New Stanley Block Plane - No. 9 1/2 / 5-12-020

stanley 9 1/2 / 5-12-020 block plane
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Stanley 5-12-020 Plane Review By: I.Ball

Category: Block Planes

Manufacturer: Stanley

Plane Type: Block

Model No: 9 1/2 / 5-12-020


The new Stanley 9 1/2 / 5-12-020 Block Plane review covers the latest adjustable Stanley 5-12-020 Block Plane which Stanley also refers to and advertises as the new Stanley 9 1/2 Block Plane.

If you are looking for info / review on the old versions of this plane, see the Old Stanley 9 1/2 Plane review, old Stanley 9 1/2A Plane review. and the old Stanley 9 1/2G / G12-020 Plane review.

The Stanley 9 1/2 plane has been used by woodworkers for over 140 years. In this time the design stayed the same for many decades.

stanley 9 1/2 / 5-12-020 block plane

140+ years of feedback from woodworkers gives great confidence the tool design does the job.

The 9 1/2 plane has seen a modern design update with the core of the features / functionality staying the same. With this modern update Stanley updated the product number to 5-12-020.

The Stanley 9 1/2 is a fully adjustable plane with an adjustable mouth and adjustable cutter mechanism.

The blade lays on top of the cutter adjuster which offers lateral blade adjustments and depth of cut adjustments, this allows quick and easy blade positioning.

The mouth can be adjusted offering a range from a fine mouth to a deep mouth. The mouth is adjusted by loosening the front knob and rotating the arm under the front knob which in turn moves the front sole forwards and backwards giving the mouth size, finally tighten the front knob to secure and lock in the mouth size.

new stanley block plane 9 1/2 / 5-12-020

Spare / replacement Stanley 5-12-020 / 9 1/2 plane blades / cutters are readily available and no doubt will be for many years to come.

This Stanley block plane sits comfortably in the hand with its compact size and its rounded and curved parts.

The Stanley 9 1/2 is supplied with a block plane sock / pouch (at the time of writing this). The plane sock offers some protection to the plane including helping to reduce risk of tarnish / rust.

The RRP is a well priced, good value for money plane making it the go to plane for many woodworkers, carpenters, hobbyists and DIY'ers.

If you are looking for a higher-end block plane and you can afford the steeper price, you may wish to consider one of the Veritas block planes.

Cautions / Notes

* Important: please refer to the 'disclaimer' at the foot of this review.
* Wearing safety clothing and eye protection is usually a good idea to help protect against injury.

- The blade(s)/cutter(s) is very sharp, take suitable precautions when using/handling/storing the plane/cutter(s) to prevent injury.

- Failure to loosen parts when making adjustments to the plane can result in damage to the plane such as cross-threading screw threads. Never force a part to move.

- Overtightening parts can cause damage to the plane and the plane threads.

Plane Construction

new stanley block plane 9 1/2

fine grey cast iron

Lever cap:
fine grey cast iron

Blade adjuster knob:


Plane finish:

Construction Origin:

What Is The Difference Between a New Stanley 220 Plane and a New Stanley 9 1/2 Plane?

The new Stanley 220 block plane is similar to the new Stanley 9 1/2 block plane with the core differences being the Stanley 9 1/2 has an ajustable mouth whereas the Stanley 220 has a fixed mouth.

There is a difference in the front knobs with the 220 having a fixed moulded front knob and the 9 1/2 / G12-020 having a metal front knob.

The final difference is the Stanley 9 1/2 has side wall depressions, originally called the "Hand-Y" feature, whereas the 220 has flat sides.

Manufactured Dates

<1999 - Today

For info on older 9 1/2 block plane versions see the Old Stanley 9 1/2 Plane review.

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- Stanley Tools Inc.


(i) Please always refer to and follow the manufacturer's instructions / guidelines / safety notices / cautions and similar notices as the manufacturer's instructions may contain important information on safety, personal safety and the good health of your tool, something to which this review's scope does not guarantee to extend to.
(ii) This review may give warning(s) / advisory notes / cautions / guidelines given in good faith however any such information should not be solely relied upon and should not be seen as the exhaustive list of warnings / advisory notes / cautions / guidelines. Refer to disclaimer note (i) for information on safety, as well as the good health of your tool. In addition refer to good safety practices for the safety of you and others. Refer to good practices for the good health of your tool and property.
(iii) The details here are given in good faith, there is scope for error and shouldn't be fully relied upon, please be aware the details may also become out of date due to manufacturer changes to the product, please confirm any details for yourself by performing additional research from reliable sources.

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