Turn a 17HS datasheet row into a decision: whether the sheet is usable for first-pass selection, where it can fail, and what to ask before RFQ or sample purchase.
Tool intent
Immediate
Report evidence
16 sources
Review cadence
6 months
The report layer explains why the tool result is bounded. Each conclusion states who should use it, who should not, and which evidence supports the claim.
NEMA 17 is a mechanical frame context and 17HS is a supplier-family label. 17HS4401, 17HS4401N, 17HS4401S, and longer-stack 17HS19 rows can show different torque or winding values, so exact suffix and supplier revision are the identity.
Use when: Buyers comparing supplier PDFs, marketplace listings, and sample lots.
Do not use when: Teams expecting one universal 17HS pinout or one fixed torque value.
S1-S5, S11-S12, S16A 40-45 N.cm sheet can still miss the target at speed if inductance, supply voltage, current limit, or thermal duty are mismatched.
Use when: Designers screening torque margin before requesting speed-torque curves.
Do not use when: Projects releasing production BOMs from holding torque alone.
S6Rated current, phase resistance, and inductance define nameplate voltage and current-response behavior. A substitute with the same torque but different winding is not equivalent.
Use when: Procurement teams approving alternates or second sources.
Do not use when: Teams without driver current, supply voltage, or thermal constraints.
S2-S5The same 17HS motor can be acceptable with one driver-current and cooling setup but risky with another board or firmware pulse timing.
Use when: 3D printer, CNC, camera slider, and robotics builders using chopper drivers.
Do not use when: Applications with unknown firmware timing or sealed enclosures.
S7-S9The page should convert a datasheet into actions: request speed-torque curve, coil-temperature test conditions, exact suffix, cable/connector details, and RoHS/REACH evidence when regulated supply chains matter.
Use when: Teams moving from search result to sample order.
Do not use when: Buyers who only need a downloadable PDF archive.
S1-S16Nameplate voltage
rated current x phase resistance
Time constant
phase inductance / phase resistance
Dynamic screen
holding torque x derating factors
Release gate
supplier curve + thermal test
Use this table when comparing a search-result PDF, marketplace listing, and supplier confirmation sheet.
| Field | What it means | Decision use | Risk if ignored |
|---|---|---|---|
| Model suffix | Exact supplier identity: winding, stack, shaft, cable, lead count. | Reject substitutions that hide suffix changes. | Listings may shorten 17HS4401N/S to 17HS4401. |
| Step angle | Full-step angle, usually 1.8 degree or sometimes 0.9 degree. | Determines steps/rev and motion resolution. | Does not prove torque, current, or accuracy by itself. |
| Holding torque | Static torque at rated current while stopped. | Initial load-screen input only. | Can overstate running torque at high RPM. |
| Rated current/phase | Coil current target per phase under rated conditions. | Sets driver current limit and thermal burden. | Board-level driver limits may be below chip headline current. |
| Resistance/phase | DC coil resistance used to compute nameplate voltage. | Checks whether the winding matches the published voltage. | A different resistance changes current setting and heat. |
| Inductance/phase | Coil current response characteristic, often measured at 1 kHz. | Flags high-speed torque risk and substitution mismatch. | High L/R can reduce current rise at speed. |
| Body length | Stack length such as 34, 40, 48, or 60 mm class. | Screens envelope and rough torque tier. | Same 42 mm face can have very different stack length. |
| Lead count / connector | 4-wire bipolar leads, plug, cable length, and color code. | Controls wiring compatibility and assembly time. | Wire colors are not universal; verify coil pairs. |
A common sourcing failure is treating "NEMA 17" or "17HS" as a full specification. The public evidence supports a narrower rule: frame labels help mechanical matching, while the exact suffix and revision-controlled sheet decide electrical release.
| Claim | Evidence boundary | Decision rule | Missing data to mark TBD | Refs |
|---|---|---|---|---|
| NEMA 17 is a mounting family, not a performance class | NEMA ICS 16 covers motion/position motors and related controls; manufacturer guidance maps NEMA17 to about a 1.7 inch / 42 mm flange. | Use NEMA17 to check face size, bolt pattern, and mechanical fit only. | Torque curve, rated current, resistance, inductance, rotor inertia, shaft load, and insulation class still require the exact model sheet. | S11-S12 |
| 17HS4401-class defaults are not universal | Public 17HS examples range from about 40 N.cm / 1.7 A rows to 59 N.cm / 2 A longer-stack rows. | Treat default values as an example only; replace every field before RFQ or sample release. | If the supplier cannot confirm suffix, stack length, and I/R/L values, mark the candidate as TBD / no reliable public data. | S2-S5, S16 |
| Driver-board implementation can override chip headline limits | A4988 carrier documentation distinguishes active current limiting and notes full-step coil current behavior; TI and ADI datasheets define separate supply/timing/current envelopes. | Validate board-level current setting, cooling, firmware pulse timing, and supply voltage together. | Public motor datasheets rarely specify your carrier-board heatsinking, enclosure airflow, or firmware acceleration profile. | S7-S9, S13 |
| Compliance statements need article-level evidence | RoHS, REACH Article 33, and SCIP obligations are tied to regulated substances and EU-market articles, not just motor torque/current values. | Ask for RoHS declaration, REACH/SVHC statement, cable/connector material declarations, and revision/date on the supplier file. | If only a marketplace page says "RoHS" with no declaration or revision, keep compliance status as TBD. | S14-S15 |
This page is intentionally not another generic NEMA 17 page. It owns the datasheet interpretation job and links out to broader pages when the user needs frame or family context.
| Resource | Best for | Evidence needed | Limitation |
|---|---|---|---|
| 17HS datasheet page | Reading one model sheet and deciding if it is RFQ-ready. | Exact model suffix, I/R/L values, body length, driver target. | Does not replace a measured speed-torque curve. |
| Generic NEMA 17 guide | Understanding frame size and broad application fit. | Frame, shaft, mounting, broad torque class. | Too broad for second-source approval. |
| 17HD family guide | Comparing HD-labeled variants and stack tiers. | 17HD model family, torque tier, current, envelope. | Not every 17HS supplier uses 17HD naming. |
| Supplier PDF only | Checking official dimensions and compliance statements. | First-party PDF and revision/date if available. | Usually gives fields, not selection logic. |
17HS search results often mix official files, distributor copies, and mirrored PDFs. Use the ladder to decide whether a row can support RFQ, engineering review, or only a preliminary search note.
| Evidence type | Confidence | Accept when | Escalation path |
|---|---|---|---|
| First-party revision-controlled PDF | Highest | Supplier name, model suffix, revision/date, mechanical drawing, electrical table, and test conditions are visible. | Still request speed-torque curve if the sheet only lists holding torque. |
| Supplier product page with downloadable sheet | Medium-high | Page data and attached PDF match on suffix, torque, current, resistance, inductance, shaft, and cable. | Ask sales/FAE to confirm which file controls if page and PDF disagree. |
| Distributor page | Medium | Useful for procurement availability and basic attributes, but not enough for engineering release. | Trace back to manufacturer PDF or request a controlled drawing pack. |
| PDF mirror or forum-uploaded sheet | Low | Use only as a clue to identify possible model families. | Mark as TBD / no reliable public data until supplier confirms current revision. |
The highest risk is not that a datasheet lacks numbers. It is that copied or shortened numbers hide a different winding, driver boundary, or thermal condition.
| Risk | Impact | Signal | Mitigation |
|---|---|---|---|
| Suffix compression | Wrong winding or torque class ordered. | Listing title omits N/S/B suffix or lead variant. | Ask supplier to confirm exact label printed on motor and PDF row. |
| Holding torque misuse | Motor stalls at speed despite a strong static rating. | No speed-torque curve or voltage/current condition. | Request curve at target supply voltage and current limit. |
| Driver overheating | Skipped steps, shutdown, or shortened board life. | Current limit near rated phase current in a closed enclosure. | Measure coil and driver temperature under duty cycle. |
| Connector mismatch | Assembly rework or reversed phase wiring. | Sheet lists wire colors but buyer uses another cable harness. | Verify coil pairs with meter and lock connector drawing. |
| Mirrored data | Old or copied spec row survives after supplier revision. | No date, no manufacturer, or only a PDF mirror. | Use mirrors as clues, then obtain current supplier confirmation. |
A passing checker result should become a supplier data request, not an automatic purchase order. These fields close the gaps that public 17HS datasheets usually leave open.
| Request | Fields to ask for | Decision reason |
|---|---|---|
| Exact identity | Full model suffix, supplier part number, motor label photo, drawing revision/date. | Prevents shortened 17HS4401-style titles from hiding winding, shaft, cable, or connector changes. |
| Electrical release pack | Rated current, phase resistance, phase inductance, insulation class, dielectric test, operating temperature statement. | Lets engineering verify driver current, heat, winding match, and environmental boundary before samples. |
| Motion evidence | Speed-torque curve at requested voltage/current, rotor inertia, detent torque, radial/axial shaft load limits. | Converts holding torque into running-risk evidence for the real axis. |
| Harness and compliance evidence | Connector drawing, wire gauge, cable temperature rating, RoHS declaration, REACH/SVHC statement, SCIP status if applicable. | Avoids late failures in assembly, cable heating, and EU-market material compliance. |
Each scenario shows the practical boundary between a fast datasheet screen and the evidence required for release.
Premise: Buyer finds a 17HS4401-class listing with 40 N.cm and wants a drop-in motor.
Process: Copy current, resistance, inductance, cable, shaft, and body length; compare against the original driver current and connector.
Outcome: Accept only if the winding and harness match; otherwise request a curve and connector drawing before sample purchase.
Premise: A procurement team has a working NEMA 17 axis but supplier lead time is long.
Process: Screen substitute sheets by I/R/L and stack length, then verify holding torque and speed target in the checker.
Outcome: Shortlist only models with comparable electrical time constant and enough dynamic torque window.
Premise: Designer cares more about smooth low-speed motion than high RPM.
Process: Use the tool at low RPM, confirm 1.8 degree steps/rev, and check driver microstepping support separately.
Outcome: A moderate 17HS can be sufficient if thermal load is controlled and resonance is tested.
Premise: A robot joint uses a compact enclosure and continuous positioning duty.
Process: Raise ambient and duty cycle in the tool, then inspect thermal load and current utilization.
Outcome: If thermal load crosses the review line, derate current or select a longer stack/larger frame.
Questions are grouped by the decisions users usually need to make after finding a 17HS datasheet.
Source quality is uneven for 17HS pages, so mirrors and marketplace rows are treated as screening evidence, not final procurement approval.
| ID | Source | Key data | Why it matters | Checked on | Link |
|---|---|---|---|---|---|
| S1 | SERP snapshot: "17hs stepper motor datasheet" | Top result patterns include model-specific PDFs, distributor pages, and data mirrors rather than a single canonical 17HS standard sheet. | Validates a hybrid page: users need an immediate sheet checker and a report explaining field interpretation and source risk. | 2026-06-06 | Open source |
| S2 | SY Motor 17HS4401N product data | Public 17HS4401N data lists 1.8 degree, 40 N.cm, 1.7 A, 2.55 V, and 2.8 mH inductance for a 42 x 42 x 40 mm class motor. | Provides a concrete 17HS example for the tool default and shows which datasheet fields must be copied exactly. | 2026-06-06 | Open source |
| S3 | HandsOnTec 17HS4401S PDF | Public PDF presents a 17HS4401S 1.7 A, 43 N.cm class 4-wire bipolar motor sheet. | Confirms that close model suffixes can publish slightly different torque labels, so suffix-level matching matters. | 2026-06-06 | Open source |
| S4 | Direnc 17HS series PDF mirror | Public 17HS series table includes model rows for length, current, resistance, inductance, holding torque, and lead-wire count. | Supports the comparison approach: one 17HS family spans multiple electrical and torque configurations. | 2026-06-06 | Open source |
| S5 | OYO Stepper 17HS4401 product data | Public listing shows a 17HS4401 variant at 45 N.cm, 1.68 A, 3.27 V, 1.95 ohm, and 4.4 mH. | Demonstrates that the same visible 17HS4401 label can differ by winding and supplier. | 2026-06-06 | Open source |
| S6 | Oriental Motor speed-torque curve reference | Holding torque is a standstill value at rated current; pull-out torque and speed-torque curves define running limits. | Prevents treating the 17HS datasheet holding torque as guaranteed high-speed torque. | 2026-06-06 | Open source |
| S7 | Texas Instruments DRV8825 Datasheet | DRV8825 lists an 8.2 V to 45 V operating supply range and 1.9 us minimum STEP high/low timing. | Adds driver timing and voltage boundaries when a 17HS sheet is used with DRV8825-class boards. | 2026-06-06 | Open source |
| S8 | Allegro A4988 Datasheet | A4988 lists an 8 V to 35 V motor supply range and 1 us minimum STEP high/low timing. | Separates A4988 assumptions from DRV8825/TMC-class assumptions in 17HS wiring guides. | 2026-06-06 | Open source |
| S9 | ADI TMC2209 Datasheet Rev. 1.09 | TMC2209-class drivers publish a different voltage range, RMS/peak current framing, and STEP timing than A4988/DRV8825 families. | Prevents copy-pasting 17HS current and timing settings between driver families. | 2026-06-06 | Open source |
| S10 | STEPPERONLINE NEMA 17 product family index | Public NEMA 17 catalog rows span different stack lengths, step angles, holding torque values, and current ratings within the same 42 mm frame class. | Supports the anti-duplication angle: this page is model-sheet interpretation, not a generic NEMA 17 selector. | 2026-06-06 | Open source |
| S11 | NEMA ICS 16-2001 official publication page | NEMA lists ICS 16-2001 as an active 185-page standard covering rotational electric servo and stepper motors, power requirements, feedback devices, and controls for motion/position systems. | Sets the standards boundary: NEMA frame context helps mounting compatibility, but it is not a substitute for a model-level 17HS electrical datasheet. | 2026-06-06 | Open source |
| S12 | ASPINA NEMA17 selection guide | Explains that NEMA17 is about a 1.7 inch / 42 mm square flange and that NEMA size does not define torque, current, or other performance values. | Provides a manufacturer-side boundary for rejecting frame-size-only substitutions. | 2026-06-06 | Open source |
| S13 | Pololu A4988 carrier current limiting documentation | Documents that full-step coil current is about 70% of the current limit and that higher motor supply voltage requires active current limiting. | Turns a 17HS rated-current field into a board-level VREF/current-setting risk instead of a blind copy from the motor sheet. | 2026-06-06 | Open source |
| S14 | European Commission RoHS Directive page | RoHS Directive 2011/65/EU governs restricted substances in electrical and electronic equipment placed on the EU market. | Clarifies that a bare 17HS datasheet row is not enough for EU-market compliance evidence. | 2026-06-06 | Open source |
| S15 | ECHA REACH Article 33 communication guidance | Suppliers of articles containing Candidate List substances above 0.1% w/w must provide safe-use information to recipients; ECHA also describes SCIP obligations for SVHCs above 0.1% w/w in EU-market articles. | Adds a concrete compliance-data request for motors, cable insulation, connectors, labels, and packaging used in regulated supply chains. | 2026-06-06 | Open source |
| S16 | STEPPERONLINE 17HS19-2004S1 product data | A public 17HS19-2004S1 row lists a 42 x 42 x 48 mm 4-wire NEMA 17 motor at 59 N.cm and 2 A, with a downloadable full datasheet. | Shows that longer-stack 17HS variants can sit well outside the 40 N.cm / 1.7 A defaults and should not be collapsed into one 17HS4401-class assumption. | 2026-06-06 | Open source |
Disclosure
This page is an engineering pre-screen and sourcing decision aid, not a guarantee of motor reliability, regulatory compliance, or safe operation. Validate every candidate on the exact mechanism, enclosure, driver, firmware, cable, and duty cycle.
Evidence register size: 16 sources · Published: 2026-06-06 · Last updated: 2026-06-06 · Review every 6 months or when 17HS supplier sheets, driver limits, or sourcing requirements change.
Canonical URL: https://nema17motor.com/best/17hs-stepper-motor-datasheet
