How are referencing and zeroing done?

With the caliper fully closed, switch it on and press ZERO. Then lower the beam end through the red bracket's channel onto the top seating face and tighten the two nylon-tipped screws at the back. The display then measures directly from the reference plane.

How is the value read?

When the caliper's contact face just touches the tool tip, the displayed value is the tool length. No further calculation is needed; write it in the tool length table or on the tool list.

Which tool holders and calipers can it be used with?

As stated in the catalogue, it can be used with all standard depth calipers and the tool adapters are interchangeable. The holder shown is a BT40-ER32-70. Contact us about your taper type and the tool lengths you need to measure.

How does it help tool preparation off the machine?

Tools are prepared and measured while the machine runs another job, so less machine time is spent measuring. The operator enters the measured length in the CNC. The product is mechanical and has no data link to the machine.

What is the measuring accuracy?

The 0.01 mm digit on the display is the caliper's resolution, not its accuracy. Accuracy and repeatability depend on the caliper, the adapter and the contact technique; the catalogue does not state these values. Contact us for information about your application.

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TEMREN TTBO-300 Mini · Tool Length Gauge

Prepare the tool. Measure its length. Start production.

Seat the tool holder off the machine in a taper socket that behaves like the spindle, and read the tool length straight from the reference plane with a standard digital depth caliper.

Catalogue

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01Overview

A compact presetting station, off the machine.

The black body carries the tool holder; the red bracket on its side holds the digital depth caliper upright. At 147 × 110 × 100 mm it takes little room beside the machine or on the tool setting bench.

147 × 110 × 100 mmAL6061-4140Interchangeable adapter

02Reference

Measurement starts from a face that stands in for the spindle nose.

The top seating face is the reference plane. The holder's taper seats in the central socket as it would in the spindle, so the length you read starts from the same point as the tool length used on the machine. The tool adapter in the socket is interchangeable.

03Referencing and zeroing

Zero first, then reference.

1Loosen the two nylon-tipped screws at the back and lift the caliper out of the bracket.
2Close the caliper fully, switch it on with ON/OFF and press ZERO: the display reads 0.00.
3Open the caliper, lower the beam end through the channel onto the top seating face and tighten the screws. The display now reads from the reference plane.

Caliper display

Sample value generated from the 3D model's geometry. The 0.01 mm digit is the caliper's resolution, not its measuring accuracy.

04Insertion

Seat the tool holder in the socket.

The holder goes in with its cutter, taper down; once the taper faces seat, the holder is aligned on its axis. Shown here: a BT40-ER32-70 collet chuck with a Ø10 end mill.

05Measurement

Lower the contact face onto the tool tip.

Slide the caliper head down the beam and stop as soon as the horizontal contact face just touches the cutter's highest point. Tool and holder stay put; only the head moves.

Caliper display

Sample value generated from the 3D model's geometry. The 0.01 mm digit is the caliper's resolution, not its measuring accuracy.

06Reading

The display gives the tool length directly.

Because the beam end sits on the reference plane, the value on the display is the distance from the reference plane to the tool tip: the tool length L. No extra calculation or offset is needed.

Caliper display

Sample value generated from the 3D model's geometry. The 0.01 mm digit is the caliper's resolution, not its measuring accuracy.

07Second tool

Different length, same method.

Raise the head, change the holder and lower the contact face onto the new tool's tip. Shown here: a Ø12 drill in the same holder type. The reference stays put; the caliper simply reads the new length.

Caliper display

Sample value generated from the 3D model's geometry. The 0.01 mm digit is the caliper's resolution, not its measuring accuracy.

08Tool preparation

Tool lengths ready before the machine waits.

Tools are prepared and measured while the machine runs another job. The operator enters the value in the CNC's tool length table or writes it on the tool list. The TTBO-300 Mini is a mechanical presetting fixture; it has no data link to the machine.

Sample tool length entries
Tool	Cutter	L (mm)
T01	Ø10 end mill	102.90
T02	Ø12 drill	148.40

TTBO-300 Mini

Prepare. Measure. Produce.

Measure tool length off the machine with a compact body, a red caliper bracket and a standard digital depth caliper.

Technical Information Catalogue

147 × 110 × 100 mm

Outer dimensions

AL6061 · 4140

Material

Depth caliper

Works with all standard depth calipers

Interchangeable

Tool adapters

Why off the machine?

Prepare the next tool while the spindle keeps cutting.

Finding the tool length on the machine keeps the spindle and the operator waiting. With the TTBO-300 Mini the holder is prepared and measured on a separate bench while the machine keeps working.

The holder's taper seats in a socket like the spindle's, and the caliper beam starts from that seating face. The value you read is therefore the tool length used on the machine; written on the tool list, the tool arrives ready.

Section diagram, representative. The caliper beam's zero end rests on the top seating face (reference plane); when the contact face touches the tool tip, the caliper reading is the tool length L.

Spindle-like reference

The taper socket and the top seating face start the measurement from the same reference as the machine spindle.

Direct reading

With the beam end on the reference plane, the display gives the tool length directly; no subtraction or offset.

Compact and simple

147 × 110 × 100 mm, a mechanical design with no power connection, and a standard depth caliper.

How to use

Tool length in four steps.

01
Zero
Zero the closed caliper with ZERO, rest the beam end on the top seating face and tighten the screws.
02
Seat
Seat the tool holder with its cutter in the taper socket.
03
Measure
Lower the contact face until it just touches the cutter tip.
04
Record
Enter the displayed value in the tool length table or on the tool list.

Compatibility

With your own depth caliper.

As stated in the catalogue, the TTBO-300 Mini can be used with all standard depth calipers. Tool adapters are interchangeable; let us find the right adapter for your holder taper together.

Standard depth caliper
Interchangeable tool adapter
Shown: BT40

The longest tool you can measure is limited by the measuring length of the caliper used. The caliper in the photos has a 300 mm / 12 inch scale. Contact us about holder types and measuring range.

Technical Information

Catalogue

Model: TTBO-300 Mini
Use: Tool length presetting (off the machine)
Caliper compatibility: All standard depth calipers
Tool adapter: Interchangeable
Material: AL6061 – 4140
Outer dimensions: 147 × 110 × 100 mm
Caliper clamping: Red bracket, two nylon-tipped screws
Reference: Top seating face

Information from the TEMREN product catalogue and product photos. Measuring range, accuracy and repeatability are not stated in the catalogue and are therefore not given here. The 102.90 mm and 148.40 mm values in the 3D walkthrough are representative samples generated from the model geometry.

Product photos

The real product, up close.

FAQ

Common questions

Tool length: the distance from the top seating face (the reference plane that stands in for the spindle nose) to the tip of the cutting tool. It is measured off the machine, with the tool holder seated in the taper socket.

Quote

Tool length, off the machine.

Tell us your tool holder type and caliper; we will work out the right TTBO-300 Mini configuration with you.

Catalogue

Prepare the tool. Measure its length. Start production.

A compact presetting station, off the machine.

Measurement starts from a face that stands in for the spindle nose.

Zero first, then reference.

Seat the tool holder in the socket.

Lower the contact face onto the tool tip.

The display gives the tool length directly.

Different length, same method.

Tool lengths ready before the machine waits.

Prepare. Measure. Produce.

Prepare the next tool while the spindle keeps cutting.

Spindle-like reference

Direct reading

Compact and simple

Tool length in four steps.

Zero

Seat

Measure

Record

With your own depth caliper.

Technical Information

The real product, up close.

Common questions

Tool length, off the machine.