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ROCK BITS - GT Engineering
3 7/8” - 12 1/4” ROCK BITS Digital Catalog Current January, 2008 GT® ENGINEERING, INC. 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 Bit Page 04X 3 09X 4 15X 5 18X 6 22X 7 23X 8 24X 9 25X 10 25Y 11 31X 12 33Y 13 35X 14 35Y 15 38Y 16 40A 17 40AG 18 42X 19 43X 20 44X 21 44Y 22 45Y 23 55Y 24 This forging means you have a genuine GT® Bit. It means reliablity, performability & superior ROP. GT04X 12 1/4” GT® Bits are Made in the USA and Shipped World Wide GT® Engineering, Inc. 7 American Way Shawnee, OK 74802 (405)395-0500 info@gtengineering.com www.gtengineering.com Cross Reference Coming Availability Coming Bit photographs in this catalog are shown in grayscale for optimal clarity and detail. GT is a registered trademark of GT® Engineering, Inc. 2 © GT® Engineering, Inc. GT® ENGINEERING, INC. GT ® Rock Bits IADC 417 Application Range 417 - 427 04X ASSY # 3540 12 1/4” (311mm) 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 Reed: TD41 Security: XS03 Smith: GFS04 12 1/4” (311mm) 8 3/4” (222MM) 3 Digital Catalog GT® ENGINEERING, INC. GT Rock Bits ® IADC 437 Application Range 427 - 447 09X 7 7/8” (200mm) 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 6” (152mm) OPERATING PARAMETERS Weight on Bit Range: 1500 - 5000 lb/in of bit diameter Normal Rotary Speed Range: 50 - 110 RPM CROSS REFERENCE Hughes: GT09 Reed: HP43 Security: XS09, XS10 Smith: F1 4 6” (152mm) Digital Catalog GT® ENGINEERING, INC. GT Rock Bits ® 15X Digital Catalog IADC 437 Application Range 427 - 437 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 This bit has very blunt ovoid inserts on the inner rows and domes on the gage row for very hard and abrasive formations that have a high compressive strength. CROSS REFERENCE Hughes: GT09 Reed: TD43 Security: XS10 Smith: F1 5 GT® ENGINEERING, INC. GT ® 18X Rock Bits Digital Catalog IADC 447 Application Range 437 - 517 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 CROSS REFERENCE Hughes: GT09 Reed: TD43 Security: XS10 Smith: F1 Slightly denser carbide drill pattern than the GT15X with the same offset for fast drilling through slightly harder formations. 6 GT® ENGINEERING, INC. GT ® 22X Rock Bits IADC 517 Application Range 517 - 527 8 3/4” (200mm) Shown ASSY # 3740 PRODUCT APPLICATION Most effective in soft, low-compressive strength formation 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 Weight on Bit Range: 2000 - 5000 lb/in of bit diameter Normal Rotary Speed Range: 60-160 RPM CROSS REFERENCE Hughes: GX22 Reed: TD51X Security: XS22 Smith: FH22 7 Digital Catalog GT® ENGINEERING, INC. GT ® 23X Rock Bits IADC 517 Application Range 517 - 527 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 OPERATING PARAMETERS Weight on Bit Range: 2000 - 5000 lb/in of bit diameter Normal Rotary Speed Range: 60 - 160 RPM CROSS REFERENCE Hughes: GX23 Reed: HP51 Security: XS23 Smith: FH23 8 Digital Catalog GT® ENGINEERING, INC. GT ® 24X Rock Bits IADC 517 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 CROSS REFERENCE Hughes: GT20 Reed: TD51X Security: XS20 Smith: F2 9 Digital Catalog GT® ENGINEERING, INC. GT ® 25X Rock Bits Digital Catalog IADC 517 Application Range 437 - 527 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 CROSS REFERENCE Hughes: GX25 Reed: HP52X Security: XS24 Smith: FH26 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. 10 GT® ENGINEERING, INC. GT ® 25Y Rock Bits Digital Catalog IADC 527 Application Range 527 - 537 7 7/8” (200mm) Shown ASSY # 2610 PRODUCT APPLICATION Most effective in soft to medium strength sedimetary 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 Identicle 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. CROSS REFERENCE Hughes: GT20C Reed: TD521 Security: XS27 Smith: F27 11 GT® ENGINEERING, INC. GT ® 31X Rock Bits IADC 527 Application Range 527 - 537 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” 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 Reed: R28AM Security: XS31 Smith: FH30 12 Digital Catalog GT® ENGINEERING, INC. GT ® 33Y Rock Bits IADC 537 Application Range 537 - 547 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 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: GX30C Reed: HP53 Security: XS33 Smith: FH32 13 Digital Catalog GT® ENGINEERING, INC. GT ® 35X Rock Bits Digital Catalog IADC 537 Application Range 537 - 547 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 Reed: TD53 Security: XS33 Smith: FH35 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. 14 GT® ENGINEERING, INC. GT ® 35Y Rock Bits Digital Catalog IADC 547 Application Range 547 - 617 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 Identicle to the GT35X but with conical inserts. This bit has wedge-crested, gage row inserts just like the GT35X. CROSS REFERENCE Hughes: GT30C Reed: HP54 Security: XS30 Smith: F35 15 GT® ENGINEERING, INC. GT ® 38Y Rock Bits Digital Catalog IADC 547 Application Range 547 - 617 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 Reed: TD54 Security: XS37 Smith: F37 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. 16 GT® ENGINEERING, INC. GT Rock Bits ® 40A IADC 617 Application Range 617 - 627 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 Reed: TD61A Smith: F47A 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. 17 Digital Catalog GT® ENGINEERING, INC. GT ® 40AG Rock Bits IADC 617 Application Range 617 - 627 11” (279mm) 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: 33º 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 Reed: TD61A Smith: F47A 18 Digital Catalog GT® ENGINEERING, INC. GT ® 42X Rock Bits IADC 617 Application Range 547 - 617 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” 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 Reed: TD61 Security: XS42 Smith: F47 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. 19 Digital Catalog GT® ENGINEERING, INC. GT ® 43X Rock Bits IADC 617 Application Range 617 - 627 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” 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 Reed: TD61 Security: XS42 Smith: F47 20 Digital Catalog GT® ENGINEERING, INC. GT ® 44X Rock Bits IADC 627 Application Range 617 - 627 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” 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 Reed: TD62 Security: XS46 Smith: F47 21 Digital Catalog GT® ENGINEERING, INC. GT Rock Bits ® 44Y IADC 627 Application Range 627 - 637 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 OPERATING PARAMETERS Weight on Bit Range: 3500 - 6000 lb/in of bit diameter Normal Rotary Speed Range: 40 - 80 RPM CROSS REFERENCE Hughes: GX44C Reed: TD62 Security: XS47 Smith: F43Y 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. 22 Digital Catalog GT® ENGINEERING, INC. GT ® 45Y Rock Bits IADC 627 Application Range 617 - 637 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 CROSS REFERENCE Hughes: GX45C Reed: TD63 Security: XS51 Smith: F47Y 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. 23 Digital Catalog GT® ENGINEERING, INC. GT ® Rock Bits IADC 637 55Y 7 7/8” (200mm) 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 Reed: TD63 Security: XS52 Smith: F57Y 6 1/4” (159mm) 24 Digital Catalog
