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		Nailing and Screwing - Course: Making of wood joints. Instruction examples for practical vocational training (Institut für Berufliche Entwicklung, 29 p.)
			(introduction...)
			Preliminary Remarks
			Instruction Example 01.1. Nailing of a Lath Grid
			Instruction Example 01.2. Nailing of a Halved Frame Corner Joint
			Instruction Example 01.3. Nailing of a Tool Kit
			Instruction Example 01.4. Nailing of a Wall Panel
			Instruction Example 01.5. Screwing of a Carrying Handle on a Tool Kit
			Instruction Example 01.6. Screwing on of a Screw-on Brace

Instruction Example 01.6. Screwing on of a Screw-on Brace

In this instruction example, the fastening of a door hinge to a board leaf by means of countersunk-head wood screws and round-head bolts is practised.

Material

1 plank door leaf
2 screw-on braces with screw holes 6.4 mm dia. and a punched hole for each screw hole of 8.4 mm dia.
6 off round-headed wood screws dia. 6 x 50 mm
2 off round-head bolts with square neck M 8 x 60 mm with washers and nuts

Figure

Tools

screw driver 12 mm, wood drills 4; 6; 8 mm, screw wrench 13 mm

Auxiliary means

joiner's bench, support, pencil

Required previous knowledge

reading of the drawing, measuring and scribing, drilling

Sequence of operations

Comments

1. Prepare the workplace, make the working materials available

Check the completeness of the required tools and materials, put the door leaf onto the joiner's bench and support!

2. Put on the braces to be screwed on, align and mark the screw bores with a pencil

The screw-on braces are centrally aligned above the crosspieces which hold the board cover and are screwed on. The required projecting length of the idler is to be observed/Check the proper position of the screwed on braces with a large back square!

3. Remove the screw-on braces, bore the screw holes

Drill through the 1st hole after the idler with a drill 8 mm, further holes are pre-drilled with a drill 6 mm, 20 mm deep, then bore 20 mm deeper with a drill 4 mm!

4. Put on the screw-on brace, insert the round-head bolts and fasten them with washers and nuts, drive in the wood screws with the screw driver

Tighten the nuts with a screw wrench. The washer shall be pressed 1 mm into the wood. Firmly tighten the wood screws but do not overturn them!

5. Final check

The long braces fir tightly to the wood, all screws are tightened, not overturned and not sheared off, bores for the wood screws are not visible on the inside of the door!

Screwing on of a Screw-on Brace

Sequence of operations	Comments
1. Prepare the workplace, make the working materials available	Check the completeness of the required tools and materials, put the door leaf onto the joiner's bench and support!
2. Put on the braces to be screwed on, align and mark the screw bores with a pencil	The screw-on braces are centrally aligned above the crosspieces which hold the board cover and are screwed on. The required projecting length of the idler is to be observed/Check the proper position of the screwed on braces with a large back square!
3. Remove the screw-on braces, bore the screw holes	Drill through the 1st hole after the idler with a drill 8 mm, further holes are pre-drilled with a drill 6 mm, 20 mm deep, then bore 20 mm deeper with a drill 4 mm!
4. Put on the screw-on brace, insert the round-head bolts and fasten them with washers and nuts, drive in the wood screws with the screw driver	Tighten the nuts with a screw wrench. The washer shall be pressed 1 mm into the wood. Firmly tighten the wood screws but do not overturn them!
5. Final check	The long braces fir tightly to the wood, all screws are tightened, not overturned and not sheared off, bores for the wood screws are not visible on the inside of the door!