How to Stock a Maintenance Crib from Scratch
Start with the parts your equipment actually needs. Give each stocked item one complete specification, one labeled location, a quantity based on use and replenishment time, and a person responsible for refill. Buy the containers after the parts and quantities are understood.
In this guide
Make a stock list from the last repair, not from an empty wall
Use recurring work, equipment records, and shortage history to decide what earns a location.
A maintenance crib is the shop's organized supply area. It can be a cabinet, a bin wall, or a room. Its first job is to make the right part findable and refillable.
Collect recent work orders, invoices, emergency buys, preventive-maintenance lists, and the technician's recurring requests. Start a candidate list with the exact item, where it is used, normal usage, replenishment time, and consequence of being without it. No reliable history yet? Record the estimate and review it after actual pulls.
| Candidate | Initial stocking decision | Evidence to collect |
|---|---|---|
| Frequently used, fully specified fastener | Give it an accessible labeled location | Complete size, grade, finish, use rate and companion hardware |
| Rare spare that can stop a machine | Assess a reserve even with little pull history | Asset, failure consequence, lead time and OEM requirement |
| Unidentified loose hardware | Hold for identification | Photos, measurements, old label and possible equipment origin |
| Project-only material | Stage against the project | Job quantity and owner; avoid confusing it with free stock |
| Controlled PPE, lifting or pressure component | Keep its required review and records | Responsible person's specification and storage/inspection rules |
Do not choose Grade 5, Grade 8, metric, or stainless merely because a starter assortment contains it. Stock the equipment requirement. A complete set includes the specified nuts and washers, not just the bolts.
Give the next person a label they can use
A label should identify the exact part and tell the reader what to do when it gets low.
EXAMPLE BIN LABEL · ILLUSTRATIVE
1/4-20 UNC × 1 inHex cap screw · SAE Grade 5 · specified zinc finish
- Location
- A-03
- Item
- Internal item ID
- Refill trigger
- 32 pieces
- Target
- 64 pieces*
- Owner
- Named buyer + backup
- Signal
- Place card in refill queue
Keep inch and metric stock separate. Within a fastener family, arrange diameters in one direction and lengths in the other. Separate grades, coatings, fine threads, and special items into clearly named zones. Color may reinforce a label, but the words must still work without color.
Place frequent pulls within comfortable reach and heavy stock low, within the storage equipment's rating. Keep companion parts nearby without mixing them. An empty location should keep its label so the missing part remains identifiable.
Example: a technician asks for “the longer quarter-inch bolt.” The label should let the buyer distinguish 1/4-20 × 1 in from 1/4-20 × 1-1/2 in, and distinguish both from 1/4-28. A bin labeled only “1/4 bolts” cannot do that job.
Choose quantities from time and use
Cover the demand that can occur before replacement stock is received and available, then add a deliberate buffer.
Use the whole response time: waiting for a count or route, internal approval, supplier delivery, and receiving. A two-week supplier lead time may still leave three weeks from an empty-bin signal to usable stock.
Illustration only: normal use is 8 pieces per week. A weekly review can add 1 week before ordering; delivery and receiving take 2 more weeks. Expected use during that window is 8 × (1 + 2) = 24 pieces. A separately chosen 8-piece buffer gives 32 pieces of planning coverage. A shutdown job or longer lead time changes the calculation.
Check supplier pack size, usable compartment volume, loaded weight, and safe reach before approving a quantity. “The calculation says 100” does not mean 100 fits this bin. Use a larger container, split reserve storage with a clear record, or change the refill plan.
Run the first month as a small working system
Name the person who sees the signal, the person who orders, and the person who closes the refill.
| When | Action | Record |
|---|---|---|
| Before filling | Resolve unknowns and agree item specifications | Approved item list and exception list |
| At setup | Label locations and record starting counts | Bin map, photo and starting quantity |
| During use | Capture unusual pulls, borrowing and project demand | Item, quantity, reason and date |
| At the agreed review | Check low stock and outstanding orders | Refill signal, order status and owner |
| After a useful trial period | Adjust quantities and locations from evidence | Stockouts, dead stock, lead-time changes and decisions |
Weekly checks may suit a new fast-moving wall, but a calendar alone does not provide coverage. A two-bin reserve must last until the response is complete. A critical low-use spare needs an asset and lead-time review even when nobody has pulled it recently.
Put unidentified returns in a separate, labeled review location. Mixing a similar-looking part into a known bin is an inventory error even when the count looks correct.
Send a starter-crib request that can be quoted
Send the candidate list and the gaps. A rough list with honest unknowns is usable.
Include the facility and equipment types, photos of current storage, item specifications or old package labels, quantities or recent usage, lead-time concerns, and the repairs causing emergency trips. Mark which quantities are measured and which are estimates.
Also identify who approves substitutions, who owns refill, and what records purchasing requires. A customer-approved consolidated PO reference can coexist with complete itemized supporting records. Do not remove line detail or bypass the customer's approval rules to make the wall easier to buy.
For mixed MRO supplies, add the task: material and machine for abrasives; fluid and temperature for lubricants; the site selection requirement for PPE. A bin plan organizes these decisions; it does not replace them.
Frequently Asked Questions
How many bins should we buy?
Count the distinct approved items and planned quantities first. Keep look-alikes separate, allow room for access and labels, and check loaded weight. There is no universal bin count for a new crib.
Should we stock rare parts?
Sometimes. A long-lead spare that stops an important machine can deserve stock despite low use. Tie the decision to an asset and responsible owner.
Who should own the refill?
Name one accountable owner and a backup. The technician, buyer and supplier may each perform a step, but the signal must have a visible status until stock is received.
Sources and Review Boundaries
Published by GO4FORGE. Revised 2026-10-29. Editorial method. These notes help narrow sourcing evidence and selection risk; they do not replace the responsible site authority, OEM procedure, code requirement, or qualified engineering/safety review.
- GO4FORGE product knowledge files Internal product-knowledge references distilled into public decision guides.
- GO4FORGE RFQ evidence model Shop-floor evidence patterns for quotes, substitutions, and sourcing review.
- GO4FORGE hardware replenishment knowledgebase Working and reserve stock, visible refill signals, and ownership.
- GO4FORGE companion-hardware and Durham storage knowledgebases Specification-led separation and physical capacity checks. Layouts and quantities below are illustrative.
Related Guides
Keep recurring parts within reach
A bin keeps running out? Tell us where it is and what goes in it. Ask FORGE about this topic.