Name: HOLE SAW BI-METAL 21MM
Brand: TORK CRAFT
SKU: TC12006
Price: 70.61 ZAR
Availability: InStock

HOLE SAW BI-METAL 21MM

Stock: In Stock
Brand: TORK CRAFT
Model: TC12006
Weight: 0.02kg
Dimensions: 64.00mm x 94.00mm x 94.00mm
SKU: TC12006
UPC: 6009675080120

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Bi-metal hole saw

Hole saw diameter: ø21mm
Use mandrel: TC17002

Application:

The Bi-metal hole saw's fast cutting power lies behind its HSS (hi-speed steel) manufactured teeth.

The teeth have been set to a variable pitch to improve harmonic vibration and to have a better chip clearance.

The hole saw can be used to cut into:

Aluminium
Copper
Mild steel (sheet metal)
Stainless steel (sheet metal)
Zinc
Wood
Drywall (plaster board)
PVC

The Bi-metal hole saws are primarily used by electricians, plumbers, machinists and carpenters.

Features:

Low vibration and even cut due to the variable pitched teeth.
Strong electron beam welded cup design with a tough alloy body for added durability.
Knock out hole for plug removal.
Depth of cut: 38mm
Long life - when used properly within the correct rpm and using a lubricant when cutting into metals.

Lubricant tip:
Use paraffin or beeswax when cutting into aluminium. Use CT-90 or a general-purpose lubricating oil when cutting into steel.

Bi-metal hole saw

Using a hole saw:

To use a hole saw, you need the following accessories:

A portable drill or stationary drill with a 3 jaw chuck.
The correct mandrel and pilot drill for the material being drilled into.
The necessary safety equipment. Safety goggles, gloves and hearing protection.

IMPORTANT:
For the best results and for safety reasons, use the recommended rotation speed for the material being drilled into.

For longer hole saw life, use the following instructions:

Use the correct mandrel for the diameter hole saw being used.
Use pin-type mandrels for hole saws larger than Ø32mm. When mounting the mandrel, lift the pins up and then screw the mandrel down into the hole saw as far as it will go. It is important that the pins holes are securely located in the hole saw.
Use the correct rotation speed. If the speed is too high or too low will have an effect on the cutting edge on the hole saw and decrease the life expectancy.
Clear away wood chips or iron filings frequently to prevent the hole saw from overheating.
Always apply the necessary pressure for the intended use. Too much pressure can destroy the teeth when cutting in metals.
Keep the drill going straight to avoid binding the hole saw.

TIP:
When using a hole saw for wood, clamp an off-cut backing board on the back to prevent tear out when the hole saw exits the material. The backing board also prevents materials from flexing.

Rotation speed of hole saws (rpm):

DIA.	MILD STEEL	S. Steel	CAST IRON	BRASS	ALU.	WOOD
Ø 14mm	580	300	400	790	900	3000
Ø 16mm	550	275	365	730	825	3000
Ø 17mm	500	250	330	665	750	3000
Ø 19mm	460	230	300	600	690	3000
Ø 20mm	435	240	290	580	660	3000
Ø 21mm	425	210	280	560	635	3000
Ø 22mm	390	195	260	520	585	3000
Ø 24mm	370	185	245	495	555	3000
Ø 25mm	350	175	235	470	525	2700
Ø 27mm	325	160	215	435	480	2700
Ø 29mm	300	150	200	400	450	2700
Ø 30mm	285	145	190	380	425	2400
Ø 32mm	275	140	180	360	410	2400
Ø 33mm	260	135	175	345	390	2400
Ø 35mm	250	125	165	330	375	2400
Ø 37mm	240	120	160	315	360	2400
Ø 38mm	230	115	150	300	345	2400
Ø 40mm	220	110	145	290	330	2100
Ø 41mm	210	105	140	280	315	2100
Ø 43mm	205	100	135	270	305	2100
Ø 44mm	195	95	130	260	295	2100
Ø 46mm	190	95	125	250	285	2100
Ø 48mm	180	90	120	240	270	2100
Ø 51mm	170	85	115	230	255	2000
Ø 52mm	165	80	110	220	245	2000
Ø 54mm	160	80	105	210	240	2000
Ø 57mm	150	75	100	200	225	2000
Ø 59mm	145	75	100	195	225	2000
Ø 60mm	140	70	95	190	220	2000
Ø 64mm	135	65	90	180	205	1800
Ø 65mm	130	65	85	175	200	1800
Ø 67mm	130	65	85	170	195	1800
Ø 68mm	130	65	85	170	195	1800
Ø 70mm	125	60	80	160	185	1800
Ø 73mm	120	60	80	160	180	1800
Ø 76mm	115	55	75	150	170	1500
Ø 79mm	110	55	70	140	165	1500
Ø 83mm	105	50	70	140	155	1500
Ø 86mm	100	50	65	130	150	1200
Ø 89mm	95	45	65	130	145	1200
Ø 92mm	95	45	60	120	140	1200
Ø 95mm	90	45	60	120	135	1200
Ø 98mm	90	45	60	120	135	1200
Ø 102mm	85	40	55	110	130	1000
Ø 105mm	80	40	55	110	120	1000
Ø 108mm	80	40	55	110	120	900
Ø 111mm	80	40	50	100	120	900
Ø 114mm	75	35	50	100	105	900
Ø 121mm	70	35	45	95	95	900
Ø 127mm	65	30	45	90	90	800
Ø 133mm	65	30	45	90	90	800
Ø 140mm	60	25	40	85	85	800
Ø 146mm	60	25	40	85	85	800
Ø 152mm	55	25	35	75	75	800

consider safety for your health and the people around you
General safety suggestions: It is advisable to always have the following items nearby and in a good condition Eye protection – clean and scratch free Hearing protection – quality earmuffs Dust masks – discard old and dirty masks Gloves – for easy handling of material and hand protection

Wear Gloves	Eye Protection	Hearing Protection	Dust Mask

IMPORTANT:
Tilting the drill or hitting a nail with the hole saw while drilling could cause the hole saw to bind. The powerful torque could strain your wrist.

Bi-metal hole saw

Tork Craft Bi-Metal Hole Saws