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Technical Specification
PRODUCT NUMBER AK4749085920-02AK4733AK4744AK4722AK4732
Type Step DrillStep DrillStep DrillStep DrillStep DrillStep Drill
Size 22mm22mm30mm
Size Range 11-25mm11-25mm26-50mm
Thread M2

Q 1. What sizes does the AK4743 step drill set cover?

A. Size 1 covers Ø4-12mm, Size 2 covers Ø4-20mm in 2mm increments, and Size 3 covers Ø4-32mm in 2mm increments - 18 different hole sizes in total across the three bits.

Q 2. What material are the AK4743 step drills made from?

A. The step drills are made from HSS M2 high-speed steel with 5% cobalt.

Q 3. What is the advantage of the spiral flute design on the AK4743?

A. The double spiral flutes provide efficient swarf clearance, allowing clog-free, precision drilling.

Q 4. How many hole sizes can the AK4743 set drill?

A. The three bits together cover 18 different hole sizes.

Q 5. Does the AK4743 come with a storage case?

A. Yes, the set is supplied in a storage case.

Q 6. Are there alternative step drill sets available?

A. Yes. Alternative step drill options include AK4733, AK4746, and AK4749.

Q 7. How does the AK4743 compare to standard straight-flute step drills?

A. The AK4743 uses double spiral flutes rather than straight flutes, which the manufacturer states provides more efficient swarf clearance for clog-free drilling.

Q 8. How long does delivery take?

A. Standard UK mainland delivery is 3-5 working days.

Q 9. What payment methods do you accept?

A. We accept all major credit and debit cards, along with PayPal.

Q 10. Can I ask questions about this product before ordering?

A. Yes. Please contact Parts for Machines via the website or phone for pre-sales advice on compatibility or specification.

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