3.5 mm HSS M35 Cobalt Step Drill Bit Spiral with Seven Steps at the Tip Length 70 mm Cylindrical Shank for Steel and Stainless Steel
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The step spiral drill bit with a diameter of 3.5 mm is a tool for drilling holes in metal. It is made from high-speed steel HSS M35 with cobalt, which is suitable for drilling iron, steel, and stainless steel. The tip of the drill bit is divided into seven small steps that smoothly transition to the full diameter. The spiral groove removes chips from the hole during drilling. The drill bit is useful in locksmith workshops, for machine maintenance, and for DIY projects at home.
The total length of the drill bit is 70 mm and the working part with the spiral measures 38 mm. The length of the working part determines how deep a hole can be drilled in one pass. The cylindrical shank allows for clamping in a standard chuck of a hand drill, cordless drill, or pillar drill. The diameter of the drill bit is stamped on the shank, making it easy to find in a toolbox. The stepped geometry of the tip is evident in the detailed product photographs.
This drill bit differs from standard spiral drill bits by having a tip with seven steps with gradually increasing diameters. The smallest step at the tip creates the first hole in the material, and the subsequent steps gradually widen it until the full diameter of 3.5 mm penetrates the metal. The hole is thus formed in several stages during one pass of the drill bit. The steps at the tip and the marks they leave on the wall of the hole are clearly visible in the detailed product photographs. The drill bit is designed for drilling into metal, particularly iron, structural steel, and stainless steel, and is suitable for both hand and pillar drills.
- Type – spiral drill bit with step tip
- Diameter – 3.5 mm
- Length of working part – 38 mm
- Total length – 70 mm
- Material – high-speed steel HSS M35 with cobalt content
- Tip – seven steps gradually transitioning to full diameter
- Shank – cylindrical
- Usage – drilling into iron, steel, and stainless steel
- Contents – 1 piece of 3.5 mm step spiral drill bit
For harder materials such as stainless steel, use cutting oil or coolant to reduce the temperature of the tip. Choose the speed according to the diameter of the drill bit and the type of metal, and guide the drill bit perpendicular to the surface without excessive pressure. After drilling, clean the drill bit of chips and store it separately to prevent damage to the tip.
The 3.5 mm step drill bit is a reliable helper for drilling into metal in the workshop and at home. High-speed steel with cobalt allows for drilling into stainless steel. The tip with seven steps gradually widens the hole to the full diameter. The cylindrical shank can be easily clamped into a standard drill. The package includes one drill bit with a diameter of 3.5 mm.
Delivery
Delivery to address€1.99
Estimated delivery: 23 November – 4 December
Shipped from China
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Delivery is only possible to addresses in Ireland.
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Returns and Exchanges
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Returns30 days to return without giving a reason
Withdrawal period30 days from receipt of the goods
Deadline to send the goods backWithin 14 days of withdrawing from the contract
Return shipping costsYou pay the postage for sending the goods back to Spain. With An Post (Standard Post), returning a parcel of up to 2 kg to Spain costs about €30. We charge no other fee.
RefundWithin 14 days of your notice of withdrawal, using the same payment method you used for the purchase. If you return the whole order, we will also refund the delivery cost.
Crediting of the amountUsually 2–10 working days, depending on the payment method
Product conditionYou may unpack the goods and try them as you would in a shop, and you can return them even without the original packaging
Returns addressQX-BOX AEMALL RETURN
Rotonda Rene Descartes, Parcela 101 – Nave 3
28070 Alcala de Henares, Madrid
SpainReturns centre in Spain operated by Qxbox, an e-commerce logistics provider and logistics partner of the sellers on our platform.
How do I return goods?
- Email us at info@lunzo.ie with your order number and the items you are returning.
- Pack the goods and send them by post to the returns address in Spain.
- Send us the proof of dispatch with the tracking number – this lets us refund you without waiting for the parcel to arrive.
Faulty goodsUp to 6 years to claim for faulty goods
Did the goods arrive damaged, do they not work, is something missing from the parcel or do they not match the description? We will sort it out.
Period for claiming a faultUp to six years from delivery of the goods
RefundWithout undue delay once the claim has been settled, using the same payment method you used for the purchase
How does it work?
- Email us at info@lunzo.ie with your order number and a description of the problem, and attach photographs or a video.
- We will assess it and suggest a solution. Photographs are usually enough – please do not send the goods back until you have received instructions from us.
- We will settle your claim within 30 days at the latest – with a new item, a price reduction or a refund.
If the goods need to be sent back, we will refund the postage for a valid claim (just provide the receipt).
ExchangesA different size, colour or variant
Write to us within 30 days of receipt at info@lunzo.ie with your order number and the variant you are interested in. We usually reply within 24 hours.
If the variant is available, we will send you instructions for the exchange. You pay the cost of sending the original item back; the new variant will be sent to you at no further charge.
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About the seller
This product is sold and shipped by an external seller. LUNZO guarantees you a safe purchase: online payments go through a secure payment gateway, and you handle your order, returns and complaints with us.
The following information has been provided by the product seller, who is responsible for its accuracy. The seller acts as a trader.
Seller:
Gansu Constar Technology Group Co., Ltd.
Address: No.10, Chuangxin South Road, Baiyun District, Baiyun, Gansu, China
E-mail: ksdjt@foxmail.com
Telephone: +86 156 9392 3686
Manufacturer:
Gansu Constar Technology Group Co., Ltd.
Address: No.10, Chuangxin South Road, Baiyun District, Baiyun, Gansu, China
E-mail: ksdjt@foxmail.com
Telephone: +86 156 9392 3686
EU responsible person:
BioDomi GmbH
Address: Schokoladenring 13, 65795 Hattersheim am Main, Germany
E-mail: arcontact@biodomieurope.de
Telephone: +49 178 5749814
All products from this seller