Taper-Lok tapered-shank interference-fit bolts (NAS1724 / NAS1728) tooling, gauges and removal
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Tools, heads, adapters and gaugesCited tables
No manufacturer tool table is public: the Taper-Lok installation specification ("BPS148") and reference manual are cited in AFFDL-TR-75-93 by title only. Tool names come from that 1975 USAF-sponsored report.
Installation tools
Taper-Lok drill reamer (flush head)
Taper-Lok drill reamer for flush-head-type fastener holes
"The reamer shown in Figure A-2a is for the drilling of flush-head-type fastener holes in which both the hole drilling and countersinking are accomplished in one operation." Reamers "are categorized into nominal diameters, head types, material, and group size similar to that used for the fasteners."
AFFDL-TR-75-93 Interference-Fit-Fastener Investigation, p.39, Figure A-2a ↗
Taper-Lok drill reamer (protruding head)
Taper-Lok drill reamer for protruding-head-type fastener holes
"The other reamer (Figure A-2b) is used for drilling holes for the protruding head-type fastener. In both cases, the drill cutting lips are on the end of the tool and the reaming flutes on the side."
AFFDL-TR-75-93 Interference-Fit-Fastener Investigation, p.39, Figure A-2b ↗
Grip, hole and inspection gauges
TLG 5160
Taper-Lok fastener protrusion pin
Checks: "The Taper-Lok TLG 5160 fastener protrusion pin was used to determine the degree of interference and contact area between the bolt and hole." (a research report's procedure, not an installation spec)
AFFDL-TR-75-93 Interference-Fit-Fastener Investigation, p.47, Hole inspection ↗
TLG 5120
Countersink depth gage
Checks: "Flush-head type fastener holes were inspected for proper countersink depth with a TLG 5120 countersink depth gage."
AFFDL-TR-75-93 Interference-Fit-Fastener Investigation, p.47, Hole inspection ↗
Accessorys
Microstop drill cage
Microstop drill cage
"The microstop drill cage (shown in Figure A-1) was employed for drill reaming to accurately controlled depths."
AFFDL-TR-75-93 Interference-Fit-Fastener Investigation, p.37, Figure A-1 ↗
Tooling source notes
- FAA-H-8083-31B p.4-55: "New tapered shank bolt installation or rework of tapered shank bolt holes needs to be accomplished by trained personnel."Government document, not interview: FAA-H-8083-31B.
Removal (drill-out)None published
No published removal procedure found; follow the manufacturer's instructions. Manufacturer page ↗
Sources
Tool tables are the manufacturer's as published in the cited revision; confirm current tool PNs with the manufacturer before purchase. Not a certified process authority: install and remove per the OEM process specification.
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