The UJK Parf Protractor is an aluminum protractor with high-precision laser engraving, designed for use with the UJK Parf MkII drilling system. It allows drilling 20mm holes at any angle between 0° and 90° in 0.5° increments, eliminating cumulative errors with slightly varied reference hole positions. Made in Great Britain, in Axminster (Devon). Distributed in Italy by Krollit, official UJK distributor since 2007.
- Hole diameter: 20 mm
- Angle: 0°–45° and 45°–90°
- Reading increment: 0.5°
- Material: Aluminum with high-precision laser engraving
- Compatibility: UJK Parf MkII (also compatible with MkI)
- Compatible accessories: 20mm bench dogs, guide rail clamps
- Origin: Great Britain (Axminster, Devon)
Who uses the Parf Protractor and for what purpose
The Parf Protractor is used by carpenters and woodworkers who already own the UJK Parf MkII system and need to make repeatable angled cuts at any angle, not just 45° and 90°. In Italy, it is particularly adopted by those who build cutting stations with guide saws for custom work with personalized angles, those who create regular polygons and frames with precise angled joints, and professionals who operate both in the workshop and on site with temporary multifunction workbenches. Combined with 20mm bench dogs and guide rail clamps, it allows replicating any cutting angle with the same precision as the Parf MkII on 90° drillings.
Krollit logistics and support
Shipping 3–5 business days from Krollit warehouse, Monteforte Irpino (AV). Technical assistance in Italian at +39 0825-1494022.
Who is the Parf Protractor for
| Profile |
Compatibility |
Reason |
| Carpenter with Parf MkII making angled cuts with a guide saw |
Suitable |
Extends the system to any angle 0°–90° in 0.5° increments, with the same cumulative error elimination logic as the Parf MkII |
| Those who build frames, polygons, or structures with repeatable angled joints |
Suitable |
Slightly varied reference hole positions ensure angle precision at every point of the grid |
| Those who do not own the Parf MkII drilling system |
Not suitable |
The Parf Protractor requires the Parf MkII as an operational base and does not function as a standalone tool |
Not suitable for: those who do not have the UJK Parf MkII (sold separately) and for applications on metal or materials other than MDF and HDF.
Technical specifications
| Hole diameter |
20 mm |
| Angle |
0°–45° and 45°–90° |
| Reading increment |
0.5° |
| Material |
Aluminum with high-precision laser engraving |
| Reference holes |
Slightly varied position to eliminate cumulative errors |
| Use on vertical scale |
Yes |
| System compatibility |
UJK Parf MkI and MkII |
| Compatible accessories |
20mm bench dogs, guide rail clamps |
| Country of manufacture |
Great Britain (Axminster, Devon) |
Comparison with the Parf Plus system
| Parameter |
Parf Protractor (only) |
Parf Plus |
When to choose the Plus |
| Content |
Protractor only |
MkII drilling system + protractor |
Those who do not yet own the MkII system |
| Angles |
0°–90° in 0.5° |
0°–90° in 0.5° |
Identical function |
| 90° drilling |
Only with separate MkII |
Included in the kit |
Those starting from scratch |
| Use |
Expansion for those who already have the MkII |
Complete standalone kit |
First purchase of the system |
Frequently Asked Questions
Is the Parf Protractor compatible with the Parf MkI drilling system as well as the MkII?
Yes. The manufacturer UJK explicitly states compatibility with both Parf MkI and MkII rulers. Owners of the original version of the system do not need to upgrade it to use the protractor.
The difference between MkI and MkII primarily concerns the durability of the guide holes over time: the MkII introduces a porous bronze bushing that prevents wear of the holes in the rulers. The Parf Protractor works with both versions because it relies on the same 20mm holes already produced in the workbench.
What angles can be produced and with what precision?
The Parf Protractor covers the ranges 0°–45° and 45°–90° with reading increments of 0.5°. The reference holes are positioned with intentional slight variation to ensure maximum angular precision at every point and eliminate cumulative errors.
In practice, each pair of bench dogs placed in the holes produced with the protractor creates a repeatable angular reference, usable with a guide saw to obtain consistent angled cuts on multiple pieces. The elimination of cumulative errors is the same principle as the Parf MkII, applied here to angles.
Is the Parf MkII drilling system necessary, or can the protractor be used alone?
The Parf Protractor requires the UJK Parf MkII, sold separately. It does not function as a standalone tool: it is used after the workbench has already been drilled with the MkII system.
Those who wish to purchase both components in a single kit can consider the Parf Plus, which includes the complete MkII drilling system and the protractor. Those who already own the MkII only purchase the Parf Protractor as an expansion.
How is the Parf Protractor used with bench dogs and the guide rail?
The protractor is placed on the drilled surface and indicates the position of the 20mm holes at the desired angle. Two bench dogs inserted into those holes create a physical reference against which the guide rail can be placed for angled cutting with a guide saw.
The method is the same as the Parf MkII for 90° and 45° cuts, extended to any angle between 0° and 90°. The protractor can also be used on the vertical scale of the system, further expanding the available work configurations.
Is the Parf Protractor compatible with bench dogs from manufacturers other than UJK?
The protractor produces 20mm holes, which is the industry standard for multifunction workbench systems. It is compatible with any 20mm bench dog, including solutions from other manufacturers that adhere to this standard diameter.
UJK explicitly states compatibility with a wide range of 20mm accessories and guide rail clamps. For applications requiring chamfered pins, it is advisable to check the specific tolerance of the pin used relative to the produced hole.
