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header-product Twist Drill Bit Bosch HSS Cobalt 5.1 mm – single piece
6.99 €

Twist Drill Bit Bosch HSS Cobalt 5.1 mm – single piece

Bosch HSS Cobalt Twist Drill Bit 5.1 mm Photo 1
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Twist Drill Bit Bosch HSS Cobalt 5.1 mm – single piece

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Twist Drill Bit Bosch HSS Cobalt 5.1 mm – single piece

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Short description

Bosch HSS Twist Drill Bit Cobalt is a single 5.1 mm high-speed steel twist drill with cobalt alloy for improved heat resistance and wear life. Designed for drilling with drills and rotary hammers where a twist drill bit is required. Suitable for metalworking, machining and general-purpose drilling tasks requiring durable, precision holes.
Available for order: 28 pcs.
Warranty: 2 Years
SKU: 11719881
free shipment

Cheapest delivery:

Venipak Pickup LV, Venipak Locker LV

Pick-up points

Venipak Pickup LV

Venipak Locker LV

Cost

1.89 €

Deliver

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
21.07.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
24.07.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 €
Parcel couriers
Venipak Pickup LV / Venipak Locker LV / Latvijas Pasts pakomāts / Unisend LV / DPD Paku skapis / Omniva LV / Latvijas Pasts nodaļa
24.07.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.89 €
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Payment Methods:
Bank transfer, Bank cards on-line, Apple Pay, Google Pay
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Product information

Description

Bosch HSS Cobalt twist drill bit 5.1 mm is a single high-speed steel drill with added cobalt alloy designed for demanding metalworking tasks. Manufactured to DIN 338 with a Type N flute geometry and a 135° split-point tip, this drill bit delivers precise centring and reduced wandering for accurate holes. The fully ground HSS body and cobalt content improve heat resistance and wear life, making the 5.1 mm bit suitable for drilling a range of ferrous materials including stainless and alloyed steels. The cylindrical shank equals the drill diameter and is compatible with three-jaw chucks, intended for use in hand-held drill drivers and drill stands.

Advantages

The cobalt alloy and fully ground HSS construction provide enhanced wear resistance and higher temperature tolerance compared with standard HSS bits. The 135° split-point tip ensures active cutting and self-centering to reduce walking at the start of a hole. Two cutters and two flutes enable efficient chip removal, which helps maintain cutting performance and extends the tool life. Diameter tolerance h8 and precision manufacturing give consistent hole sizes suitable for machining and assembly work.

Suitable for

  • Drilling stainless steel and acid- or heat-resistant steels
  • General metalworking and machining operations
  • Creating precision holes in non-alloyed and alloyed steels
  • Use in drill stands and hand-held drill drivers with three-jaw chucks

Key specifications

  • Drill type: Twist drill bit, fully ground
  • Material: High-speed steel (HSS) with cobalt alloy
  • Tip angle: 135° split-point for reduced walking
  • Flute type: Two cutters and two flutes for rapid chip evacuation
  • Standard: Manufactured to DIN 338
  • Diameter: 5.1 mm
  • Overall length: 86 mm
  • Shank: Cylindrical shank equal to drill diameter (suitable for three-jaw chucks)
  • Diameter tolerance: h8 for precision holes
  • Pack quantity: 1 piece

How to use

Secure the Bosch HSS Cobalt 5.1 mm bit in a three-jaw chuck or appropriate drill holder, ensuring the shank is clamped firmly. Select a suitable cutting speed and feed for the material being drilled; lower speeds and steady feed are recommended for stainless and high-alloy steels to avoid overheating. Use cutting fluid or coolant when drilling tougher steels to improve chip evacuation and extend tool life. Start drilling with light pressure to allow the split-point tip to self-center, then apply consistent feed until the hole is completed. After use, clean chips from the flutes and store the bit dry to prevent corrosion.

Usage recommendations

For best performance when drilling stainless steel and high-alloy materials, use a reduced spindle speed, steady feed, and appropriate coolant. Avoid excessive pressure and high speeds which increase heat and wear. Match drill speed and coolant choice to the workpiece material for longer service life and consistent hole quality.

All features
Product colour:
Bronze
Length:
86 mm
Proper use:
Rotary hammer, Drill
Working length:
52 mm
Suitable for materials:
Cast steel, Steel, Stainless steel, Non-alloyed steel, Metal, Cast iron
Drill bit diameter:
5.1 mm
Shank shape:
Cylindrical shank
DIN compliance:
338
Drill bit material:
Cobalt Alloy High-Speed Steel (HSS-Co)
Number of drill bits:
1 pc(s)
Number of cutting edges:
2
Drill bit type:
Twist drill bit

Description

Machine translation. Load original

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Customer reviews

Customer questions

FAQ

How much does the Bosch HSS Cobalt Twist Drill Bit 5.1 mm cost, and is it available for purchase?

The price is 6.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 28 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 21.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All Bosch products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Bosch service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.
warranty
14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
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Quality Since 2008 AiO.lv has been on the market for over 18 years and has earned trust — with more than 6000 genuine positive reviews on Google.