45 degree layout
Type A refers to the cutter arrangement stated in the source, not a tolerance class.
Catalog reference view. final supplied configuration confirmed by quotation.
BT-BSA
BT Type A 45 Degree Boring Holders
Overview
BT square-cutter rough boring holders with a 45 degree Type A arrangement.
AvailabilityConfirm before order
Lead timeQuote based
Product details
The BT Type A rough boring series uses a 45 degree square-cutter arrangement and is listed for BT40 and BT50 machines. The ordering families combine bar diameter, L1 options and a defined boring range. Check the intended hole geometry against the selected model rather than assuming all Type A holders share the same capacity.
Hole-range matching
Select the individual boring range corresponding to the required holder family.
Tool-access planning
Check bar diameter, reach and cutter position against the bore and nearby features.
Specifications & model range
Dimensions are in millimeters unless otherwise stated. Confirm the final drawing before ordering.
- Interface
- BT40, BT50
- Boring range
- 25-125 mm
- Style
- Type A, 45 degree
5 catalog rows
| Ordering family | L1 options | Bar d | Boring range d1 |
|---|---|---|---|
| BT40-BSA25/30/38/42/50 | 120/150/165 | 20/24/30/34/40 | 25-65 |
| BT40-BSA62/72/90 | 180 | 50/60/75 | 62-125 |
| BT50-BSA25/30/38/42 | 135/165/180/210 | 20/24/30/34 | 25-56 |
| BT50-BSA50/62 | 180/195/240/270 | 40/50 | 50-90 |
| BT50-BSA72/90 | 195/210/285/300 | 60/75 | 72-125 |
No matching model in this table. Try a shorter code or send us your drawing.
Ranges and slash-separated values describe catalog families, not every possible combination. Confirm the complete model and drawing before ordering.
Shipping photos & packing
Agree the packing method and photo requirements when confirming your order.
Order-specific photo confirmation
Verified dispatch photos for this series have not been uploaded. Request photographs of your selected model, protective packing and shipping label when confirming your order.
Discuss packing requirementsPhotos to confirm before dispatch
Use this checklist to agree what should be documented for your selected model.
- BSA designation clearly separated from BSB
- Bar end and cutter seat protected
- Clamping hardware checked against package list
Stock, dispatch date and shipping method are confirmed with the quotation. Website images are not live inventory evidence.
Application scenarios
Typical selection contexts for this series, not customer project claims. Confirm machine compatibility and cutting conditions for your setup.
Rough boring sequences
Enlarging preformed holes before the specified finishing process.
Cutter-layout alternatives
Comparing the Type A geometry with a Type B arrangement for a proposed setup.
Production hole preparation
Choosing a consistent holder code for repeated bore sizes on a BT machine.
Related product series
Compare alternative interfaces and complementary tooling. A related series is not automatically interchangeable.
BT-BSB
BT Type B 90 Degree Boring Holders
Models and specifications
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Models and specifications
BT-MTA
BT MTA Morse Taper Adapters
Models and specificationsDoes 45 degree describe a countersink cut?
The source uses it to identify the Type A boring holder arrangement. It should not be treated as a finished feature specification.
Can I use the family maximum for every holder?
No. Use the range in the specific ordering row and confirm the final drawing.
Are finish tolerance and surface roughness guaranteed here?
No such values are supplied in the catalog. State your finished-hole requirements for application review.
What helps choose between Type A and Type B?
Send the bore drawing, access constraints and cutter information so the two layouts can be compared.