Machine Tap JIS B-4430 Form C HSS-G - Rp (BSPP) 1/16 x 28

With this machine tap, you benefit from the following advantages:

• For general use in metalworking.
• Suitable for non-abrasive materials up to 900 N/mm², especially unalloyed and low-alloyed steels.
• Can be used for hand and machine thread cutting.
• Ideal for through and blind holes.
• Cylindrical pipe thread Rp (BSPP) according to ISO 7-1, 55° flank angle – designed for pressure-tight connections with conical R external threads.

1. Preparation: Drill the core hole with the correct nominal diameter for Rp/BSPP 1/16 x 28. Deburr the hole carefully.
2. Clamping: Securely clamp the tap vertically in a tap wrench or machine holder.
3. Lubrication: Apply plenty of high-quality cutting oil to the tool and the hole.
4. Starting: Position the tap exactly vertical and start turning clockwise with steady pressure until it engages cleanly.
5. Tapping: Continue with a smooth, steady rotation. Ensure regular lubrication during the process.
6. Finishing: Once the desired depth is reached, carefully turn the tap counterclockwise to remove it completely.
7. Inspection: Clean the finished thread and check it with a suitable thread gauge or matching part.

• Thread type Rp (BSPP) – cylindrical pipe thread ISO 7-1
• Angle 55° flank angle (Whitworth profile)
• Form Form C (JIS B-4430)
• Material HSS-G (ground high-speed steel)
• Nominal size PS 1/16 x 28
• Overall length (L1) 55 mm
• Thread length (L2) 19 mm
• Shank diameter (D2) 6.5 mm
• Square drive 5 mm
• EAN 4022835954026
• Article number 95402
• Application Hand and machine use; through & blind holes; steels ≤ 900 N/mm²

Q1: What is the difference between Rp (BSPP) and Rc (BSPT)?

A1: Rp is a cylindrical internal thread (BSPP) according to ISO 7-1, while Rc is a tapered internal thread (BSPT). Rp threads are sealed pressure-tight when combined with R (tapered) external threads.

Q2: What is Form C used for?

A2: Form C (medium chamfer length) is versatile and suitable for through and blind holes, offering good starting and sufficient chip space.

Q3: What are the advantages of HSS-G?

A3: HSS-G provides you with high precision, clean thread surfaces, and longer tool life thanks to ground cutting edges.

Q4: Which materials are suitable?

A4: All non-abrasive materials up to 900 N/mm², especially unalloyed and low-alloy steels.

Q5: Can you use this tap both by hand and machine?

A5: Yes, it is designed for both applications. Just make sure to clamp it correctly and apply proper lubrication.