Hollow shaft and hollow bore cycloidal reducer options for cable pass-through, compact robot joints, and rotary modules with limited assembly space.
| Metric | Typical Range | Why It Matters |
|---|---|---|
| Hollow bore | Sized by cable route and torque class | Bore size strongly affects reducer diameter, stiffness, and cost. |
| Moment load | Application-dependent | External moment load can dominate bearing selection and lifetime. |
Reference Model Specs
Use these values for first-pass actuator sizing. Final drawing, CAD availability, inspection evidence, and acceptance limits are confirmed during RFQ.
| Model | OD | Ratios | Rated / Peak | Backlash | Stiffness | Weight | Best Fit |
|---|---|---|---|---|---|---|---|
| WF07 / MC-40 | 40 mm | 21:1, 41:1 | 15 Nm / 45 Nm | <= 1 arcmin | 1.1 Nm/arcmin | 0.42 kg | Compact humanoid wrist, elbow, inspection, and light robot axes |
| WF17 / MC-79 | 79 mm | 21:1, 41:1, 61:1 | 50 Nm / 150 Nm | <= 1 arcmin | 6 Nm/arcmin | 0.85 kg | Humanoid elbow/knee, quadruped joints, compact QDD actuators |
| WF25 / MC-107 | 107 mm | 21:1, 31:1, 41:1, 51:1, 81:1 | 110 Nm / 330 Nm | <= 1 arcmin | 24 Nm/arcmin | 2 kg | High-load humanoid, exoskeleton, and compact robot joint axes |
| Decision Point | Choose When | Verify Before Quote | Next Internal Step |
|---|---|---|---|
| Hollow bore is the first sourcing filter | Best for buyers that need reduction and through-routing in one compact package. Use this path when hollow bore (Sized by cable route and torque class) is more important than starting from a generic gearbox size. | Bore size strongly affects reducer diameter, stiffness, and cost. Include required hollow bore diameter in the first RFQ packet. | Compare Product Families |
| Mechanical interface risk is visible early | Confirm required bore diameter before reducer size selection. | Cable-route conflict: Review bore diameter and bend-radius assumptions before quote. | Send RFQ Package |
| Sample acceptance must be measurable | Use prototype planning when moment load must be confirmed against buyer-side machine tests. | Output bearing overload: Share external load direction, payload offset, and duty cycle. | Plan Prototype Validation |
| Phase | Engineering / QC Checkpoint | Buyer Output |
|---|---|---|
| Requirement baseline | Required hollow bore diameter; Ratio, output speed, and torque profile. Confirm drawing revision, quantity, destination, and timeline in the same packet. | A quote-ready RFQ sheet that separates required performance from preferred options. |
| Engineering fit review | Confirm required bore diameter before reducer size selection. Check output moment load, bearing support, and external fixture design. Record open issues before sample cost and lead time are frozen. | A reducer shortlist and issue log for Hollow Shaft Cycloidal Reducer. |
| Prototype or incoming validation | Measure hollow bore and moment load against the agreed method. Review bore diameter and bend-radius assumptions before quote. | Inspection and test evidence with pass/fail limits, measured values, and revision actions. |
| Batch control and export readiness | Output bearing overload: tie the control plan to outgoing inspection, packaging, labeling, and shipment records. | Repeat-order package covering drawing baseline, CTQ records, packaging rules, forecast, and Incoterm. |
Manufacturing Evidence Pack
Use this pack to move a reducer inquiry from catalog interest to buyer-reviewable engineering evidence. The current page can frame the evidence path; approved reports, certificates, and drawings still need to come from the actual model-family review.
Scope
Product evidence path
Source
/products/hollow-shaft-cycloidal-reducer
These images support product recognition and envelope review. They are not inspection reports, certificates, or measured test results.
Buyer Review
Tooth profile, pin wheel, eccentric shaft, housing datum, bearing fit, and output interface reviewed as one reducer system.
Artifact to Request
Process photos, CTQ dimension list, approved 2D drawing, CMM or critical-dimension record when available.
Release Status
Requires model-family approval
Buyer Review
Which material route and hardness target apply to this model instead of a generic catalog claim.
Artifact to Request
Material route note, heat-treatment target, hardness inspection field, and sample-lot traceability scope.
Release Status
Do not assume one route for every model
Buyer Review
Backlash method, run-in state, no-load torque, stiffness expectation, noise observation, and smooth low-speed motion.
Artifact to Request
Backlash measurement method, sample acceptance table, no-load torque check, run-in note, and buyer limits.
Release Status
Needs measured sample data
Buyer Review
Envelope, motor pilot, hollow bore, output flange, fastener access, tolerances, and NDA needs before STEP release.
Artifact to Request
Closest reference STEP or PDF, revision note, restricted-drawing release rule, and engineering contact path.
Release Status
Released by engineering check
Buyer Review
Inspection fields, packing method, destination paperwork, batch labeling, sample scope, and repeat-order controls.
Artifact to Request
Outgoing QC checklist, packaging/export record example, batch traceability field, and approved shipping constraints.
Release Status
Align before PO
| Evidence Area | Buyer Review | Artifact to Request | Release Status |
|---|---|---|---|
| Machining route | Tooth profile, pin wheel, eccentric shaft, housing datum, bearing fit, and output interface reviewed as one reducer system. | Process photos, CTQ dimension list, approved 2D drawing, CMM or critical-dimension record when available. | Requires model-family approval |
| Material and heat treatment | Which material route and hardness target apply to this model instead of a generic catalog claim. | Material route note, heat-treatment target, hardness inspection field, and sample-lot traceability scope. | Do not assume one route for every model |
| Backlash and motion check | Backlash method, run-in state, no-load torque, stiffness expectation, noise observation, and smooth low-speed motion. | Backlash measurement method, sample acceptance table, no-load torque check, run-in note, and buyer limits. | Needs measured sample data |
| Drawing and revision control | Envelope, motor pilot, hollow bore, output flange, fastener access, tolerances, and NDA needs before STEP release. | Closest reference STEP or PDF, revision note, restricted-drawing release rule, and engineering contact path. | Released by engineering check |
| Outgoing QC and export pack | Inspection fields, packing method, destination paperwork, batch labeling, sample scope, and repeat-order controls. | Outgoing QC checklist, packaging/export record example, batch traceability field, and approved shipping constraints. | Align before PO |
No certificate or test result should be displayed until approved. Keep the page useful by showing the review path, then attach real evidence during RFQ or after factory approval.
CAD / STEP Data Pack
Use this reducer family request when your team needs a model file, envelope drawing, or engineering data before committing layout space. We verify the target family, revision, and release constraints first so buyers do not design around the wrong CAD file.
Confirm released model files, closest reference family, and file-release constraints before CAD freeze.
Align motor pilot, output flange, hollow bore, cable route, bolt circle, and axial envelope early.
Request backlash method, run-in note, inspection fields, and sample acceptance data for the selected family.
Inquiry Email
Best for sending NDA terms, drawings, or a specification sheet.
Instant Chat
+8618857971991
Best for quick model availability and file-release checks.
Submit the minimum engineering context needed for model-file screening and revision-safe follow-up.
Direct RFQ
The form keeps this product family attached to the inquiry so sales engineering can review ratio, torque, backlash, interface, quantity, and delivery assumptions in one thread.
Yes, when bore diameter, torque, backlash, and output support are validated as a single package.
The output-side interface drawing is the priority, followed by input speed, ratio, and load data.
Engineering Route
Hollow Shaft Cycloidal Reducer should lead to a clear application review, DFM check, prototype evidence plan, and RFQ handoff instead of stopping at a catalog comparison.
Check reducer architecture, model family, envelope class, and CAD availability before the quote is treated as final.
Review the machine or robot axis context so torque, shock, backlash, stiffness, and validation risk stay tied to real use.
Move from fit review into DFM, sample validation, inspection records, packaging, and repeat-order control.
Use these links when the buyer is ready to send requirements, compare directories, or review sourcing guidance.
Inquiry Email
Include ratio, torque, backlash, interface drawings, quantity plan, and destination terms.
Instant Chat
+8618857971991
Use chat for quick routing; drawings and technical details can move to email.
