TBI-STD / Power + signal

Standard Thru-Bore & Hollow-Shaft Slip Rings

Route a rotating shaft, service cable or mechanical linkage through the center while transferring power and low-level signals around it.

Typical design brief: Rotary indexing tables, packaging machines and hollow robotic joints.

Configure TBI-STD ↗Request drawing / STEP →

Concept section showing open center bore, annular contact paths, rotor and stator — Architecture concept · illustrative geometry, not a released product drawing.

IMPERIAL / METRIC SELECTION ENVELOPE

Define the bore and every circuit.

These are design request ranges, not an orderable stock specification. Exact dimensions, current derating and maximum speed require a released drawing.

Model / family	Thru-bore ID (in / mm)	OD × L (mm)	Power circuits	Signal / data channels	Max speed (RPM)
TBI-STD 6–120 requested circuits	0.5 in / 12.7 mm	Drawing review required	10 / 15 / 30 A requested per ring	2 / 5 A signal circuits	Duty-specific review
TBI-STD 6–120 requested circuits	1.0 in / 25.4 mm	Drawing review required	10 / 15 / 30 A requested per ring	2 / 5 A signal circuits	Duty-specific review
TBI-STD 6–120 requested circuits	1.5 in / 38.1 mm	Drawing review required	10 / 15 / 30 A requested per ring	2 / 5 A signal circuits	Duty-specific review
TBI-STD 6–120 requested circuits	2.0 in / 50.8 mm	Drawing review required	10 / 15 / 30 A requested per ring	2 / 5 A signal circuits	Duty-specific review
TBI-STD 6–120 requested circuits	2.75 in / 69.85 mm	Drawing review required	10 / 15 / 30 A requested per ring	2 / 5 A signal circuits	Duty-specific review
TBI-STD 6–120 requested circuits	3.0 in / 76.2 mm	Drawing review required	10 / 15 / 30 A requested per ring	2 / 5 A signal circuits	Duty-specific review
TBI-STD 6–120 requested circuits	4.0 in / 101.6 mm	Drawing review required	10 / 15 / 30 A requested per ring	2 / 5 A signal circuits	Duty-specific review
TBI-STD 6–120 requested circuits	Metric 50 mm / ≈1.969 in	Drawing review required	10 / 15 / 30 A requested per ring	2 / 5 A signal circuits	Duty-specific review
TBI-STD 6–120 requested circuits	Metric 70 mm / ≈2.756 in	Drawing review required	10 / 15 / 30 A requested per ring	2 / 5 A signal circuits	Duty-specific review
TBI-STD 6–120 requested circuits	Metric 100 mm / ≈3.937 in	Drawing review required	10 / 15 / 30 A requested per ring	2 / 5 A signal circuits	Duty-specific review

Exact imperial conversions: 0.5″ = 12.7 mm · 1″ = 25.4 mm · 1.5″ = 38.1 mm · 2″ = 50.8 mm · 3″ = 76.2 mm · 4″ = 101.6 mm. Metric 50 / 70 / 100 mm bores remain separate choices.

APPLICATION REVIEW

What determines a workable TBI-STD?

Bore fit is only one constraint. Check outer diameter, installed length, rotor fixing, axial clearance, lead exit and duty cycle.

Shaft diameter and tolerance; bore clearance
Continuous and peak current for each circuit
Running speed, starts, reversals and required service life

Replacing an existing assembly? →

Concept mounting: rotor on independently supported shaft, stator tab restrained with compliance

Give the stator a flexible stop.

For a shaft-mounted design, secure the rotor as its drawing specifies and restrain the stator with an anti-rotation tab that accommodates misalignment. Avoid rigidly locking both sides. Mounting is model-specific; flange and capsule designs may differ.

Read the mounting checklist →

CONNECTORS / LEADS / ENCLOSURE

Send a complete TBI-STD requirement.

Choose termination, wire length and mounting options below. Displayed accessory amounts are planning allowances; compatibility and final cost are confirmed with the quotation.

30-second configuration brief

Full name *Work email *Company *Country / delivery destinationProduct seriesRequired thru-bore ID *Power circuits & current / voltage *Signal, Ethernet or bus channels *Operating RPM & special environment *Quantity / existing model

Family ranges are reviewed together: selecting a larger bore does not establish high-speed or data-path compatibility. Enter an exact size in notes when choosing a nonstandard bore.

Mechanical envelope & project notes *

Assembly options

Illustrative accessory allowances, subject to compatibility and written quotation. Two options are preselected; clear either if unnecessary. Connector quantity, circuit count, wire gauge, custom harness work, sealing, shipping and any NRE are priced for the agreed configuration.

Pre-terminate rotor & stator leads+$65Extend leads beyond standard 300 mm+$45IP65 / IP68 enclosure review+$85Anti-rotation tab, torque arm & collar+$30

Connector preferenceExtended lead length

Connector and extended-length selections apply only when their corresponding assembly option is checked. Wire material, sealing scope and connector suitability require approval.

No payment is collected. No stock, dispatch date or performance is reserved by this request.

TBI-STD engineering questions

Is a 2-inch bore the same as 50 mm?

No. Exactly 2.000 inches is 50.8 mm. A 50 mm bore will not clear a 50.8 mm shaft. Specify the exact required clearance.

Can signal rings be combined for power?

Do not parallel rings without an approved current-sharing and thermal design. Submit each circuit current separately.

Compare adjacent slip ring architectures.

DEFINE THE ROTATING INTERFACE

Start with the bore.
Build the circuit schedule.

Send your shaft size, current, data interface and duty. Request a drawing and configuration-specific quotation.

Request engineering review ↗