3.25D Multi-Function Indexable Boring Bar

Source the 3.25D Multi-Function Indexable Boring Bar from RONGKE, a manufacturer in China, with order details focused on the additional 3.25D reach and clearance for each operation. The 3.25D TCAP multifunction bar provides more reach than the 2.25D version in the same diameter sizes. It supports drilling, boring, facing and external turning, with clearance checked separately for each planned operation.

Key Facts at a Glance

Component Roles

Moving from 2.25D to 3.25D extends TCAP working reach without changing the diameter-based XCMT selection. The longer body envelope still needs to clear the part and fixture during facing and external turning.

Where This Configuration Fits

Choose the 3.25D Multi-Function Indexable Boring Bar when the job calls for the additional 3.25D reach and clearance for each operation. The 3.25D TCAP option provides more working reach than 2.25D at the same diameter. Review clearance for the planned boring and turning features as well as the drilling depth.

Selection guide — 3.25D vs 2.25D TCAP: the Ø20 mm working length increases from 45 to 65 mm. The insert remains XCMT10T304 and coolant thread G1/8; the longer body requires its own clearance review.

Four Configuration Decisions

1. Compare 3.25D reach with 2.25D

At D 16 mm, 3.25D lists L1 52 mm and LS 110 mm, versus L1 36 mm and LS 91 mm for 2.25D. Choose the needed reach.

2. Check clearance during boring and turning

The longer body changes the available projection but does not remove interference limits. Review the tool envelope for each planned feed direction.

3. Retain the diameter-matched XCMT size

The 3.25D Ø16 mm body uses XCMT080304, as specified in the table. Length choice does not authorize a larger insert in the same pocket.

4. Verify working-end alignment after clamping

Review the insert position with the intended holder engagement. The longer configuration should be checked as assembled before assessing the hole requirement.

Order Verification

Production & inspection

Use 3.25D working length, assembled insert runout and clearance for the planned boring/turning paths as the inspection focus. Ask for the measurement method and acceptance limits to be stated in the quotation if a dimensional report is required.

Replacement Order Details

Ask your RONGKE supplier contact to identify the additional 3.25D reach and clearance for each operation on the factory offer for the 3.25D Multi-Function Indexable Boring Bar. State the number of complete units or replacement parts needed.

FAQ

1. Q: What changes between the two Ø16 mm TCAP lengths?

A: L1 increases from 36 to 52 mm and LS from 91 to 110 mm. Both Ø16 mm versions specify XCMT080304.

2. Q: Does the extra reach permit every boring and turning path?

A: No. Check the body envelope and cutting direction for every operation.

3. Q: Should I increase insert size when choosing the longer body?

A: No. Keep the XCMT size assigned to the selected body diameter.

4. Q: Can the 2.25D setup check be assumed to cover the longer bar?

A: No. Review the longer clamped assembly and cutting-end position independently.