Digital Catalog GT® ENGINEERING, INC. GT ROCK BITS ® 33Y IADC 5-3-7 Application Range 5-3-7 thru 5-4-7 7 7/8” (200mm) Shown ASSY # 3830 PRODUCT APPLICATION Most effective in medium hard formations that have frequent stringers of harder material. It combines the toughness of harder formations with the exposure of softer ones. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 36º Seal Type: O-ring Number of Rows: 11 Inner Row Inserts: 73 - 9/16” Conical Heel Row Inserts: 41 - 7/16” Dome Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset AVAILABILITY AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 3000 - 6000 lb/in of bit diameter Normal Rotary Speed Range: 50 - 110 RPM INCHES METRIC 5 1/8 130 5 1/4 133 7 7/8 200 CROSS REFERENCE Hughes: GX30C Smith: FH32 Reed: HP53 Security: XS33 17 Digital Catalog GT® ENGINEERING, INC. GT ROCK BITS ® 35X IADC 5-3-7 Application Range 5-3-7 thru 5-4-7 8 3/4” (222mm) Shown ASSY # 3790 PRODUCT APPLICATION Most effective in soft to medium formations with harder streaks. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 33º Seal Type: O-ring Number of Rows: 11 Inner Row Inserts: 66 - 9/16” & 5/8” Chisel Heel Row Inserts: 46 - 1/2” WCC Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Uses same nozzles as 7 7/8” AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 3000 - 6000 lb/in of bit diameter Normal Rotary Speed Range: 50 - 110 RPM CROSS REFERENCE Hughes: GX35 Smith: FH35 Reed: TD53 Security: XS33 This bit combines the aggressive skew with durable, chisel inserts that will provide a high rate of penetration and not be damaged by any hard stringers found in the well bore. AVAILABILITY AVAILABILITY INCHES METRIC INCHES METRIC 3 7/8 98 5 7/8 149 4 1/2 114 6 152 4 5/8 117 6 1/8 156 4 3/4 121 6 1/4 159 4 7/8 124 6 1/2 165 5 127 6 3/4 171 5 1/8 130 7 7/8 200 5 1/4 133 8 3/4 222 5 1/2 140 8 1/2 216 5 5/8 143 9 7/8 251 5 3/4 146 11 279 12 1/4 311 18 Digital Catalog GT® ENGINEERING, INC. GT ® 35Y ROCK BITS Digital Catalog IADC 5-4-7 Application Range 5-4-7 thru 6-1-7 7 7/8” (200mm) Shown ASSY # 2551 PRODUCT APPLICATION Most effective in medium-strength formations with streaks of harder materials. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 33º Seal Type: O-ring Number of Rows: 11 Inner Row Inserts: 69 - 9/16” Conical Heel Row Inserts: 40 - 7/16” WCC Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 3000 - 6000 lb/in of bit diameter Normal Rotary Speed Range: 50 - 110 RPM CROSS REFERENCE Hughes: GT30C Smith: F35 Reed: HP54 Security: XS30 AVAILABILITY INCHES METRIC 4 5/8 118 6 1/8 156 7 7/8 200 8 7/8 225 11 279 12 1/4 311 19 Identical to the GT35X but with conical inserts. This bit has wedge-crested, gage row inserts just like the GT35X. GT® ENGINEERING, INC. GT ® 38Y ROCK BITS Digital Catalog IADC 5-4-7 Application Range 5-4-7 thru 6-1-7 7 7/8” (200mm) Shown ASSY # 2630 PRODUCT APPLICATION Most effective in medium-strength formations with streaks of harder materials. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 33º Seal Type: O-ring Number of Rows: 11 Inner Row Inserts: 69 - 9/16” Conical Heel Row Inserts: 40 - 7/16” Dome Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 3000 - 6000 lb/in of bit diameter Normal Rotary Speed Range: 50 - 110 RPM CROSS REFERENCE Hughes: GT30C Smith: F37 Reed: TD54 Security: XS37 AVAILABILITY INCHES METRIC 4 7/8 124 5 1/2 140 5 5/8 143 6 1/4 159 6 3/4 171 8 3/4 222 20 Conical, inner-row inserts and domed, gage row inserts, situated on an aggressive skew, make this an ideal bit for medium-soft formations with harder streaks. GT® ENGINEERING, INC. GT ROCK BITS ® 40A IADC 6-1-7 Application Range 6-1-7 thru 6-2-7 8 3/4” (222mm) Shown ASSY # 3320 PRODUCT APPLICATION Small, tightly packed inserts provide a rapid penetration rate when using air drilling. Double rows of gage packs provide full, heel-row coverage. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 36º Seal Type: O-ring Number of Rows: 13 Inner Row Inserts: 97 - 1/2” Conical Heel Row Inserts: 58 - 7/16” Dome Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Dense Cutting Structure Minimal Offset Uses same nozzles as 7-7/8” AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 3500 - 6000 lb/in of bit diameter Normal Rotary Speed Range: 40 - 80 RPM CROSS REFERENCE Hughes: XL40A Smith: F47A Reed: TD61A AVAILABILITY INCHES METRIC 6 1/8 156 6 1/4 159 6 1/2 165 6 3/4 171 8 3/4 222 The GT40A is an extremely durable and aggressive air drilling, sealed-bearing bit. This bit has a very dense insert pattern of conical inserts on the inner rows and domed inserts on the gage rows. 21 Digital Catalog GT® ENGINEERING, INC. GT ROCK BITS ® 42X IADC 6-1-7 Application Range 5-4-7 thru 6-1-7 8 3/4” (222mm) Shown ASSY # 3840 PRODUCT APPLICATION Best used in medium formations with hard streaks. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 33º Seal Type: O-ring Number of Rows: 15 Inner Row Inserts: 107 - 3/8” & 7/16” Dome, 1/2” Chisel Heel Row Inserts: 50 - 7/16” Contoured Wedge Chisel Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset Uses same nozzles as 7-7/8” AVAILABILITY AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 3000 - 6000 lb/in of bit diameter Normal Rotary Speed Range: 50 - 110 RPM CROSS REFERENCE Hughes: GX44 Smith: F47 Reed: TD61 Security: XS42 Less skew than that found on the softer bits. The GT42X has chisel inserts throughout the cutting structure. The inserts on the gage row are wedge-crested chisels that enable it to cut effectively in medium formations. INCHES METRIC 3 3/4 95 4 5/8 118 4 7/8 124 5 127 5 1/8 130 5 1/4 133 5 1/2 140 6 1/8 156 6 1/4 159 6 1/2 165 8 1/2 216 8 3/4 222 22 Digital Catalog GT® ENGINEERING, INC. GT ROCK BITS ® 43X IADC 6-1-7 Application Range 6-1-7 thru 6-2-7 8 3/4” (222mm) Shown ASSY # 3860 PRODUCT APPLICATION The GT43X is best used in medium formations with hard streaks. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 36º Seal Type: O-ring Number of Rows: 15 Inner Row Inserts: 108 - 3/8” & 7/16” Dome, 1/2” Chisel Heel Row Inserts: 52 - 7/16” Dome Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset Uses same nozzles as 7 7/8” AVAILABILITY AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 3500 - 6000 lb/in of bit diameter Normal Rotary Speed Range: 40 - 80 RPM CROSS REFERENCE Hughes: GX44 Smith: F47 Reed: TD61 Security: XS42 INCHES METRIC 3 3/4 95 4 5/8 118 5 127 5 1/4 133 6 1/8 156 6 1/4 159 8 1/2 216 8 3/4 222 23 Digital Catalog GT® ENGINEERING, INC. GT ® 44X ROCK BITS IADC 6-2-7 Application Range 6-1-7 thru 6-2-7 8 3/4” (222mm) Shown ASSY # 3810 PRODUCT APPLICATION An aggressive bit designed to go through formations with high compressive strength with some harder stringers. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 36º Seal Type: O-ring Number of Rows: 15 Inner Row Inserts: 108 - 3/8” & 7/16” Dome, 1/2” Chisel Heel Row Inserts: 52 - 7/16” Dome Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset Uses same nozzles as 7 7/8” AVAILABILITY AVAILABLE OPTIONS Shirttail Protection INCHES METRIC 3 3/4 95 8 1/2 216 8 3/4 222 9 7/8 251 11 279 OPERATING PARAMETERS Weight on Bit Range: 3500 - 6000 lb/in of bit diameter Normal Rotary Speed Range: 40 - 80 RPM CROSS REFERENCE Hughes: GX44 Smith: F47 Reed: TD62 Security: XS46 24 Digital Catalog GT® ENGINEERING, INC. GT ® 44Y ROCK BITS IADC 6-2-7 Application Range 6-2-7 thru 6-3-7 8 3/4” (222mm) Shown ASSY # 3820 PRODUCT APPLICATION Effective in formations with high compressive strength with some harder stringers. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 36º Seal Type: O-ring Number of Rows: 15 Inner Row Inserts: 108 - 3/8” & 7/16” Dome, 1/2” Conical Heel Row Inserts: 52 - 7/16” Dome Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset Uses same nozzles as 7 7/8” AVAILABLE OPTIONS Shirttail Protection AVAILABILITY INCHES METRIC 4 5/8 118 4 3/4 121 4 7/8 124 5 127 5 1/8 130 6 152 6 1/8 156 6 1/2 165 7 7/8 200 8 3/4 222 OPERATING PARAMETERS Weight on Bit Range: 3500 - 6000 lb/in of bit diameter Normal Rotary Speed Range: 40 - 80 RPM CROSS REFERENCE Hughes: GX44C Smith: F43Y Reed: TD62 Security: XS47 The GT44Y has ovoid inserts on the gage row. It is most effective in harder formations. The GT44Y has proven itself with a rate of penetration superior to comparable bits. 25 Digital Catalog GT® ENGINEERING, INC. GT ® 45Y ROCK BITS Digital Catalog IADC 6-2-7 Application Range 6-1-7 thru 6-3-7 7 7/8” (200mm) Shown ASSY # 2410 PRODUCT APPLICATION Most effective in medium to medium hard formations. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 36º Seal Type: O-ring Number of Rows: 13 Inner Row Inserts: 80 - 1/2” Conical Heel Row Inserts: 48 - 7/16” Dome Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 3500 - 6000 lb/in of bit diameter Normal Rotary Speed Range: 40 - 70 RPM AVAILABILITY INCHES METRIC 3 3/4 95 5 1/8 130 6 3/4 171 8 3/4 222 CROSS REFERENCE Hughes: GX45C Smith: F47Y Reed: TD63 Security: XS51 26 Slightly more dense than the GT44Y for slightly harder and more abrasive formations. It too has ovoid inserts on the inner rows and domes on the gage row. GT® ENGINEERING, INC. GT ROCK BITS ® 55Y IADC 6-3-7 Application Range 6-2-7 thru 6-4-7 7 7/8” (200mm) Shown ASSY # 2800 PRODUCT APPLICATION Use in medium hard formations with abrasive qualities. DESIGN SPECIFICATIONS Bearing Type: Sealed Friction Journal Angle: 36º Seal Type: O-ring Number of Rows: 14 Inner Row Inserts: 79 - 1/2” Conical Heel Row Inserts: 45 - 7/16” Dome Bit Connection: 4 1/2” API Reg. SPECIAL FEATURES Silver Plated BeCu Bushing Silver Plated Thrust Washer Aggressive Cutting Structure Moderate Offset AVAILABLE OPTIONS Shirttail Protection OPERATING PARAMETERS Weight on Bit Range: 1500 - 4000 lb/in of bit diameter Normal Rotary Speed Range: 80 - 180 RPM CROSS REFERENCE Smith: F57Y Reed: TD63 Security: XS52 AVAILABILITY INCHES METRIC 3 3/4 95 4 5/8 118 5 127 5 1/8 130 5 1/4 133 6 152 6 1/8 156 6 1/4 159 6 3/4 171 7 7/8 200 27 Digital Catalog GT® ENGINEERING, INC. ROCK BITS Digital Catalog GT® Engineering, Inc. 7 American Way Shawnee, OK 74802 (800)752-0812 (USA) • (405)395-0500 info@gtengineering.com www.gtengineering.com This forging means you have a genuine GT® Bit. It means reliablity, performability, & superior ROP. GT04X 12 1/4” 28 Lit #64569GT_Engineering_Rock_Bits01-14-2015
