Gyokucho TPE Seiun Saku Ryoba Saw

£31.10
SKU:
300660
UPC:
4903524310142
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Seiun Saku are the standard ryoba for carpentry and joinery work, the angle between the centreline and the toothline is carefully calculated to give a rapid yet smooth cut and the heat treatment is optimised for springiness, i.e. the degree to which the blade can be distorted and still return to its original shape.

Blade Length 210mm 240mm 240mm
fine tooth
270mm 300mm
Model No. 660 661 662 663 664
Blade Depth 70 - 87mm 77 - 97mm 77 - 97mm 90 - 115mm 95 - 120mm
Overall Length 530mm 560mm 560mm 645mm 680mm
Blade Thickness 0.45mm 0.5mm 0.45mm 0.6mm 0.7mm
Pitch XC 1.5mm
16.9tpi
1.7mm
14.9tpi
1.3mm
19.5tpi
2.5mm
10.2tpi
3mm
8.7tpi
Pitch Rip 3.7-2.5mm
6.9-10.2tpi
3.8-2.4mm
6.7-10.6tpi
3.8-2.4mm
6.7-10.6tpi
5.6-3.8mm
4.5-6.7tpi
5.6-3.5mm
4.5-7.3tpi
Set per Side 0.125mmm 0.125mm 0.125mm 0.125mm 0.125mm
Max Depth
Replacement Blade S605 S610 S611 S615 S616
Accepts Blades S610
S611
S649
S650
S651
S605
S611
S649
S650
S651
S605
S610
S649
S650
S651
S616
S655
S615
S655

 

Gyokucho razorsaws, the original replaceable blade Japanese saws, have long been renowned for their cutting efficiency and excellent durability. The latest generation of Gyokucho saws have blue handles made from TPE (thermoplastic elastomer) a remarkable material that is simultaneously hard and resilient yet feels velvety to the touch and affords a superb grip. 

The blades of Gyokucho saws are treated using a process called electroless nickel plating, this has three functions. Firstly, it protects the blade against corrosion, secondly it provides a nice shiny mirror surface so you can gauge your cutting angles, and thirdly its low friction properties inhibit resins and sap from building up on the blade - anything that does manage to get stuck to them can easily be washed off with warm soapy water.

The teeth are differentially impulse hardened, one by one, bringing the outer surfaces to RC68 or more whilst still leaving the 'root' of the tooth soft and therefore much less prone to fracture - not unlike tiny Japanese sword blades. They are equally happy working in softwoods or temperate hard woods and can, with care and a light touch, be used on exotic timbers too.

Ryoba are double edged saws (Ryo = Two, Ba = Edge). They have different tooth patterns on either side of the blade, usually one for ripping and the other for crosscutting.

Here's an interesting video by David Walton, YouTube's Unplugged Woodworker, on Ryoba Saw basics using a Gyokucho TPE saw.