Removing a bearing from an already detached, stably supported shaft using a manufacturer-permitted manual screw-type external puller with verified gripping surfaces and shaft-end support.
Do not load an uncertain grip or support. Stop for jaw slip, deformation, cracking, off-center movement or sharply rising resistance; control and release remaining load by the specified method before inspection.
Reference content written and revised with AI. It has not been verified or approved by a professional. Review by a suitably qualified professional and site approval are required before use.
1. Legal and technical scope
OSHA 1910.242(a) requires safe tool condition in general industry. Apply task-appropriate eye and hand protection and the relevant energy-control procedure for any preceding machine disassembly. This task begins with an already detached shaft; it does not establish that earlier isolation was completed. Construction work uses the applicable Part 1926 tool requirements.
Determine Federal OSHA or the applicable OSHA-approved State Plan, including public/private employer coverage. State Plans must be at least as effective and can impose different or additional requirements. The actual activity determines construction versus general-industry scope. Manufacturer instructions, consensus standards, project design and site approvals have distinct roles; this page is not a finding of nationwide compliance.
| Basis | Application and limits |
|---|---|
| OSHA 1910.242 | Safe condition of employee-used tools. |
| CCOHS Hand Tools - Gear Pullers | Canadian technical reference for alignment, tool condition and deformation stops. Its striking example is not adopted for this manual-only scope; actual manufacturer instructions govern. |
2. Scope and required inputs
Included: Removing a bearing from an already detached, stably supported shaft using a manufacturer-permitted manual screw-type external puller with verified gripping surfaces and shaft-end support.
Separate review: Hydraulic pulling, heating, cutting, impact driving, blind internal pullers, installed shafts, spring-loaded assemblies and modified jaws require separate assessment.
| Input | Required evidence |
|---|---|
| Identify parts and restraints | Part IDs and fit; Rings nuts and shoulders; Removal method basis; Drawing and condition |
| Inspect puller | Model and rated limits; Jaws screw and links; Lubrication instructions; Configuration and reach |
| Apply manual force | Force and displacement trend; Jaw and screw position; Support movement; Permitted drive method |
| Inspect and transfer | Shaft and bearing inspection; Reuse or rejection status; Puller condition record; Receiving maintainer |
Identify shaft and bearing fit, retaining rings and nuts, gripping surface, puller model, rating, reach and permitted jaw arrangement. Obtain lubrication, shaft-tip protection, hand-tool and unloading instructions. Plan independent support for the freed bearing and puller and appropriate fragment protection; no added pipe or impact tool is authorized.
3. Eight-stage JSA
P = likelihood; S = severity; R = risk under the site method; A = acceptance or authorization as defined by the site. Leave these blank until actual assessment and control verification. A low score does not override a legal requirement, product limit or unreleased hold point.
| Job stage | Hazards and effects | Failure factors | Required controls | Site verification | P | S | R | A |
|---|---|---|---|---|---|---|---|---|
| 1. Identify parts and restraints | 1. Retainer fracture2. Sudden bearing release3. Wrong fit removal4. Shaft damage | 1. Ring or nut overlooked2. Assembly history unclear3. Fit type assumed4. Drawing revision wrong | 1. Confirm bearing and shaft2. Locate retaining parts3. Review specified removal4. Match current drawing | 1. Part IDs and fit2. Rings nuts and shoulders3. Removal method basis4. Drawing and condition | ||||
| 2. Support and shield | 1. Shaft roll or drop2. Projected-part strike3. Bearing fall4. Bystander injury | 1. Support cannot resist force2. Release path exposed3. Catch support missing4. Access uncontrolled | 1. Secure shaft on stable support2. Provide specified shielding3. Support released parts4. Separate pulling zone | 1. Shaft and support stability2. Release path and protection3. Bearing and tool support4. People clear of line of force | ||||
| 3. Inspect puller | 1. Jaw fracture2. Screw seizure3. Unbalanced pull4. Unexpected grip loss | 1. Cracks or wear retained2. Lubrication omitted3. Wrong jaw combination4. Reach or rating unsuitable | 1. Inspect all load-bearing parts2. Use specified lubrication3. Match permitted configuration4. Verify rating and reach | 1. Model and rated limits2. Jaws screw and links3. Lubrication instructions4. Configuration and reach | ||||
| 4. Set grip and alignment | 1. Jaw slip2. Shaft-end damage3. Off-axis release4. Weak-edge failure | 1. Unequal engagement2. Wrong screw-tip support3. Screw not centered4. Cover used as grip | 1. Seat jaws on specified face2. Protect shaft end correctly3. Align screw with shaft4. Check load-bearing surface | 1. Jaw contact and retention2. Screw and shaft center3. Tip and end condition4. Grip surface suitability | ||||
| 5. Apply manual force | 1. Part projection2. Jaw deformation3. Tool overload4. Support displacement | 1. Impact tool added2. Pipe extension used3. Resistance ignored4. Force path shifts | 1. Use permitted hand tool2. Apply controlled force3. Observe alignment changes4. Stop on abnormal resistance | 1. Force and displacement trend2. Jaw and screw position3. Support movement4. Permitted drive method | ||||
| 6. Recover released bearing | 1. Dropped bearing2. Residual-force release3. Pinched hands4. Puller fall | 1. Support absent at release2. Tool loosened under load3. Part caught by hand4. Tool not restrained | 1. Maintain receiving support2. Unload in specified sequence3. Keep hands clear of release4. Recover parts after unloading | 1. Bearing supported2. Residual loading controlled3. Tool stable for removal4. Safe retrieval position | ||||
| 7. Hold stuck assembly | 1. Puller rupture2. Fragment injury3. Heat-weakened tool4. Damaged shaft reuse | 1. Deformed jaw reloaded2. Hammering added3. Puller heated4. Damage not assessed | 1. Stop and control approach2. Use approved unloading3. Review alternative removal4. Inspect affected parts | 1. Stuck position and symptoms2. Unloading and restraint state3. Damage and method review4. Authorized restart basis | ||||
| 8. Inspect and transfer | 1. Sharp-edge cuts2. Unfit bearing reuse3. Defective puller reuse4. Lost part identity | 1. Damage handling uncontrolled2. Removal equals acceptance3. Tool returned unmarked4. Parts mixed in storage | 1. Handle damaged edges safely2. Assess parts separately3. Tag defective puller4. Transfer IDs and restrictions | 1. Shaft and bearing inspection2. Reuse or rejection status3. Puller condition record4. Receiving maintainer |
4. Hypothetical scenario and failure mechanisms
Retained source illustration: an AI-generated educational concept, not a real incident photograph or evidence of equipment suitability.The following scenario, comparisons and example records are hypothetical teaching material. They do not reproduce actual incidents, measurements, signatures or approvals.
| Item | Hypothetical situation |
|---|---|
| Initial state | A manual puller is loaded against a bearing on a removed shaft. |
| Change | The bearing remains stationary while one jaw tilts outward. |
| Failure path | The operator proposes a long pipe on the wrench to increase force. |
| Possible harm | An unstable grip or overloaded jaw can release stored force and project parts. |
| Barrier | Stop loading, control access and unload by the approved method; inspect restraints, grip, alignment and damage before selecting a reviewed removal method. |
The grip must transmit force through a surface capable of carrying the removal load. A sufficient nominal puller rating cannot make a thin cover or damaged edge into an acceptable jaw seat. Trace the load path through the bearing fit, jaws, screw and supported shaft.
A shaft must remain stable against rolling and displacement while force rises. The released bearing and tool also need support when resistance suddenly disappears. Do not place hands in the release path to catch them.
Alignment changes are warning signs, not reasons to apply more leverage. Record the point at which movement stopped and the observed jaw position; release residual loading before touching or repositioning the assembly.
Successful removal and permission to reuse the bearing or shaft are different decisions. Record the force path, damage and inspection outcome, and identify defective puller parts so they cannot return unnoticed to service.
| Decision | Reason and evidence |
|---|---|
| Known facts | The bearing remains stationary while one jaw tilts outward. |
| Unresolved | The operator proposes a long pipe on the wrench to increase force. |
| Hold reason | Do not load an uncertain grip or support. Stop for jaw slip, deformation, cracking, off-center movement or sharply rising resistance; control and release remaining load by the specified method before inspection. |
| Evidence needed | Force and displacement trend; Jaw and screw position; Support movement; Permitted drive method. |
| Next decision | Stop loading, control access and unload by the approved method; inspect restraints, grip, alignment and damage before selecting a reviewed removal method. |
5. Conditional decisions and common errors
| Condition | Action | Evidence | Proceed when |
|---|---|---|---|
| Grip uncertain | Do not apply force. | Jaw face and shaft alignment. | Grip accepted. |
| Jaw changes shape | Stop and control residual loading. | Deformation and unloading record. | Tool replaced or accepted. |
| Bearing stuck | Hold added leverage or heat. | Fit, retainers and removal review. | Revised method authorized. |
| Bearing removed | Inspect parts before reuse. | Shaft and bearing disposition. | Reuse criteria met. |
| Comparison | Situation A | Situation B |
|---|---|---|
| Puller rated adequately | Grip, reach, alignment and support also suit the assembly. | Nominal rating substitutes for a secure gripping surface. |
| Bearing removed | Parts receive their required condition assessment. | Removal is treated as automatic reuse approval. |
6. Roles and responsibilities
| Role | Responsibility |
|---|---|
| Work supervisor | Confirm scope, task sequence, exclusion and stop authority. Coordinate identify parts and restraints with affected operations. |
| Technical reviewer | Resolve the actual design and equipment limits: Part IDs and fit; Rings nuts and shoulders; Removal method basis; Drawing and condition. |
| Work crew | Perform inspect puller using the approved procedure; report any mismatch before proceeding. |
| Inspector / assessor | Verify Bearing supported; Residual loading controlled; Tool stable for removal; Safe retrieval position. Record what was actually checked and what remains unresolved. |
| Release / receiving authority | Confirm Shaft and bearing inspection; Reuse or rejection status; Puller condition record; Receiving maintainer. Transfer restrictions and the next permitted stage. |
These are responsibility examples, not invented statutory credentials. Meet the actual training, competent-person, qualified-person and licensing requirements for the assigned work. Anyone may raise a hazard and request a stop; only the designated authority may release the affected stage after evidence is reviewed.
7. Hold points and record comparison
| Hold point | Evidence before release | Confirmation / approval |
|---|---|---|
| HP-0 Start | Scope, jurisdiction, equipment identity, responsible people and emergency arrangements. | |
| HP-1 Support and shield | Shaft and support stability; Release path and protection; Bearing and tool support; People clear of line of force | |
| HP-2 Set grip and alignment | Jaw contact and retention; Screw and shaft center; Tip and end condition; Grip surface suitability | |
| HP-3 Hold stuck assembly | Stuck position and symptoms; Unloading and restraint state; Damage and method review; Authorized restart basis | |
| HP-4 Inspect and transfer | Shaft and bearing inspection; Reuse or rejection status; Puller condition record; Receiving maintainer |
Hold points are internal evidence gates. They do not replace statutory permits or actual signatures. Recheck affected gates after a change, abnormal event or shift transfer. The blank record must identify the evidence, person, time, limits and release scope.
| Record | Insufficient record | Record checklist |
|---|---|---|
| Parts | Bearing identified | □ Part IDs and fit□ Rings nuts and shoulders□ Removal method basis□ Drawing and condition |
| Tool | Rating sufficient | □ Model and rated limits□ Jaws screw and links□ Lubrication instructions□ Configuration and reach |
| Loading | Still turning | □ Force and displacement trend□ Jaw and screw position□ Support movement□ Permitted drive method |
| Recovery | Bearing removed | □ Shaft and bearing inspection□ Reuse or rejection status□ Puller condition record□ Receiving maintainer |
The □ boxes are static prompts, not saved or interactive approvals. Each checks one record element. A tick alone does not establish suitability or permission to restart. Link equipment IDs and supporting records; retain unresolved matters and the earlier record when conditions change.
8. Site checklist and emergency response
| Check item | Result | Person / action |
|---|---|---|
| Part IDs and fit | ||
| Shaft and support stability | ||
| Model and rated limits | ||
| Jaw contact and retention | ||
| Force and displacement trend | ||
| Bearing supported | ||
| Stuck position and symptoms | ||
| Shaft and bearing inspection | ||
| Emergency arrangements and unresolved restrictions communicated |
Stop work: Do not load an uncertain grip or support. Stop for jaw slip, deformation, cracking, off-center movement or sharply rising resistance; control and release remaining load by the specified method before inspection.
Emergency response: Leave the line of force for cracking, deformation or sudden displacement. Control access and do not strike or dismantle a loaded puller. Obtain qualified assistance for safe unloading; call 911 for serious injury and keep damaged parts isolated for investigation.
9. Sources and review limits
Official-source review date: October 14, 2026. The following review is limited to the public provisions or selected manufacturer material identified below. It does not establish that any authority approved this article or the actual installation.
- OSHA 1910.242: Safe condition of employee-used tools.
- CCOHS Hand Tools - Gear Pullers: Canadian technical reference for alignment, tool condition and deformation stops. Its striking example is not adopted for this manual-only scope; actual manufacturer instructions govern.
- OSHA State Plans: jurisdiction and coverage overview; identify the actual state program before use.
Paid consensus standards and site-specific calculations, manuals, inspection records and product certificates were not independently obtained or verified unless specifically identified. Korean legal citations remain in the preserved Korean source as source history; they are not represented as US legal duties.
10. PDF guidance and FAQ
PDF A covers basic task controls; B examines technical failures; C focuses on supervision, evidence and handover. Each has six rows and three items per main cell. They are complementary extracts: apply all eight body stages and the applicable site procedure. An omitted stage is not permission to omit its controls. PDF HP-0 through HP-4 are worksheet labels; match the event, evidence and authority rather than assuming they match another permit by number.
P/S/R/A, actual measurements, confirmations and signatures remain blank. The PDFs are uncompleted reference worksheets, not issued work permits.
Content group ID: jsa-mechanical-bearing-puller
Can a pipe extension free a stuck bearing?
Do not add unapproved leverage. Stop and reassess restraints, fit, tool and alignment.
Is a protective blanket enough?
No. It supplements a suitable load path, stable support and controlled access.
May an impact wrench drive this puller?
This scope is manual screw operation only; do not change to impact or powered drive.
Does removal prove the bearing is reusable?
No. Apply the actual bearing and shaft inspection criteria separately.
Has a professional verified or approved this document?
No. This is AI-assisted reference material. Editorial and layout checks are not a physical inspection or professional technical approval. Obtain qualified professional review and required site approval before use.
11. Revision history and authorship
Reference content written and revised with AI. It has not been verified or approved by a professional. Review by a suitably qualified professional and site approval are required before use.
This system has not physically inspected the equipment, structures, ground, atmosphere or worksite. The document does not replace legal advice, manufacturer procedures, engineering design, inspection certificates, qualification evidence, the site risk assessment or an actual work permit.
Before use, a suitably qualified and authorized person must review the actual equipment, loads, methods, protection, inspection and emergency arrangements and resolve open issues. Record the real reviewer, organization, qualifications, delegated authority, reviewed documents, date, signature, exclusions and conditions of approval separately.
| Date | Version | Change | Review status |
|---|---|---|---|
| 2026-09-26 | 1.0 | Korean source revision retained in the source snapshot. | Historical editorial status; not US professional approval. |
| 2026-10-14 | US 1.0 | US localization of the assigned Korean source; task reasoning, educational image and history retained; US scope and sources reviewed. | AI-assisted editorial work; professional approval not performed. |