CDI 10ST-I – Short Tube Preset Torque Wrench

The CDI 10ST-I is a J-shank preset interchangeable-head torque wrench covering 84–300 in-lb (9.5–33.9 Nm) in a short-tube design that reduces the operator force required to reach the preset torque value. At 11 inches and 0.90 lb it shares the same physical footprint as the 10T-I, but the extended front tube section increases the mechanical advantage at the point of application — the same preset torque is reached with less physical effort per cycle.

Why reduced operator force matters on a production line

In a production environment where the same operator applies the same preset torque to the same fastener location hundreds of times per shift, the per-cycle force required directly affects fatigue accumulation and end-of-shift consistency. A short-tube design that reduces the input force needed to achieve each click means the operator is physically less taxed through the production run — and a less fatigued operator at cycle 500 produces the same torque result as at cycle 1. For overhaul shops processing batches of identical engines or airframe subassemblies, that consistency across the full batch is the product.

How the 10ST-I range differs from the 10T-I

The 10T-I covers 30–250 in-lb and reaches lighter hardware at its lower end — connector backshell hardware, instrumentation fasteners, and light accessory mounting in the 30–80 in-lb band. The 10ST-I covers 84–300 in-lb and is calibrated for the upper accessory and structural band — magneto mounting, carburetor and fuel injection attachment, vacuum pump and alternator bolts, and heavier accessory case hardware in the 100–300 in-lb range. If the production spec falls below 84 in-lb, the 10T-I is the correct tool. If the spec falls in the 84–250 in-lb overlap and reducing operator fatigue on a high-cycle line is a priority, the 10ST-I's short-tube geometry addresses it.

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

The 10ST-I ships unset — the operator sets the torque value within 84–300 in-lb. No calibration certificate is included. For environments requiring NIST-traceable calibration documentation at a specific preset value, order the 10ST-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 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 10ST-I does not ship with a calibration certificate — for QCM or quality program traceability requirements, select the 10ST-I-SET.

Built for high-cycle upper-accessory production work

• 84–300 in-lb (9.5–33.9 Nm) — calibrated for the upper engine accessory and airframe structural production band
• Short-tube design reduces operator input force per cycle — a genuine fatigue-reduction feature on high-cycle production lines
• 11.00" overall length and 0.90 lb — same compact footprint as the 10T-I, different internal geometry
• J-shank (27/64") accepts open-end, box-end, flare nut, and ratchet drive heads — 100+ configurations
• Tamper-proof single-setting mechanism prevents adjustment between production cycles
• Audible click plus tactile impulse confirms torque on each fastener without scale verification
• Cushion grip handle for repetitive use across a full production or overhaul shift
• Made in the USA by CDI Torque Products, a Snap-on Industrial Brands company

Where production and overhaul shops use the 10ST-I

• Magneto mounting hardware on Continental and Lycoming accessories — identical torque across every engine in an overhaul batch
• Carburetor and fuel injection attachment hardware on production engine assemblies
• Vacuum pump and alternator mounting bolts on engine accessory production and overhaul lines
• Engine accessory case cover hardware and structural attach points in the 100–300 in-lb band
• Airframe subassembly production where the same bracket, panel, or structural fastener is repeated across identical assemblies
• Any high-cycle repetitive operation in the 84–300 in-lb band where reduced operator force per cycle improves end-of-shift consistency

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 line runs the user-set 10ST-I or requires the factory-certified 10ST-I-SET, both come from the same aviation-specialist source that understands production torque documentation requirements across the entire engine and airframe manufacturing spectrum.