Difference between revisions of "Saw"
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+ | [http://groups.google.co.uk/group/uk.d-i-y/browse_frm/thread/8b05b60db8ac43d6/63e811bba3a3eefa#63e811bba3a3eefa Mitre saws] | ||
Revision as of 15:39, 27 May 2007
Hand saws
Hacksaw
- 2 types:
- Junior hacksaw, 6" blades
- Other one, 12" blades & other sizes
Mitre Saw
- Wood is clamped to the base
- Frame guides saw blade, keeping it at the chosen angle
- Small captive handsaw of some type cuts the timber
- Quite different to the electric mitre saw
Floorboard Saw
- Has additional teeth on the top side in an arc near the end
- Can saw into floorboards in situ
Toolbox Saw
- Shorter version of jack saw
- Fits in toolboxes
Jack Saw
- General purpose building saw
- Cuts timber, aerated concrete
Bow Saw
- Sawing tree branches
- The coarse peg teeth usually used cut on both strokes
Backsaw
Coping Saw
Crosscut Saw
Pullsaw
- Cut on the pull stroke
- Blade thinner than pushsaws
- Less effort for given progress than pushsaws
Fretsaw
Japanese Saw
Keyhole Saw
- Very narrow blade
Tenon Saw
Two-man saw
- aka pit saw
- Long slightly curved blade with a handle on each end
- Double the sawing power
- Very long stroke
Wire saw
- Flexible wire with a handle on each end
- Mostly used for veterinary uses (bones, horns)
- Exceptionally good access properties for difficult cuts
- Not expensive
- You wont get them from DIY suppliers
Power Saws
Jigsaw
- Low cutting speed
- Can cut curves
- Steer by rotating the saw, never push sideways
- Quality varies greatly
- Cheap & midrange jigsaws:
- Performance generally anything from patchy to dire
- Blades wander & bend badly
- Cost of ruined wood over the lifetime of a cheap or midrange jigsaw is likely to exceed the cost of a better saw
- Not possible to cut a straight line using a guide fence, as they need regular direction correction
- Good jigsaws:
- Constrain the blade with rollers
- Can cut straight lines
- Much less prone to blade bending, but not immune
- Various types of blade available:
- Coarse, medium, fine
- Blades for wood, metal, plastic, leather, paper products
- Flush cutting
- Knife
- Grit
- Varying pitch
Circular saw
- Fast cutting
- Cuts straight lines only
- Good general purpose DIY saw
- Riving knife prevents kickback
- Blades with high number of teeth can produce very smooth cuts
- Normally supplied with a guide fence
- Depth of cut and angle can be preset
- Max possible cutting depth is less with angled cuts
Mitre Saw etc
- aka compound mitre saw:
- Circular saw blade
- Cutting head swivels to cut at various angles
- Cutting head tilts to give cuts angled in 2 axes
- Plastic bases found on budget machines bend slightly under force, misaligning cuts.
- Pushing the saw can violently shatter the fence with some budget machines
Sliding Mitre saw
Mitre saw with cutting head that slides to cut wider timber
Flipsaw
- Mitre saw with a sawhead that flips over to give either a mitre saw or benchsaw
Chop Saw
- Look somewhat like mitre saws, but with no angle adjustments
- Cuts at precisely 90 degrees
- Workpiece clamp included
- Abrasive grit blade usually used
- Primarily used on metalwork
Scroll Saw
- Vibrating blade can be touched without injury
- Modern version of fretsaw
Spiral saw
- eg Rotozip
- Can plunge eolid materials then drill in any direction
- Can not withstand a lot of side force
- Die grinders can use 1/8" spiral saw blades, but such thin blades are not robust
- Spiral saws taking 1/8" blades may also take die grinder accessories - check speed ratings
Table saw
- Circular blade
- Fast feed rate
- Plastic or wood pushers are used to keep hands away from blade
Bandsaw
- Coarse, fine and omnidirectional blades available
Handheld Bandsaw
- A miniature hand held version of a band saw
- No idea about its strengths and weaknesses, anyone used one?
Tile saw
- Miniature table saw with diamond grit tile blade
- Water cooled blade
- Replacing the blade might allow it to do other jobs too
Reciprocating saw
- Powered version of jack saw or hacksaw
Chainsaw
- Relatively high risk saw
- Protective clothing is wise
- Basic training is wise
- Correct type of oil important
- Blade should not contact soil
Reviews
To Do
Plywood saw Rip saw Saw set