Robot joints and actuation
12 mm bore thrust ball bearing (21 mm OD) supports a rotating shaft or joint and takes the load off the motor.
Engineering inference
goBILDA
goBILDA 12 mm Thrust Ball Bearing (21 mm OD)
goBILDA 1613-0521-0012 thrust ball bearing for 12 mm round shafting and 12 mm REX shafting: 12 mm bore, 21 mm outer diameter, 5 mm thick, bronze cage with high-carbon steel washers and balls, 6.0 g. Isolates axial load on large-shaft builds such as turntables and arms; no load ratings are published.
1613-0521-0012Development boardPrice$4.99www.gobilda.com · in stock
Buy at www.gobilda.com Overview
Motor essentials
Facts about the complete product. Unknown values remain open design questions.
A good fit for
Guidance to help you shortlist. The basis is shown for each recommendation.
Linear motion and lifts
thrust ball bearing for an 12 mm shaft or lead screw in a linear axis or lift.
Engineering inferenceNo-load speed, rated performance and stall limits describe different operating points. A stall specification is not a continuous operating rating.
3D model & CAD
3D model & CAD files
Generated from the datasheet's dimensioned drawing and measured against it. Download the STEP to check fit in your own enclosure.
- Envelope (L × W × H)
- 21 × 21 × 5 mm
- Verification
- generated
- Envelope complete
- Yes
Size & load
Size, load and fit
The shaft and housing it fits and the load it carries.
- Bearing type
- thrust ball
- Bore (ID)
- 12 mm
- Outer diameter
- 21 mm
- Width
- 5 mm
- Material
- Bronze Cage, High-Carbon Steel Washers and Balls
- Weight
- 6 g
Load ratings are only shown where the seller publishes them; size a joint bearing from the maker’s catalogue values.
Specifications
Motor performance
No-load, rated-load and stall figures retain their separate test conditions.
Stall torque and current are not continuous ratings. Check the duty cycle and starting load when choosing the driver and power supply.
Thermal limits by level
Product operating conditions, chip ambient ratings, package case limits and junction maxima remain separate.
Motor body
Mechanical dimensions
Reported product dimensions may exclude protruding components. Unknown height does not establish a complete clearance envelope.
- Length
- 21 mm
- Width
- 21 mm
- Reported height / thickness
- 5 mm
Attached generated geometry is an approximate envelope. A generated outline does not establish an electrically verified PCB footprint.
Complete structured record
Every available field, including details beyond the summaries. Null means the value has not been established.
Sourcing & files
Supplier offers
US / USD is the target market. Observed price and stock are separate from a delivery quote.
www.gobilda.com
US · USD
$4.99Minimum quantity unknown
- Observed stock
- in stock
- Checked
- Oct 1, 2026, 04:47 PM UTC
- Delivery estimate
- Not quoted
Observed within the last 24 hours. Confirm the current supplier quote.
Visit supplier (opens in a new tab)Delivery depends on quantity, postal code and shipping method. A dispatch statement such as “ship today” is not an arrival estimate.
Design files and references
Each source keeps its own verification status. Confirm the part revision and file contents before using it in a design.
Datasheet (opens in a new tab)
Manufacturer reference
goBILDA 1613-0521-0012 12 mm thrust ball bearing (render) (opens in a new tab)
Manufacturer reference
inspected: maker render of a thrust bearing — two steel washers and a bronze ball cage
STEP (generated from datasheet drawing) — link unavailable
Generated asset
cad_check passed
Generated envelope geometry may also exist for this record. It does not replace manufacturer CAD or a verified electrical land pattern.
Source evidence
Document provenance, retrieval dates and the field groups supported by each source.
Supports: spec.geometry.cad.bbox.height_mm, spec.geometry.cad.bbox.length_mm, spec.geometry.cad.bbox.width_mm, spec.geometry.cad.envelope_complete, spec.geometry.cad.mesh_path, spec.geometry.cad.step_path, spec.geometry.cad.verification, spec.geometry.dimensions.height_mm, spec.geometry.dimensions.length_mm, spec.geometry.dimensions.width_mm, spec.geometry.other.weight_g, spec.provides.bearing_type, spec.provides.bore_mm, spec.provides.features, spec.provides.material, spec.provides.outer_diameter_mm, spec.provides.width_mm, spec.usage.pinout_complete
sha256 9864caf8ebecf470b0aae84875bc1c4c90f94bdff35114159b6625790acc615d
Supports: offers
FAQ
goBILDA 12 mm Thrust Ball Bearing questions
How much does the goBILDA 12 mm Thrust Ball Bearing cost?
From $4.99 at www.gobilda.com. Prices are observed unit prices before tax and shipping.
What are the goBILDA 12 mm Thrust Ball Bearing dimensions?
21 × 21 × 5 mm. A STEP model is available for enclosure fit checks.
Where does this goBILDA 12 mm Thrust Ball Bearing data come from?
Every value in this record is traced to a source — 2 documents including the board and chip datasheets — with the page and table cited per value. Unknowns are left explicit, never guessed.