Which materials is this diamond needle file suitable for?

You can use this file on very hard materials, such as hardened steels from 54 HRC.

What does the grit size D 91 indicate?

D 91 indicates a fine diamond grit size, ideal for precision finishing and smoothing hard workpieces.

What is the main advantage of the knife profile?

The knife shape allows you to work accurately in acute angles, narrow slots, and hard-to-reach contours.

PFERD DF 4172 D 91 diamond needle file blade 140 mm D91 (fine) for hard materials - 15108061

Name: PFERD DF 4172 D 91 diamond needle file blade 140 mm D91 (fine) for hard materials - 15108061
Brand: PFERD
SKU: 41050219
Price: 32.07 EUR
Availability: PreOrder

Supplier number: PFERD 15108061 | EAN 4007220016879

32.07 tax incl.

€26.50 excl. VAT (incl. all environmental contributions)

On order: delivered from 08/10/2026

Ordered before 20:00 - delivered as of 08/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Delivered from Belgium

✆ Talk to a specialist

Precise smoothing on hardened materials

Practical benefits

Reliable on hardened steel: With the DF 4172 D 91, you efficiently shape and smooth steels with a hardness above 54 HRC.
Slender knife blade profile: The tapered knife geometry allows you to access narrow slots, sharp angles, and delicate workpiece contours.
Uniform fine D91 grit: The electroplated diamond grain delivers consistent cutting action for clean deburring and flawless surface refinement.

In a nutshell

The right choise for

With the Pferd df 4172 D 91 diamond needle file, you work with outstanding precision on hardened steels from approx. 54 hrc and other hard materials. Where standard files struggle, the fine D91 diamond grit delivers uniform material removal and smooth surface finishing. Featuring a tapered knife profile with a total length of 140 mm, a width of 5 mm, and a thickness of 1.8 mm, it easily reaches acute angles, narrow slots, and delicate workpiece geometries. It provides the control you need for deburring, detailed adjustments, and fine finishing in precision engineering and toolmaking.

Product information FAQ

€32.07

tax incl.

Key features according to our expert

Length: 140 mm
Thickness: 1,8 mm
Grit size: D91
Form: Knife
File type: Needle file
Application: Smoothing
For material: Steel with hardness from 54HRC
Width: 5 mm

Product description

PFERD diamond needle file knife 140mm D91 (fine) for hard materials

Characteristics

Diamond files and sheets are used for tasks where conventional files fail due to the hardness of the material being worked on
Diamond files and sheets are also used for processing hardened steel
The working temperatures are so low that no chemical wear occurs
This allows the higher hardness of the diamond grain to be exploited for a longer tool life
Diamond needle files can be used generally in tool making

All Features

Length: 140 mm
Thickness: 1,8 mm
Grit size: D91
Form: Knife
File type: Needle file
Application: Smoothing
For material: Steel with hardness from 54HRC
Width: 5 mm
Processing tasks: Deburring
Length, trim: 70
Workable materials: Abrasive materials

Brand PFERD
41050219
EAN 4007220016879
Supplier number PFERD 15108061

Frequently asked questions about this product

Answered by specialists

Which materials is this diamond needle file suitable for?: You can use this file on very hard materials, such as hardened steels from 54 HRC.
What are the shape and dimensions of the Pferd DF 4172 D 91?: It features a knife profile with a total length of 140 mm, a width of 5 mm, and a thickness of 1.8 mm.
What does the grit size D 91 indicate?: D 91 indicates a fine diamond grit size, ideal for precision finishing and smoothing hard workpieces.
What is the main advantage of the knife profile?: The knife shape allows you to work accurately in acute angles, narrow slots, and hard-to-reach contours.