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SFM surface finish modules

Technical specifications
Documents
Part numbers

The SFM modules for the SFP2 probe system have been designed to suit the demands of specific parts and features encountered in a precision manufacturing environment.

Each SFM module is its own miniature measuring device, incorporating Renishaw's proprietary encoder system to transduce the motion of the stylus tip.

SFP2 module comparison chart


ApplicationDiamond tip radius (µm)Typical surface finish accuracy (of nominal Ra) *Skid / stylus arrangementStylus holder compatibilityLateral scanning capability

SFM-A1

SFM-A1
General purpose; engine block gasket face.2 or 5±(5% + 15 nm)Side-by-sideSFH-1, SFH-2Yes

SFM-A2

SFM-A2
General purpose; engine block gasket face, lateral scanning of crank shaft bearing journals.2 or 5±(5% + 15 nm)Side-by-sideSFH-1, SFH-2Yes

SFM-B1

SFM-B1
Scanning close to obstructive faces.2 or 5±(5% + 15 nm)Side-by-sideSFH-1, SFH-2Yes

SFM-B2

SFM-B2
Scanning close to obstructive faces; lateral scanning of crankshaft bearing journals.2 or 5±(5% + 15 nm)Side-by-sideSFH-1, SFH-2Yes

SFM-B3

SFM-B3
Awkward to reach pockets and groves.5±(10% + 20 nm)Side-by-sideSFH-1, SFH-2No

SFM-B4

SFM-B4
Extended reach into confined areas; integrated bladed rotors (IBRs) with small blades.5±(10% + 35 nm)Side-by-sideSFH-1, SFH-2No

SFM-B5

SFM-B5
Undercuts and grooves.5±(10% + 20 nm)Side-by-sideSFH-1, SFH-2No

SFM-C3

SFM-C3

Automotive engine valve guide ways.2 or 5±(10% + 35 nm)In-line (stylus lagging skid)SFH-1 onlyNo

SFM-D1

Technical drawing:  Technical drawing:  SFM-D1
Rotors, blisks and blades, especially fillet radii.2 or 5±(10% + 20 nm)In-line (stylus leading the skid)SFH-1, SFH-2No

SFM-E1

Technical drawing:  Technical drawing:  SFM-E1
Automatic transmission valve bodies, valve seats, minimum feature access (mm): Ø9 × 52 (max. depth).2 or 5±(10% + 20 nm)Stylus central to two-part skidSFH-1 onlyNo

SFM-E2

Technical drawing:  Technical drawing:  SFM-E2
Automatic transmission valve bodies, minimum feature access (mm): Ø9 × 122 (max. depth).5±(20% + 60 nm)Stylus central to two-part skidSFH-1 onlyNo

SFM-G1

SFM-G1

Straight module for inspection of small groove features (type A skid). 10 ** 0.02 - 0.3 ***Side-by-sideSFH-1, SFH-2No

SFM-H1

SGM-H1

Straight module with large radius skid for scanning with large cut-off values.

2 or 5 ±(5% + 15 nm)Side-by-sideSFH-1, SFH-2No

* Accuracy values are dependent upon a number of system variables. These include the machine size and configuration, scan orientation, condition of stylus tip, part fixturing system and environmental noise.

** Stylus tip radius (mm)

*** Feature depth range (mm)

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