ROYAL POWER-BLOCK™ I.D. WORKHOLDING
For Milling Applications
Power-Block™ I.D. Workholding
  • The Royal Power-Block™ I.D. Workholding System enables secure gripping on the internal bore of a workpiece for full external machining access.
  • Pullback action draws workpiece securely against a ground locator for precise, consistent z-axis positioning.
  • Unit can be mounted to a traditional machining center table and can also be used in 4th and 5th-axis applications.
  • Fixture is designed to be actuated via hydraulic pressure and may also be actuated pneumatically for lighter-duty applications (contact us for details).
  • For use with all Royal precision mandrels, stops, and sleeves. These items are sold separately.
  • Heavy-duty all steel construction with a large double-acting piston provides high clamping force.
  • Configured with both side and bottom ports for plumbing flexibility.
  • Multiple units can be plumbed in series for single-source actuation.
  • Ideal for high-production applications on vertical, horizontal, and five-axis machining centers.
  • Tombstone and angle plate compatible.

How to Order:

  1. Choose the appropriate body assembly based upon your application.
  2. Choose the appropriate mandrel (models A-E) based upon the diameter you need to All mandrels and bodies share a common mounting interface for full interchangeability.
  3. If required, choose the appropriate part locator to provide a ground banking surface for the workpiece.
  4. Choose the appropriate expanding sleeve based upon the mandrel and diameter you need to grip.

Step 1 – Choose Body Assembly

POWER-BLOCK™ I.D. BODY – For Machining Centers

Proudly Made In USA
  • This body can be mounted to any machining center table, 4th/5th-axis rotary tables, angle plates, tombstones, etc.
  • Order mandrels, locators, and sleeves separately.

Note – dimensions shown without optional part locator. See mandrel chart for dimensions C, D, and E.

Royal Power-Block™ I.D. Assembly

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Description
PART
NUMBER
PRICE
Power-Block™ I.D. Body Assembly
47080
$2,980

Step 2 - Choose Mandrel

  • Choose appropriate mandrel model according to gripping range.
  • All Royal mandrels have a common precision ground interface for complete compatibility with all Royal I.D. body assemblies.
  • Order body assembly, locators, and sleeves separately.

Royal Mandrels

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Mandrel
Model
Gripping
Range
C
D
E
PART NUMBER
PRICE
A
0.479–0.640
1.57
0.57
0.87
47100
$1,420
B
0.620 –0.901
1.81
0.59
1.06
47101
$1,420
C
0.870 –1.151
2.05
0.61
1.26
47102
$1,420
D
1.120 –1.651
2.32
0.60
1.50
47103
$1,420
E
1.620 –3.276
2.52
0.58
1.69
47104
$1,420

Step 3 - Choose Part Locator

  • Optional part locator bolts to the front of the mandrel and provides a precision banking surface for the workpiece to locate against.
  • Order body assembly, mandrels, and sleeves separately.

Royal Part Locators

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Fits
Mandrel
Model
Width
Outer
Diameter
Part
Number
PRICE
A
0.47
1.57
$283
B
0.47
1.57
$283
C
0.47
2.95
$327
D
0.47
2.95
$327
E
0.47
2.95
$327

Step 4 - Choose Expanding Sleeve

  • Order expanding sleeves according to mandrel models A thru E.
  • All expanding sleeves are fully sealed against coolant and chip penetration.
  • Parallel grip ensures full-length part contact for optimum accuracy and grip force.
  • All sleeves collapse 0.005" below nominal ground size to ensure easy part loading and unloading.
  • Order body assembly, mandrels, and locators separately

Royal Expanding Sleeves - Model A

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Nominal Sleeve
Diameter
Gripping
Range
Part
Number
PRICE
31⁄64″
0.479 - 0.499
$395
1⁄2″
0.495 - 0.515
$395
33⁄64″
0.511 - 0.531
$395
17⁄32″
0.526 - 0.546
$395
35⁄64″
0.542 - 0.562
$395
9⁄16″
0.558 - 0.578
$395
39⁄64″
0.604 - 0.624
$395
19⁄32″
0.589 - 0.609
$395
41⁄64″
0.636 - 0.656
$395
5⁄8″
0.620 - 0.640
$395

Royal Expanding Sleeves - Model B

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Nominal Sleeve
Diameter
Gripping
Range
Part
Number
PRICE
5⁄8″
0.620 - 0.651
$437
21⁄32″
0.651 - 0.682
$437
11⁄16″
0.683 - 0.714
$437
23⁄32″
0.714 - 0.745
$437
3⁄4″
0.745 - 0.776
$437
25⁄32″
0.776 - 0.807
$437
13⁄16″
0.808 - 0.839
$437
27⁄32″
0.830 - 0.870
$437
7⁄8″
0.870 - 0.901
$437

Royal Expanding Sleeves - Model C

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Nominal Sleeve
Diameter
Gripping
Range
Part
Number
PRICE
7⁄8″
0.870 - 0.901
$437
29⁄32″
0.901 - 0.932
$437
15⁄16″
0.933 - 0.964
$437
31⁄32″
0.964 - 0.995
$437
1″
0.995 - 1.026
$437
1 1⁄32″
1.026 - 1.057
$437
1 1⁄16″
1.058 - 1.089
$437
1 3⁄32″
1.089 - 1.120
$437
1 1⁄8″
1.120 - 1.151
$437

Royal Expanding Sleeves - Model D

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Nominal Sleeve
Diameter
Gripping
Range
Part
Number
PRICE
1 1⁄8″
1.120 - 1.151
$470
1 5⁄32″
1.151 - 1.182
$470
1 3⁄16″
1.183 - 1.214
$470
1 7⁄32″
1.214 - 1.245
$470
1 1⁄4″
1.145 - 1.276
$470
1 9⁄32″
1.276 - 1.317
$470
1 5⁄16″
1.308 - 1.339
$470
1 11⁄32″
1.339 - 1.370
$470
1 3⁄8″
1.370 - 1.401
$470
1 13⁄32″
1.401 - 1.432
$470
1 7⁄16″
1.433 - 1.464
$470
1 15⁄32″
1.464 - 1.495
$470
1 1⁄2″
1.495 - 1.526
$470
1 17⁄32″
1.526 - 1.557
$470
1 9⁄16″
1.558 - 1.589
$470
1 19⁄32″
1.589 - 1.620
$470
1 5⁄8″
1.620 - 1.651
$470

Royal Expanding Sleeves - Model E

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Nominal Sleeve
Diameter
Gripping
Range
Part
Number
PRICE
1 5⁄8″
1.620 - 1.651
$572
1 21⁄32″
1.651 - 1.682
$572
1 11⁄16″
1.683 - 1.714
$572
1 23⁄32″
1.714 - 1.745
$572
1 3⁄4″
1.745 - 1.776
$572
1 25⁄32″
1.776 - 1.807
$572
1 13⁄16″
1.808 - 1.839
$572
1 27⁄32″
1.839 - 1.870
$572
1 7⁄8″
1.870 - 1.901
$572
1 29⁄32″
1.901 - 1.932
$572
1 15⁄16″
1.933 - 1.964
$572
1 31⁄32″
1.964 - 1.995
$572
2″
1.995 - 2.026
$572
2 1⁄32″
2.026 - 2.057
$572
2 1⁄16″
2.058 - 2.089
$572
2 3⁄32″
2.089 - 2.120
$572
2 1⁄8″
2.120 - 2.151
$572
2 5⁄32″
2.151 - 2.182
$572
2 3⁄16″
2.183 - 2.214
$572
2 7⁄32″
2.214 - 2.245
$572
2 1⁄4″
2.245 - 2.276
$572
2 9⁄32″
2.276 - 2.307
$572
2 5⁄16″
2.308 - 2.339
$572
2 11⁄32″
2.339 - 2.370
$572
2 3⁄8″
2.370 - 2.401
$572
2 13⁄32″
2.401 - 2.432
$572
2 7⁄16″
2.433 - 2.464
$572
2 15⁄32″
2.464 - 2.495
$572
2 1⁄2″
2.495 - 2.526
$572
2 17⁄32″
2.526 - 2.557
$649
2 9⁄16″
2.558 - 2.589
$649
2 19⁄32″
2.589 - 2.620
$649
2 5⁄8″
2.620 - 2.651
$649
2 21⁄32″
2.651 - 2.682
$649
2 11⁄16″
2.683 - 2.714
$649
2 23⁄32″
2.714 - 2.745
$649
2 3⁄4″
2.745 - 2.776
$649
2 25⁄32″
2.776 - 2.807
$649
2 13⁄16″
2.808 - 2.839
$649
2 27⁄32″
2.839 - 2.870
$649
2 7⁄8″
2.870 - 2.901
$649
2 29⁄32″
2.901 - 2.932
$649
2 15⁄16″
2.933 - 2.964
$649
2 31⁄32″
2.964 - 2.995
$649
3″
2.995 - 3.026
$649
3 1⁄32″
3.026 - 3.057
$649
3 1⁄16″
3.058 - 3.089
$649
3 3⁄32″
3.089 - 3.120
$649
3 1⁄8″
3.120 - 3.151
$649
3 5⁄32″
3.151 - 3.182
$649
3 3⁄16″
3.183 - 3.214
$649
3 7⁄32″
3.214 - 3.245
$649
3 1⁄4″
3.245 - 3.276
$649