Spyderco UK Penknife Back Spring Design

Spring Re-Design | Constant Quality Improvement

Spyderco Knives UK Penknife Black FRN Handle C94PBK Knife Flat Grind Blade Spyderco Constant Quality Improvement - 2012 UKPK Blade Spring 9

Originally released in 2004, the Spyderco UK Penknife, C94 has undergone many changes. The current version, named the Spyderco UK Penknife Lightweight was launched in 2011. The blade is 2.5 mm thick, flat grind, American CTS-BD1 steel, with black fibreglass reinforced, co-polymer, (FRCP) injection molded handle scales. The half-length, back spring of the UKPK Lightweight has been greatly improved compared to earlier versions of the UKPK Lightweight.

Spyderco Constant Quality Improvement - 2012 UKPK Blade Spring 1 Spyderco Constant Quality Improvement - 2012 UKPK Blade Spring 2

The newly designed, 2-pronged spring, which resembles a tuning fork, now provides a much higher resistance to closing. This so called 'notch joint' type of non locking, folding knife is harder to close than a traditional slipjoint folding knife. The Spyderco index finger 'choil' or groove offers additional security against unintentional closing of the blade. The knife is meant to be gripped with the index finger in the choil between the cutting edge and the handle.

Spyderco Constant Quality Improvement - 2012 UKPK Blade Spring 3 Spyderco Constant Quality Improvement - 2012 UKPK Blade Spring 4

The back spring is held in place by a centre-stop inside the FRCP handle, this makes it easier to remove the pocket clip from the end of the handle as the spring is no longer secured there.

Spyderco Constant Quality Improvement - 2012 UKPK Blade Spring 5 Spyderco Constant Quality Improvement - 2012 UKPK Blade Spring 6

The beauty of the 2 pronged spring design, means there is no movement of the spring outside of the back edge of the handle scales, when the blade is opened and closed. Highly accurate tooling during manufacture makes sure there is only minimal movement within the spring, and there are no gaps to allow unwanted entry of dust and dirt into the mechanism.

Spyderco Constant Quality Improvement - 2012 UKPK Blade Spring 7 Spyderco Constant Quality Improvement - 2012 UKPK Blade Spring 8

A halfway closing stop in the centre rotational point of the blade tang is the safety feature which prevents the blade closing on to the fingers. The Spyderco trademark thumb hole, as always, allows convenient one-handed opening.

Spyderco UK Penknife 2018 Versions