Woods Machine Safety # 2 Jointer

Purpose of the Jointer Joint the first rough Face of a board Joint the first rough Edge of a board Always joint the Cupped Face first Always joint the Crooked Edge first Outcomes

Makes the first Face and Edge flat Makes the first Face and Edge smooth Creates a Square corner between the first Face and first

Edge.

Guards are the most important part!

Outfeed Table

Infeed Table

Fence

Main Parts of the Jointer

Power Switch

Main Parts of the Jointer

8” Cutter Head 12” Margin of Safety

Main Parts of the Jointer

Fence Lock Fence Angle Lock NEVER TOUCH

Main Parts of the Jointer

Table Adjustment Lock Table Adjustment Lever

More parts that students should NEVER TOUCH

Personal Safety Preparation Always wear safety glasses when operating any

machine. Remove exposed keys or cell phones and any other

items that could get caught in the machine. Tape measures should also be removed. Always tuck the front half of your shirt while

operating the jointer.

Jointer Safety Tools

Combo Block

Push Stick

Push Block

Minimum Length- 12”

This size is directly related to the overall Margin of Safety.

Minimum Thickness- 1/2”

Maximum Depth of Cut- 1/8”

8” Cutter Head Cutter Head rotates clockwise when looking at it

from the front of the machine. This means that it is rotating towards the Infeed

Table.

Margin of Safety

Margin of Safety 12” total

Margin of Safety 6” on each side of the Cutter Head.

Cutter Head

Body Position People should never be directly behind or in front of

the Ends of a board. This includes the operator or anyone else in the shop. This applies to the Infeed and Outfeed table. This rule is in place to avoid possible injury to

anyone due to Kickback. It is the operators responsibility to make sure this

area is clear.

More Safety Considerations Always use a Metal Detector to check wood

for metal that could be inside and not visible. Make sure the Guard is operating properly by

pulling the Guard back slightly and allowing it to snap back towards the Fence.

Check the Guard only when the Cutter Head is not moving. Do not use and tell instructor immediately if the Guard is not working properly.

Reasons Why the Jointer is Dangerous The Cutter Head runs at a very high RPM. The Cutter Head blades are extremely sharp. The Cutter Head is exposed as the board is

exiting.

Fence Lock

Always make sure that the Fence Lock is locked by making sure it is just snug.

The 2 Adjustments an Operator Can Make

The student can loosen and tighten the Fence Lock in order to move the Fence into the correct position

The Infeed Table Height Adjustment can be moved by an operator. But, in our class the students will never adjust the Infeed Table height.

Only the instructor will ever adjust the Infeed Table.

Face Jointing- Fence Adjustment Move the Fence up far enough to cover extra

Cutter Head but wide enough to allow your board to pass through.

Always run your board through with the machine off (Dry Run) so that you know that your board will make it through.

This is important because your board may be wider at one end.

Always Joint the Cupped Face

CORRECT INCORRECT

Other Face Defect Issues Always joint the Bowed Face Always get instructor assistance when trying

to joint a Twisted board When these rules conflict each other, use the

most stable Face. Stable means that the board should not rock

or shift while cutting.

Face Jointing- Hand Placement Make sure all Push Blocks that your intend on using during

your cut are within easy reach. Your left hand (leading hand) will start with a Push Blocks in

contact with the top of the board a few inches back from the End.

When jointing the Face of a longer board you must use your right hand to feed the wood.

When your board reaches the end of the Infeed Table, you will pick up your Combo Block, hook it on the End of the board, and use it during the rest of the cut.

When picking up the second Push Stick, make sure that your left hand and Push Block are not moving and are not inside of the Margin of Safety.

Face Jointing Short Boards- Hand Placement The operator can start with a Combo Block in the

right hand, and hooked on the End of the board. If the board is long enough, you can use a Push

Block in the left hand to help guide the wood. If the board is very short (minimum 12”), only use

the Combo Block. You must use both hands on the combo block handle.

Always use a Combo Block and Push Block when moving your hands through the Margin of Safety.

Never have your hands in contact with the board while moving through the Margin of Safety.

Edge Jointing This is the 3rd step in the 6 step process Make sure to loosen the Fence Lock Handle and

bring the Fence as far forward as possible to reduce the amount of exposed Cutter Head.

Make sure that the Fence is relocked before continuing.

Then make a Dry Run while the machine is off.

Edge Jointing with Defects

Crown Down, wood not stable

INCORRECT

Flip 180 deg. to correct.

Crook Down, wood is stable

CORRECT

Hand Placement A Push Stick and Push Block need to be used

on any board that is not wider than 6 inches. If the board is wider than 6 inches, then the

operator can use their hands to feed the board through.

All parts of your hands must remain above the Fence even when jointing a wide board.

Body Placement Always stand in an upright position, never

lunge or lean. Use small shuffled steps and move with the

wood as you joint it. Always use consistent and smooth pressure. Keep your arms straight and your body close

to the machine. This allows you to use your body weight to help feed the board.

General Machine Rules Tuck in you shirt. Make sure machine reaches Full RPM, The

noise stops changing. Make sure that the Cutter Head stops moving

before leaving the machine. Clean up area: push tools, tools, and pieces of

wood.

Jointer Wrap-Up Jointing makes the surface flat. Jointing improves a Rough Sawn finish.

Jointer Wrap-Up Step 2 (Jointing the cupped face) and Step 3

(Jointing the crooked edge) create a Square corner along the length of the board.