Catalog reference image. Final configuration is confirmed in the quotation.
BT30 / BT40 / BT50
BT ER collet chucks for BT30, BT40 and BT50 connections. Compare the listed ER25, ER32 and ER40 combinations, L1 length options and required accessories.
FuRui supplies BT ER collet chucks for BT30, BT40 and BT50 machine spindles. Each holder uses a separate ER collet to grip the tool shank. The ordering code identifies three choices: BT connection, ER series and the listed L1 length. Use the table below to select a listed combination, then specify the collet bores and accessories for your order.
For a confirmed BT30 spindle, the catalog lists ER25 with L1 = 70 or 135 mm, ER32 with L1 = 70 or 100 mm, and ER40 with L1 = 80 mm. All three BT30 rows show D = 31.75 mm; D1 is 42, 50 and 63 mm respectively. Select the ER family and listed length together, then confirm the machine retention details. BT40 and BT50 have separate rows.
The BT40-ER32 row lists 70, 100 and 150 mm. A 125 mm option appears in the BT40-ER25 row, not the BT40-ER32 row.
List the holder code, each collet bore and quantity separately. Identify the machine's pull-stud requirement and ask which accessories the quotation includes.
A BT30 spindle connection does not select the ER collet family. The three BT30 rows have different L1 choices and front dimensions D1. Start with the machine-approved BT30 connection, then compare the tool-shank bore, clearance and required reach.
| Holder family | L1 choices | D1 | D |
|---|---|---|---|
| BT30-ER25 | 70 / 135 | 42 | 31.75 |
| BT30-ER32 | 70 / 100 | 50 | 31.75 |
| BT30-ER40 | 80 | 63 | 31.75 |
For BT30-ER32-100, the catalog lists L1 = 100 mm, D1 = 50 mm and D = 31.75 mm. The 135 mm L1 option belongs to BT30-ER25, not BT30-ER32. ER32 is the collet series, not a 32 mm tool bore; select the individual collet for the actual tool shank.
Request a BT30 ER32 drawing and quotation. State one L1 option, each tool-shank diameter, quantities and the machine pull-stud requirement. Confirm the included nut, collets and wrench separately. The dimension table does not specify a speed, balance grade or runout limit.
BT40 identifies the spindle interface and ER32 the collet family. The catalog lists three L1 options for this combination. Choose the required reach, then specify the separate collet bores and machine pull stud.
| Requested model | L1 | D1 / D | Quotation |
|---|---|---|---|
| BT40-ER32-70 | 70 | 50 / 44.45 | Request L1 70 mm |
| BT40-ER32-100 | 100 | 50 / 44.45 | Request L1 100 mm |
| BT40-ER32-150 | 150 | 50 / 44.45 | Request L1 150 mm |
Each link fills in one requested length and a checklist for collets, accessories, inspection and delivery. D and D1 follow the catalog drawing. These dimensions do not specify a runout limit or speed rating.
Open an email checklist for BT40-ER32-100 to attach a machine drawing or pull-stud reference. Change the selected length if needed; your email app opens with the product reference included.
Both rows use ER32 collets, but the machine connections are different. Select the BT interface required by the spindle before choosing a length.
| Catalog dimension | BT40 ER32 | BT50 ER32 |
|---|---|---|
| L1 choices | 70 / 100 / 150 | 80 / 100 / 120 / 150 / 200 |
| D | 44.45 | 69.85 |
| D1 | 50 | 50 |
D, D1 and L1 retain the designations in the catalog drawing. A common ER32 connection or D1 value does not make the two holders interchangeable. Check the drawing reference points and available machine clearance.
Request the BT50 ER32 drawing and quotation. Specify one L1 choice, each tool-shank diameter and quantity. For BT40, use the inquiry link above or its row in the full specification table.
The BT50-ER40 row lists L1 = 80, 100, 120, 135 and 150 mm, with D1 = 63 mm and D = 69.85 mm. Do not carry the 200 mm option over from the ER32 row: a BT50 ER40 request for that length needs separate drawing and quotation confirmation.
Specify ER40 collets for the ER40 holder, even when an ER32 collet can hold the same nominal tool-shank diameter. Request a BT50 ER40 drawing and quotation with your chosen L1, individual collet bores and quantities.
For a 10 mm round-shank tool in an ER32 holder, specify the ER32 collet for that shank as well as the holder code. ER32 identifies a collet family, not a 32 mm tool bore. Confirm the nut, collet and machine-specific pull stud required in the supplied package.
Compare ER collet series and bore selection, or check the BT, NT, R8 and MT selection guide if the machine connection is uncertain.
If runout is a purchasing requirement, ask whether the quoted limit covers the holder alone or the assembled holder, nut and collet. Specify the test-pin diameter, measurement distance and reference face, maximum TIR with units, and required inspection record. Use the ER assembly runout quotation checklist to record these conditions. The dimensional table below does not establish a guaranteed runout value.
These BT holders use ER25, ER32 or ER40 collets according to the selected model. A matching tool-shank diameter alone does not confirm that a collet fits the holder and nut. Check the series marked on the holder before ordering. If your existing equipment uses a different system, compare the SK collet range and its ordering requirements, then send the holder and collet references for a compatibility check.
Download the BT ER holder and ER collet selection reference (PDF, 2 pages)
Includes all nine catalog holder rows, ER series bore coverage and a BT40-ER32-100 ordering example. Use it to shortlist a model; confirm the final drawing and supplied accessories with the quotation.
Dimensions are in millimeters unless otherwise stated. Confirm the final drawing before ordering.
Select an underlined catalog reference to include that row in your inquiry.
| Ordering code | L1 | D1 | D |
|---|---|---|---|
| BT30-ER25-70/135 | 70/135 | 42 | 31.75 |
| BT30-ER32-70/100 | 70/100 | 50 | 31.75 |
| BT30-ER40-80 | 80 | 63 | 31.75 |
| BT40-ER25-70/100/125/150 | 70/100/125/150 | 42 | 44.45 |
| BT40-ER32-70/100/150 | 70/100/150 | 50 | 44.45 |
| BT40-ER40-80/100/120/150 | 80/100/120/150 | 63 | 44.45 |
| BT50-ER25-70/105/135/165 | 70/105/135/165 | 42 | 69.85 |
| BT50-ER32-80/100/120/150/200 | 80/100/120/150/200 | 50 | 69.85 |
| BT50-ER40-80/100/120/135/150 | 80/100/120/135/150 | 63 | 69.85 |
No matching model in this table. Try a shorter code, or send your required size or drawing.
Ranges and slash-separated values describe catalog families, not every possible combination. Confirm the complete model and drawing before ordering.
Typical selection contexts for this series, not customer project claims. Confirm machine compatibility and cutting conditions for your setup.
Organizing milling and drilling holders around a confirmed BT spindle interface.
Comparing available lengths where clamps or workpiece geometry limit tool access.
Using one ER size across multiple holders with separately selected collet bores.
Specify the dimensions, tolerances and records your order requires. Acceptance criteria must be agreed for the selected model.
Check the drawing reference faces and units. A catalog size alone does not define a tolerance or an inspection method.
List any required dimensional report, material document or model identification photograph in your inquiry. Confirm availability and scope in the quotation.
For a drawing-based part, include the drawing revision and identify the critical dimensions. Website photographs are not inspection reports.
Agree the packing method and photo requirements when confirming your order.
No verified shipment photographs for this series are currently published. Include selected-model, protective-packing and outer-label photos in your order requirements.
Discuss packing requirementsUse this checklist to agree what should be documented for your selected model.
Stock, dispatch date and shipping method are confirmed with the quotation. Website images are not live inventory evidence.
Keep a copy of the current series information for comparison. Confirm the final model and drawing before placing an order.
View specificationsRead interface names and ordering codes before choosing a holder.
Read the guideBrowse the existing tooling guides and compare product families before selecting a model.
Browse technical resourcesCompare alternative interfaces and complementary tooling. A related series is not automatically interchangeable.
BT-SLB
BT-SPU
ER8-ER40
The BT50-ER32 row lists L1 = 80, 100, 120, 150 and 200 mm, with D1 = 50 mm and D = 69.85 mm. Select the required length and ER32 collet bore separately. These are BT50 options; BT30 and BT40 have their own rows and are not interchangeable spindle connections. Other lengths need a confirmed drawing and quotation.
Do not assume so. List the required collets and nut in the inquiry so the package contents can be confirmed.
No. The catalog data does not establish a speed or balance rating for this series.
This series holds the tool through an ER collet. The side-lock series uses a different clamping arrangement and needs separate selection.
