Purchase record, Warranty, Angle settings – Triton BRA 100 User Manual

Page 5

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Date of Purchase: ___ / ___ / ____
Model: BRA100
Serial Number: __________________

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6. Compound Mitres
Each piece making up a compound mitre frame

needs to be cut twice. The first cut is done on

the compact table against the protractor, and the

second is done on the bevel ripping guide.
Choose the shape you wish to build, (try the

triangle or square first - they’re the easiest).

Then decide how steep a bevel angle you want,

shown as b° on the chart overleaf.
(Shallow angles and narrow boards result

in picture frames or trays, larger angles and

wideboards result in planter boxes).
Accurate compound mitre joints require carefully

estimated settings to fractions of a degree on

the protractor and the bevel ripping guide, so

take your time and practice all cuts on scrap

material.
Step 1: Crosscut your workpieces to exactly the

required lengths, preferably using a sub-fence

and stop-block on the protractor. Then cut the

opposing MITRE ANGLES (M°) at each end of

each workpiece against the protractor on the

Compact table, using the settings shown under

‘PROTRACTOR SETTINGS’. Use the protractor in

the ‘trailing mode’ or ‘leadingmode’, whichever

gives you better support closer to the blade.
Note that the settings given are the complement

(to 90°) of the MITRE ANGLES. If your

workpieces are flat on both faces (ie. not

moulded or contoured), simply turn them over

for the second cuts rather than resetting the

protractor from +X° to -X°.
Step 2: Fit the bevel ripping guide and set it

to the BEVEL GUIDE ANGLE shown for your

selected shape and bevel angle. Re-cut all of

your mitres on the bevel ripping guide using the

protractor positions and settings shown in the

chart.
You cannot short-cut this procedure by turning

the wood over, because the cuts won't form an

inclusive angle. Cut one end of each workpiece

at one protractor setting, and then reset and re-

position the protractor for cutting the other ends.
Other shapes: Mitre and bevel angles for

shapes not shown can be determined by

using the following equations and a scientific

calculator.

Equations
M°

= tan

-1

( )

B° = cos

-1

(

)

M° = True mitre angle to be cut
B° = True bevel angle (BEVEL GUIDE ANGLE)
m° = Corner half angle
b° = Side angle to be horizontal

Protractor Settings
Used for cutting MITRE ANGLES (M°) and for

recutting into compound mitres

Operating

Hand-Held Operation

Triton Precision Power Tools guarantees to the
purchaser of this product that if any part proves to
be defective due to faulty materials or workmanship
within 12 MONTHS from the date of original
purchase, Triton will repair, or at its discretion
replace, the faulty part free of charge.

This guarantee does not apply to commercial use
nor does it extend to normal wear and tear or
damage as a result of accident, abuse or misuse.

* Register online within 30 days.

Terms & conditions apply.

This does not affect your statutory rights

WARRANTY

20º

30º

45º

50º

31.6º

33.7º

38.2º

49.1º

17.2º

25.7º

37.8º

48.8º

22.5º

30º

45º

60º

47.3º

49.1º

54.7º

63.4º

15.7º

20.7º

30.0º

37.8º

75º

75.5º

43.1º

30º

45º

60º

75º

57.8º

62.8º

70.0º

79.4º

17.1º

24.6º

30.6º

34.6º

45º

60º

75º

67.8º

73.9º

81.5º

20.7º

25.7º

28.9º

45º

60º

75º

73.7º

78.3º

83.9º

15.7º

19.4º

21.7º

-58.4º

-58.3º

-50.8º

-40.9º

-42.7º

-40.9º

-35.3º

-28.8º

-14.5º

-32.2º

-27.2º

-20.0º

-10.6º

-22.2º

-16.1º

-8.5º

+58.4º

+58.3º

+50.8º

+40.9º

+42.7º

+40.9º

+35.3º

+28.8º

+14.5º

+32.2º

+27.2º

+20.0º

+10.6º

-16.3º

-11.7º

-6.1º

+22.2º

+16.1º

+8.5º

+16.3º

+11.7º

+6.1º

bº