TORX PLUS 8IP Tool Screw|M2.5×6.5 (0.45 Pitch)

TORX PLUS 8IP tool screw in M2.5×6.5 with 0.45 mm pitch, for the smallest indexable inserts.

Key specifications

Installationtorqued to the tool maker's value
StandardGB/T 3098.1, ISO 16047
Typical substrateindexable carbide inserts
Key inspectionshead cone, recess, thread gauging, hardness
Thread SizeM2.5 × 6.5mm
Drive TypeTorx Plus 8IP

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Product overviewOverview

A tool screw holds the carbide insert in its pocket by preload: the resulting friction resists the cutting force. At M2.5 the screw develops little clamp force, so seat contact and engaged thread length matter more than torque. A worn 8IP bit rounds the socket before the screw reaches its rated torque, and a rounded socket is the usual reason an insert starts to move.

installed by torqued to the tool maker's value.

Key featuresFeatures

Small socket wears first: replace 8IP bits on a counted schedule.
Head-to-thread coaxiality is controlled to avoid tilting the insert during clamping.
Head diameter, length, recess depth and thread length can be made to the holder drawing.
Alloy steel quenched and tempered to class 12.9, with strength and hardness to GB/T 3098.1.

Typical applicationsApplications

Drill and reamer clamping
Swiss-type lathe tool stations
Fine boring and adjustment heads

Selection notesSelection

Judge the assembly by insert movement under cut, not by torque alone; torque scatter at this size is larger than the difference between a good and a loose seat.

Frequently asked questionsFAQ

Why do 8IP sockets round off?

The socket is small and the bit tip wears. Once the tip loses its profile the contact area drops and the socket deforms, so bits should be changed on a counted schedule rather than after a screw spins.

What matters during installation of the TORX PLUS 8IP Tool Screw|M2.5×6.5 (0.45 Pitch)?

Tighten it to the torque the tool maker publishes. Small socket wears first: replace 8IP bits on a counted schedule.

Specifications

Thread Size	M2.5 × 6.5mm
Drive Type	Torx Plus 8IP
Standard	GB/T 3098.1, ISO 16047
Drive	star recess
Installation	torqued to the tool maker's value
Typical substrate	indexable carbide inserts
Key inspections	head cone, recess, thread gauging, hardness

Manufacturing and inspection

Torque-to-clamp-force is measured to ISO 16047 to confirm lot-to-lot friction stability.Material certificates and dimensional records accompany each lot; material and dimensional records are supplied per batch.