4.3 mm Step Drill Bit HSS M35 with Cobalt Seven-Step Tip Total Length 75 mm Cylindrical Shank For Steel Iron and Stainless Steel
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The 4.3 mm step drill bit is designed for drilling holes in metal materials. It is made from HSS M35 high-speed steel with cobalt, suitable for working with iron, structural steel, and stainless steel. The tip features seven small steps that smoothly transition to the full diameter. The spiral groove removes chips from the hole while drilling. The 4.3 mm diameter is ideal where a hole slightly wider than a standard 4 mm is required.
The total length of the drill bit is 75 mm, with a spiral working length of 43 mm. This is sufficient for drilling into sheets, flat bars, angles, and thin-walled profiles. The cylindrical shank can be clamped into the chuck of cordless drills, mains drills, and pillar drills. Detailed photographs show the shape of the step tip and the spiral progression.
Compared to a standard spiral drill bit, this model has seven steps at the tip with gradually increasing diameters. The smallest step first creates a narrow hole in the metal, and the subsequent steps gradually widen it. The full diameter of 4.3 mm is achieved only after passing through all the steps. This allows for the hole to be created in one operation without pre-drilling with a smaller bit. The marks of the individual steps in the wall of the hole are visible in the product photographs.
- Type – spiral drill bit with step tip
- Diameter – 4.3 mm
- Working Length – 43 mm
- Total Length – 75 mm
- Material – high-speed steel HSS M35 with cobalt
- Tip – seven steps gradually transitioning to full diameter
- Shank – cylindrical
- Usage – drilling into iron, steel, and stainless steel
- Contents – 1 piece of 4.3 mm step drill bit
When drilling into steel and stainless steel, use cutting oil or coolant to reduce overheating of the tip. Adjust the speed according to the diameter of the drill bit and the type of metal, and guide the drill straight and perpendicular to the surface without excessive pressure. After use, clean the drill bit of chips and oil residues and store it in a way that prevents the tip from being damaged by other tools. The drill bit is useful, for example, when installing metal brackets, consoles, and hinges, when modifying locksmith products, or when repairing metal garden furniture. It is also suitable for drilling holes for rivets and screws into sheet metal covers, cabinets, and frames. Before drilling, mark the spot for the hole with a centre punch to prevent the tip from slipping on smooth surfaces.
The 4.3 mm drill bit with a step tip is suitable for workshops, garages, and occasional DIY work with metal. Cobalt high-speed steel M35 can also handle drilling into stainless steel. The seven steps at the tip gradually enlarge the hole to the full diameter. The cylindrical shank fits all standard drills. In the package, you will receive one drill bit with a diameter of 4.3 mm.
Delivery
Delivery to address€1.99
Estimated delivery: 23 November – 4 December
Shipped from China
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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.
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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
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- 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