T/NSSAA 001-2023 Pencil sharpener

Scope

Main Technical Content: 3 Terms and Definitions The terms and definitions defined in QB/T 1337 "Sharpener" apply to this document. 3.1 Knife Seat Hole Diameter The diameter of the conical hole at the end of the knife seat on the sharpener shell used for sharpening pencils. 3.2 Pencil Tip Conicity (Pencil Shaping Cutting Angle) The angle of the cone-shaped pencil tip formed after sharpening. 4 Classification 4.1 Products are classified into two grades: qualified and superior. 5 Requirements 5.1 Sharpening Capacity For qualified sharpeners, the number of wooden pencils sharpened should be no less than 15; for superior sharpeners, the number should be no less than 20. 5.2 Pencil Tip Conicity The angle of the cone-shaped pencil tip formed after sharpening should be between 13 and 30 degrees. 5.3 Corrosion Resistance For sharpener blades with metal coatings, the rust percentage after testing should be less than 15%. 5.4 Knife Seat Hole Diameter The hole should allow pencils to be successfully sharpened. It should generally be greater than 8mm. 5.5 Appearance The knife seat or shell of the sharpener should be smooth, flat, non-deformed, and free from cracks or obvious defects. The blade should have no rust spots, no obvious pitting, or metal grinding marks. 5.6 Safety Performance 5.6.1 If functional sharp edges or pointed tips are necessary for the sharpener's function, warning labels should be provided, and no other non-functional sharp edges or pointed tips should exist. 5.6.2 Accessible metal edges, including holes and grooves, should not contain dangerous burrs or slanted thin edges, folded edges, rolled edges, or curved edges. They should be protected by permanent protective parts or coatings. 5.6.3 The exposed ends of accessible screws should not have exposed sharp edges or burrs, or their ends should be covered by smooth screw caps to prevent access to sharp edges and burrs. 5.6.4 The assembly of the blade on the knif

Development Information

Related Standards