What is an AQL inspection for electric screwdrivers?

An AQL inspection is a statistical sampling inspection used to decide whether a batch of electric screwdrivers should be accepted or rejected before shipment.

Instead of checking every unit, the inspector selects a sample from the production lot and checks it against the agreed quality standard.

For electric screwdrivers, the inspection normally covers:

Appearance: scratches, color, logo, coating, and assembly quality

Function: forward/reverse, buttons, display, LED, and automatic stop

Torque: verify the required electric torque levels

Speed: check RPM and operating stability

Runout: check for excessive bit or shaft wobble

Battery: charging, voltage, runtime, and battery condition

Motor and gearbox: noise, vibration, heat, and smooth operation

Bit set: sizes, quantity, material, hardness, and tip accuracy

Accessories: cables, extension shafts, manuals, and other included parts

Packaging: retail box, case, barcode, labels, and outer carton

Defects are normally divided into:

Critical defects: safety hazards or serious compliance problems

Major defects: failures that affect normal product use

Minor defects: cosmetic or small workmanship issues that do not significantly affect function

For most electric screwdriver orders, a common starting point is General Inspection Level II, with Critical defects at zero tolerance, Major defects at AQL 2.5, and Minor defects at AQL 4.0. Premium or professional products may use stricter limits.

AQL inspection should not replace dedicated reliability testing. Important characteristics such as torque accuracy, battery performance, gearbox life, aging, and safety may require separate tests.

For ToolQeen electric screwdriver orders, AQL inspection can be combined with functional testing, torque verification, battery inspection, aging checks, and packaging inspection before shipment approval.