R-193 B-7 4140 High Strength Anchor Bolts

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The R-193 Anchor Bolt™ is specifically designed for reciprocating engines/compressors and other critical alignment equipment, where maximum clamping forces are necessary to prevent frame movement.

Quality control and enhancements above and beyond ASTM A193 specifications are why the R-193 Anchor Bolt™ is setting new standards for the industry.

Enhancements include double-spherical washers, a machined frangible section, shot peening of the frangible section and rolled threads, and a RotoBolt™ load monitor. These additions to a 125,000 psi, high-strength chromium-molybdenum anchor bolt (meeting ASTM A193 specifications) combined with our stringent quality control program, separate the R-193 from other common anchor bolts.

Our quality control program includes shot peening to mil spec. No. S-13165-C and the ability to trace our bolts back to the original mill lot run.

The RotoBolt™ load monitor provides a quick and accurate (+/-5%) check of bolt torque or clamping force. The R-193 Anchor Bolt™ is an invaluable part of any anchor bolt maintenance program.

Double-spherical washers, made from heat treated 4140 and through hardened to ASTM 436 specifications, ensure uniform nut loading, and compensate for vertical bolt misalignment and out of level, mating nut bosses.

The frangible section allows the bolt to stretch properly within its elastic limits. The required bolt stretch is imperative to achieve and maintain proper clamping force.

A B7 all thread bottom section, stock length to suit ductile embedment criteria, is joined to the R-193 top section by a heat treated, 4140, class 2 fit, extra long coupling nut.

Custom design canisters incorporating the R-193 Anchor Bolt™ and all of its benefits are available. These canisters allow lateral and angular misalignment corrections.

Material Specifications

• All bolts machined from high strength chromium molybdenum alloy steel (AISI 4140 typically) with a minimum tensile strength of 125,000 PSI and rolled threads – all of the above per ASTM A193
• 2h heavy hex nut per ASTM 194

Engineering Specifications

• 8 TPI per ASTM A193
• Top section design length allows for 12 times the bolt diameter in free stretch
• Top section heat treated per ASTM A193, GR B-7
• Frangible section shaped per ASTM A370
• Shot peened per mil spec S-13165-B amendment 2
• Self-aligning double spherical washer made from 4140, through hardened to the requirements of ASTM F-436
• Plastic grout sleeve provided
• Class 2B fit extra long coupling heat treated to ROCKWELL C 24-29
• Coupling thread engagement (top and bottom sections) is 2” minimum for 1.25” to 2” diameter bolts – top section will have additional ± .5” engagement to allow for top section elevation adjustment
• 2h heavy hex coupling lock nut
• Coupling and coupling lock nut will have a thread adhesive applied before tightening
• Bottom section is B7 all thread – design length per ACI 439
• Bottom plate, if used, secured with a 2h nut threads below 2h nut are deformed or spot welded to prevent loosening

Optional

• Extra 2h nut provided that can be welded to rebar cage to secure bolt location/elevation

Quality Control Requirements

• All bolts checked with a calibrated ring gage
• All couplings checked with a calibrated go/no go gages for a class 2B fit
• All threads visually inspected for delamination from rolling process
• All bolts and couplings will have a stamped serial number – traceable back to original mill run of the bar stock. mtr’s kept for all bolts.
• All threads inspected for burrs or deformations to ensure that nuts are free turning – all burrs removed before shot peening operation
• All bolts will be protected with a polynet webbing to protect the threads during shipping
• All bolts will be protected from corrosion with an anti-rust lubricant that meets ASTM D-1735-62 and ASTM B-117-73
• Bottom nut or plate, if used, lock nut thread deformation or spot weld checked to ensure the nut cannot loosen
• All grease will be removed from the bolt and coupling in the area where the tread adhesive is to be applied

Load Monitor Specifications

• ± 5% repeatable accuracy
• Withstand 1500 hrs of continuous salt spray
• The load setting for all bolts is checked by a hydraulic tensioner to ensure the load setting is accurate
• Load indicator does not require visual inspection to determine anchor bolt torque
• Gage pin made from 12.9 carbon steel to BS 3692
• Withstand operating temperatures of 350°F or 180°C
• Special order high temperatures (up to 1100°F or 600°C) applications
• Anhydrous high melt calcium base grease to MILG- 10924C and NATO G403 as corrosion protection

R-193 High Strength Anchor Bolts PDF

Clamping Force PDF

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