Coba-Tech 4-6 TPI Standard Pitch Holesaws

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Prices from £8.95 £7.46
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Coba-Tech 4-6 TPI Holesaws (price is for 1 saw only)

German made Coba-Tech™ 4-6tpi (teeth per inch) Hole Saw.

Coba-Tech™ Bi-Metal Hole Saws are constructed of hardened, heat and abrasion resisting high speed steel teeth with a tough alloy body and cap. This gives them excellent strength, durability and shatter resistance. They will cut mild steel, aluminium, stainless, 4130 and T45. 

These 4-6tpi (teeth per inch) are perfect for heavier wall 2.0mm upwards. If your material is thinner choose the fine tooth 8/12tpi versions.

Remember to keep the speed slow (300rpm which is appox. half trigger on the slow setting of a battery drill) and use a thick cutting lubricant such as Rocol RTD or a tapping oil / paste. DO NOT USE WD40 as it will encourage rub and does not enhance cutting. These holesaws will fit all standard type Starrett, Morse etc Arbors. Holesaws up to 32mm fit straight on to the tube notcher arbor and 33mm upwards use the thread adaptors. All our Tube Notchers come with screw on thread adaptors for these larger sizes.

If you are using for cutting sheet in conjunction with a standard drill arbor with a pin drive, we recommend that you pull the collar back and screw all the way to the stop. Pin drives rattle and serve no purpose other than easy of removal. Also, take out the drill and fit the a piece of 6mm solid bar in place. The drill will vibrate and open up the hole which makes a mess of the process. Drill and 6mm piot hole first, then swap to the holesaw fitted with the solid pin.

Another good tip for using on thick sheet is to drill and exhaust hole just inboard of the hole. This lets the material expel down instead of clogging up the holesaw. This works on wood too using our courser toothed 4/6 tpi saws.

For thin sheet work we recommed Q-Max or Alfra hole punches for a perfect hole every time.

Product Code CT
Teeth Per Inch 4-6
Varipitch or Fixed Pitch Vari





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Manufacturer Coba-Tech

Delivery & Returns

Items under 30kg will be shipped by either 24hr courier or 1st class Royal Mail depending on item and weight and size.
All orders will be packaged and despatched same or next day. Orders made later in the day will most likely be sent out the following day.
We use a Next Day Delivery service however this service is subject to stock, courier availability and courier area. A signature is required for courier deliveries so please arrange for someone to be in at delivery address.   

Delivery prices are calculated by total order weight & size and are as follows:


UK Mainland

Highlands & Islands










45kg +



Buying from outside GB Mainland.

We are happy to deliver worldwide upon request. Because of the many variables involved our website cannot calculate global shipping or deduct UK Tax, please call on +44 1509 812171 or email and we will work out the best price for you.

Heavy Goods Items/ Pallets

If you are ordering to Mainland UK or Highlands and Islands, once added to your basket, our shipping calculator will work out a shipping price depending on your delivery post code. Delivery can take up to 4 working days from point of order but is often sooner depending on location. We will call to let you know estimated delivery date, you may be required to help the driver move the product from the roadside to your desired location, please ensure somebody is in to receive the goods as there is a redelivery charge of £30 should you miss it.

We also ship heavy goods and pallets worldwide, however not through the website, please call on +44 1509 812171 or email

Returns Policy 
Stakesy’s Guarantee: 14 Day Money Back Guarantee 

1/ Items returned under the 7 working day cancellation period 
If for any reason you are unhappy with your purchase, you can return it to us in its original condition within 7 days of the date you received the item, unopened (with any seals and shrink-wrap intact) and we will refund the cost of the item and the cost of sending the item to you as follows: 
-where you are returning an item that was part of a larger order, we'll refund the per-item charge for delivery that you incurred -where you are returning an entire order, we'll refund all delivery charges that you incurred -we will refund only standard shipping charges for items delivered mainland UK (excluding Highlands & islands and orders over 25 kilos in weight)

2/ Items returned under 14-day returns guarantee 
Where you are withdrawing from your purchase between 7 and 14 days after delivery, and there has been no error on our part, we will refund only the cost of the item minus 10% handling charge. We will not refund the cost of delivery or other services provided to you in connection with your purchase.

3/ Any goods items over 60 kg that have incurred special freight charges are excluded and the buyer will be responsible for both arranging and the costs of the return delivery.

Refunds will be paid within thirty days of cancellation. 

Please post goods to be returned or exchanged to:

Stakesy’s Metalwork Machinery, Unit 12 Hayhill Industrial Estate, Loughborough, LE12 8LD.

It is crucial that you pack the goods to be returned the same way as we sent out. Please consider that a returned item that is damaged in return transit may well be un-refundable if we cannot re-sell. Please include a note of your requirements and original invoice number.