Does a “Bosch Audited SDS-Plus” mark certify the whole drill bit?

The mark alone does not state the audited site, model, production period or test scope. Ask the party making the claim for authorization and a document naming the covered product and process. Assess shank fit, head joining, materials and drilling performance under separate acceptance criteria.

Does the mark prove Bosch-branded drilling performance?

No performance equivalence follows from a stamp. Use the approved bit drawing, material and joining records, plus witnessed drilling in the target substrate on the specified hammer to compare hole diameter, rate and wear.

What reference should define SDS-Plus shank fit?

Use the machine maker’s approved SDS-Plus interface drawing or an agreed customer drawing, together with go/no-go gauges and a representative chuck. SDS-Plus commonly has a nominal 10 mm shank with two open drive grooves and two closed locking grooves. ISO 6480:2019 is a broaching-machine accuracy standard, not an SDS connection standard; DIN 8035 must not be substituted as a shank drawing without a verified source.

Why must shank geometry and hardness be checked?

The bit must enter, lock, float axially and release as the tool holder is designed to allow. Check shank diameter and groove positions on the approved drawing, groove surface condition and hardness, and runout of the assembled bit. A poor fit can wear the chuck, bind the bit or change hole quality; a fixed percentage loss cannot be inferred from shank dimensions alone.

Is a supplier audit the same as PGM product certification?

These are different kinds of evidence. A customer or supplier audit concerns a stated facility, process and time period. A PGM claim must be checked against the specific authorized product and program scope. Neither claim replaces the other or the buyer’s sample and batch acceptance plan.

'Bosch Audited SDS-Plus' on Chinese Drill Bits: What the Red Stamp Actually Means

Key Specification / Takeaways

01. ISO 6480:2019 concerns horizontal internal broaching machines. It does not define SDS-Plus or SDS-Max shank geometry; do not put it on an SDS drawing, inspection report or product claim.
02. For shank fit, obtain the approved machine-interface drawing and check the actual bit with go/no-go gauges and a representative tool holder. A 10 mm SDS-Plus shank and an 18 mm SDS-Max shank are different systems.
03. A “Bosch Audited” stamp alone does not identify the holder, factory, approved product, date or audit scope. Request the underlying authorization and product-specific evidence before relying on the mark.
04. Record the measured shank lands, groove geometry, insertion and release, hardness and assembled-bit runout by lot. Head construction and drilling performance need their own acceptance checks.
05. For an OEM RFQ, provide the target hammer, bit diameter and length, signed interface drawing, sample fit requirement and batch inspection plan. Zhonghuan can match the shank and head to that agreed specification.

Which reference defines SDS shank fit?

A standard number must point to the right document. ISO 6480:2019 covers accuracy tests for horizontal internal broaching machines; it does not specify an SDS drill-bit shank. A withdrawn DIN 8035 draft concerns carbide-tipped hammer drills, not a proven equivalent SDS connection drawing. Start with the hammer maker’s current interface document or the drawing signed for the OEM program. Keep the drawing revision on the purchase order and inspection sheet.

SDS-Plus: check the approved drawing

SDS-Plus uses a nominal 10 mm shank with open drive grooves and closed locking grooves. The drawing controls the dimensions and positions that make the bit engage, move axially and release correctly. Specify the gauge limits for each relevant feature and verify the bit in a representative chuck. Do not publish an h9 band, insertion depth or groove radius as universal unless it is present in the approved interface drawing.

SDS-Max is a different interface

SDS-Max uses a larger nominal 18 mm shank and a different groove system. It is not interchangeable with SDS-Plus. The nominal size is a platform description; the exact fit, insertion and locking geometry belong to the selected hammer and its approved drawing. Check the SDS-Max bit with its own gauges and chuck rather than copying SDS-Plus dimensions.

How to assess a “Bosch Audited” mark

When a seller presents a “Bosch Audited SDS-Plus” stamp, request the document behind the claim: issuing organization, company and site, product or process covered, date, validity, and permission to use the mark. The stamp itself does not establish that every current SKU or every batch has been inspected by Bosch. Buyers can evaluate the actual product through a signed specification and retained batch records.

What gauge and batch inspection should cover

An OEM inspection plan can record shank outside diameter and cylindrical lands, drive and locking groove geometry, burr condition, insertion and release in a master holder, local hardness where specified, and assembled-bit runout. Record sampling frequency and pass/fail limits against the approved drawing. Head carbide, body steel, joining quality and drilling life require separate evidence; passing a shank gauge does not validate them.

Why shank fit matters

An SDS bit transfers impact while moving in the holder. Groove position and surface condition affect drive, locking and ejection. Excess clearance can increase movement and wear; tight or damaged grooves can bind. Describe those risks through measured geometry and actual machine fit. Do not attach a universal drilling-rate or anchor-strength percentage to a shank tolerance without a controlled application test.

Failure modes buyers can inspect

Watch for mushroomed locking grooves, burrs at the drive lands, an out-of-round shank, incorrect groove spacing and excessive runout at the cutting head. If a bit sticks or the chuck behaves abnormally, stop using the combination and inspect both parts. Record the defect against the batch so machining or heat treatment can be corrected before the next release.

Supplier audit and PGM are separate claims

A customer audit, a supplier qualification mark and a product certification answer different questions. Check the scope and holder of each claim. If a contract requires PGM-marked masonry drill bits, confirm the specific authorized product and producer through the relevant program documents. A Bosch-related supplier statement does not substitute for a PGM claim, and a PGM mark does not prove Bosch supplier status.

RFQ checklist for a documented shank

Send the hammer model, shank system, drill diameter and working length, target substrate, required interface drawing and expected order volume. Ask for a signed sample, gauge plan, batch traceability, material and joining records, and a test on the intended machine. Zhonghuan will propose the head and shank configuration for engineering review and sample approval; the agreed drawing and acceptance sheet control repeat orders.

Related Procurement Programs

If you are sourcing this product line for a distributor, importer, or private-label channel, these OEM and wholesale programs cover the procurement questions buyers usually ask next.

SDS Drill Bits Manufacturer & Wholesale Supply for Distributors — OEM and wholesale SDS drill bit supply for importers, distributors, and tool brands.
SDS-Plus Drill Bits for Anchor Bolt Installation in Concrete — Precision SDS-Plus hammer drill bits for mechanical and chemical anchor holes.
SDS Plus Drill Bit Sets Private Label & OEM Packaging — Private-label SDS Plus drill bit set program for retailers, importers, and online tool brands.