CDI 300T-I – X-Shank Preset Torque Wrench

The CDI 300T-I is an X-shank (0.735") preset interchangeable-head torque wrench covering 100–300 ft-lb (135.6–406.7 Nm) — the second-largest preset in the CDI T-I family and the one built for repetitive heavy-fastener work in turboprop and heavy piston aviation maintenance. At 27.75 inches long and 3.90 lb, the 27-inch handle provides the mechanical leverage to apply 250–300 ft-lb in a controlled single-click motion across a production run or overhaul batch.

The X-shank: the third interchangeable head format in the T-I family

The smaller T-I presets use J-shank (5T-I through 50T-I) and the 100T-I uses Y-shank. The 300T-I uses the X-shank — 0.735-inch nominal, CDI's interchangeable head format for the 100–300 ft-lb range. X-shank heads in open-end, box-end, and flare-nut configurations cover the fastener hex sizes found on propeller retention hardware, engine mount fasteners, landing gear structural attach, and heavy structural assembly fasteners at this torque level. X-shank heads are not compatible with J-shank or Y-shank formats — when ordering accessory heads for the 300T-I, specify X-shank dimension.

Where repetitive 100–300 ft-lb production work occurs in aviation

Propeller retention on PT6A-powered and similar turboprops frequently specs in the 200–300 ft-lb band for overhaul re-installation — where an overhaul facility reinstalling props on a batch of identical engines sets the 300T-I once and runs the entire batch with the same torque applied to each retention fastener. Engine mount attach bolts on heavier piston twins and light turboprops, main landing gear structural attach hardware on heavier singles and light twins, and heavy production subassembly fasteners all fall within this range. The preset format eliminates per-cycle adjustment, removes operator-setting variability, and keeps the production rhythm consistent from the first unit to the last in the batch.

User-set vs. factory-set: which to order

The 300T-I ships unset — the operator sets the torque value within 100–300 ft-lb. No calibration certificate is included. For environments requiring NIST-traceable calibration documentation at a specific preset value, order the 300T-I-SET, which CDI factory-presets to a value specified at order and ships with a NIST-traceable certificate. Specify the required value when ordering; allow 10 business days lead time.

Documentation and compliance

Meets ASME B107.14 and ISO 6789. Accuracy: ±4% CW of indicated value from 20–100% of full scale. The user-set 300T-I does not ship with a calibration certificate — for QCM or quality program traceability requirements on high-torque preset tools, select the 300T-I-SET.

Built for high-torque production and overhaul operations

• 100–300 ft-lb (135.6–406.7 Nm) — the range covering prop retention, engine mounts, and heavy landing gear structural hardware
• X-shank (0.735") interchangeable head system — designed for the head sizes required at 100–300 ft-lb
• 27.75" overall length provides the leverage for 250–300 ft-lb in a controlled single-click motion
• 3.90 lb cushion grip handle designed for repetitive use across a production run or overhaul batch
• Tamper-proof single-setting mechanism prevents adjustment between production cycles
• Audible click plus tactile impulse confirms torque on each fastener — critical on heavy structural hardware where over-torque has consequences
• Made in the USA by CDI Torque Products, a Snap-on Industrial Brands company

Where overhaul facilities and production shops use the 300T-I

• Propeller retention overhaul re-installation on PT6A-powered turboprop aircraft (200–300 ft-lb)
• Engine mount attach hardware on heavier piston twins and light turboprops in production environments
• Main landing gear structural attach and drag brace hardware on heavier light singles and light twins
• Heavy structural subassembly fasteners on production lines where the same torque is applied across identical units
• Any repetitive 100–300 ft-lb operation in a production or overhaul environment where consistency across a batch matters

Why source aviation tooling from Pilot John International

Pilot John International is an aviation-specialist distributor — not a general industrial catalog. We serve Part 145 repair stations, FBOs, MRO operations, and flight schools across the U.S. Whether your overhaul facility runs user-set 300T-I wrenches for production flexibility or requires factory-certified 300T-I-SET units for your quality program, both come from the same aviation-specialist source that understands high-torque preset tooling in certificated maintenance environments.