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SEO Title:
API 8C YG Series Hook Blocks | 600–4500 kN

Meta Description:
API 8C YG Series hook blocks combine a traveling block and drilling hook, with 3–6 sheaves and maximum hook loads from 600 to 4,500 kN.

Keywords:
API 8C Hook Block, YG Series Hook Block, Traveling Block and Hook, Drilling Rig Hook Block, Integrated Hook Block

Focus Keyphrase:
API 8C Hook Block

Integrated Traveling Blocks and Drilling Hooks for Rig Hoisting

Goldenman YG Series Hook Blocks combine a traveling block and drilling hook into one integrated drilling-rig hoisting assembly.

Compared with a system using a separate traveling block and independent drilling hook, the integrated YG structure reduces the overall distance between the moving sheaves and main hook. This provides more usable traveling clearance inside the derrick or mast and makes the series particularly suitable for compact drilling rigs, workover rigs and installations with restricted vertical space.

The Goldenman YG Series includes:

YG60
YG90
YG110
YG135
YG170
YG225
YG350
YG450

Published maximum hook loads range from 600 to 4,500 kN, with available configurations using 3 to 6 sheaves.

Each model must be matched to the drilling rig, Crown Block, drilling-line diameter, reeving arrangement, Drawworks, swivel bail, Elevator Links, available mast clearance and maximum operating hook load.

Product Short Description

Goldenman API 8C YG Hook Blocks integrate the moving sheave assembly and Drilling Hook into a compact load-bearing unit for drilling, workover, tripping and casing-running operations.

Eight available models cover maximum hook loads from 600 to 4,500 kN. Model-specific configurations provide three to six sheaves, different main-hook openings and different spring-travel ranges.

The final sheave diameter, wire-rope diameter, overall dimensions, product weight and connection interfaces are confirmed through the approved model drawing before production.

Product Highlights

Manufactured to applicable API Standard 8C requirements
Integrated Traveling Block and Drilling Hook
YG60 through YG450 model range
Maximum hook loads from 600 to 4,500 kN
Three- to six-sheave configurations
Reduced traveling-equipment overall height
Suitable for drilling and workover rigs
Hardened sheave-groove surfaces
Individual sheave bearing and lubrication arrangement
Rope guards over the sheave system
Main-hook safety-retaining device
Controlled hook rotation and locking
Spring or cushioning travel
NDE of critical load-bearing components
Matching Crown Block and reeving design
PSL 1 or PSL 2 according to project requirements
Low-temperature material options
Proof-load and functional testing
Model-specific spare-parts packages

What Is a YG Hook Block?

A Hook Block combines two major parts of the rig hoisting system:

The Traveling Block
The Drilling Hook

The Traveling Block contains the moving sheaves through which the drilling line is reeved.

The Drilling Hook supports suspended equipment such as:

Drilling swivel
Power swivel
Kelly and drillstring
Elevator Links
Tubular elevators
Casing-running equipment
Approved workover handling tools

The complete load path can include:

Drillstring, casing string or tubing string
Elevator or drilling swivel
Elevator Links or swivel bail
YG Hook Block
Drilling line
Crown Block
Derrick or mast
Drawworks and supporting rig structure

The maximum permissible operating load is limited by the lowest-rated component in the complete hoisting system.

API 8C Product Classification

The correct product category is:

Traveling Blocks and/or Hook Blocks

Recommended standard wording:

Manufactured to API Standard 8C, applicable current edition, at the specified Product Specification Level.

API Spec 8A should not appear as the active standard in the:

Product title
H1
Specification table
Product Schema
API certificate description
Product marking
SEO metadata

The API Monogram should only be referenced when:

Goldenman holds an active API 8C licence;
its licence includes Traveling Blocks and/or Hook Blocks;
the supplied YG model is manufactured under that licensed scope;
the required PSL is satisfied;
applicable inspection, testing and marking requirements are completed.

Verified YG Series Reference Data

Model	Published Maximum Hook Load	Published Sheave Quantity	Main Hook Opening	Spring Travel
YG60	600 kN	3 or 4*	110 mm	115 mm
YG90	900 kN	3 or 4*	130 mm	120 mm
YG110	1,100 kN	3 or 4*	140 mm	150 mm
YG135	1,350 kN / approx. 150 short tons	4	150 mm	170 mm
YG170	1,700 kN / approx. 190 short tons	5	200 mm	170 mm
YG225	2,250 kN / approx. 250 short tons	5	190 mm	180 mm
YG350	3,170 kN / approx. 350 short tons	5	220 mm	200 mm
YG450	4,500 kN / approx. 500 short tons	6	220 mm	200 mm

*The current source table uses the notation “3,4” for YG60, YG90 and YG110. Goldenman must confirm whether this means optional three- and four-sheave configurations or whether the original table has a formatting error.

The following parameters are intentionally not assigned model by model until the original factory table is recovered:

Sheave outside diameter
Drilling-line diameter
Overall dimensions
Product weight
Main hook body diameter
Minor hook dimensions
Bearing model
Reeving arrangement

YG60 Hook Block

YG60 is the smallest model in the current Goldenman YG range.

Published reference data include:

Maximum hook load: 600 kN
Main hook opening: 110 mm
Spring travel: 115 mm
Sheave quantity: three or four, subject to confirmation

Typical applications can include:

Compact workover rigs
Well-servicing rigs
Shallow drilling rigs
Restricted-height masts
Lower-capacity hoisting systems

The YG60 should be selected from actual hook-load and drilling-line calculations rather than from rig depth alone.

YG90 Hook Block

YG90 provides a published maximum hook load of 900 kN.

It may be suitable for:

Workover rigs
Light drilling rigs
Production-well servicing
Mobile rig packages
Rig refurbishment projects

Its published main hook opening is 130 mm, with a spring travel of 120 mm.

The Crown Block, line size and moving-sheave quantity must be confirmed before quotation.

YG110 Hook Block

YG110 has a published maximum hook load of 1,100 kN.

Reference data include:

Main hook opening: 140 mm
Spring travel: 150 mm
Sheave quantity: three or four, subject to confirmation

The YG110 may be selected for medium workover operations and compact drilling systems requiring more capacity than the YG60 or YG90.

Although the existing URL emphasizes YG110, the page covers the complete YG Series.

YG135 Hook Block

YG135 provides a published maximum hook load of:

1,350 kN
Approximately 150 short tons

The current table lists:

Four sheaves
Main hook opening of 150 mm
Spring travel of 170 mm

It can be considered for medium-capacity drilling and workover rigs using a compatible four-sheave moving-block arrangement.

YG170 Hook Block

YG170 provides a published maximum hook load of:

1,700 kN
Approximately 190 short tons

The current table lists:

Five sheaves
Main hook opening of 200 mm
Spring travel of 170 mm

The main hook opening is larger than the value published for YG225. This may reflect a genuine structural difference, but it must be checked against Goldenman’s YG170 drawing before publication.

YG225 Hook Block

YG225 provides a published maximum hook load of:

2,250 kN
Approximately 250 short tons

Its listed configuration includes:

Five sheaves
Main hook opening of 190 mm
Spring travel of 180 mm

It may be selected for medium drilling rigs, heavy workover units and casing-running operations requiring a compact integrated traveling assembly.

YG350 Hook Block

YG350 provides a published maximum hook load of:

3,170 kN
Approximately 350 short tons

Its current configuration includes:

Five sheaves
Main hook opening of 220 mm
Spring travel of 200 mm

Goldenman should confirm whether the approved rated-load value is exactly 3,170 kN or another value shown on the engineering drawing and product nameplate.

The model should not be renamed YG315 solely because some other product families use 3,150 kN as a nominal 350-ton class.

YG450 Hook Block

YG450 is the largest model in the current series.

Published data include:

Maximum hook load: 4,500 kN
Approximate load class: 500 short tons
Six sheaves
Main hook opening: 220 mm
Spring travel: 200 mm

The YG450 can be considered for:

Heavy land drilling rigs
Deep-well drilling
Large casing programs
High hook-load operations
Heavy rig refurbishment
Restricted-height hoisting arrangements

Selection requires a complete review of the Crown Block, drilling line, Drawworks, derrick or mast, drilling swivel and Elevator Links.

Hook Block vs Standalone Traveling Block

A YG Hook Block should not be confused with a YC Traveling Block.

Comparison	YG Hook Block	YC Traveling Block
Main construction	Traveling Block and Drilling Hook integrated	Traveling Block only
Main drilling hook	Included	Separate DG or compatible hook required
Sheave assembly	Included	Included
Main hook opening	Product parameter	Not applicable
Spring travel	Included in integrated hook	Provided by separate hook
Overall height	Generally shorter	Depends on block-to-hook connection
API category	Traveling Blocks and/or Hook Blocks	Traveling Blocks and/or Hook Blocks
Goldenman model examples	YG60–YG450	YC170–YC675
Direct interchangeability	No	No

YC315 must therefore be removed from this YG product page.

Advantages of the Integrated Structure

An integrated Hook Block can provide:

Reduced overall traveling assembly length
More usable mast or derrick clearance
Fewer intermediate block-to-hook components
Compact hoisting-system arrangement
Defined Traveling Block-to-hook load path
Better suitability for selected mobile and workover rigs
Simplified replacement of an existing integrated assembly

The reduced length does not automatically make the equipment compatible with every Top Drive.

Top-drive applications require verification of:

Guide dolly
Link adapter
Service loops
Traveling centerline
Elevator Link position
Mast clearance
Maximum block travel
Crown Block clearance

Selecting the Correct Hook Block

1. Determine Maximum Hook Load

The required model must be selected from the maximum expected operating hook load.

The review should include:

Drillstring weight
Bottom-hole assembly weight
Casing-string weight
Tubing-string weight
Buoyancy
Overpull
Stuck-pipe contingency
Acceleration and deceleration
Dynamic hoisting effects
Offshore rig motion
Operator safety requirements

The model number should not replace a complete load calculation.

2. Confirm Drilling-Line Diameter

The drilling-line diameter must match:

Sheave groove radius
Sheave pitch diameter
Crown Block
Drawworks drum
Deadline anchor
Reeving arrangement
Required fast-line tension

An oversized line may contact the groove edges.

An undersized line may not seat correctly and can experience increased flattening, abrasion and bending fatigue.

3. Confirm Sheave Quantity and Reeving

The moving-sheave quantity affects:

Number of drilling-line parts
Fast-line tension
Hook speed
Drawworks line pull
Reeving efficiency
Crown Block compatibility

The sheave quantity should not be selected only from maximum hook load.

4. Match the Crown Block

Provide:

Crown Block manufacturer
Crown Block model
Number of sheaves
Sheave diameter
Groove profile
Drilling-line diameter
Sheave spacing
Rated load
Existing reeving diagram

Nominal load compatibility alone is insufficient.

5. Verify the Main Hook and Swivel Bail

Provide:

Drilling swivel manufacturer
Swivel model
Bail width
Bail cross-section
Contact radius
Required articulation
Main hook throat
Safety-latch clearance

A swivel bail that physically enters the hook opening may still create edge loading or restricted articulation.

6. Verify Elevator Link Compatibility

Confirm:

Elevator Link model
Rated load
Upper-eye dimensions
Link-body diameter
Working length
Contact radius
Required swing angle
Clearance from the main hook
Clearance from the swivel

Elevator Links must engage only the approved supporting areas shown on the Hook Block drawing.

Sheave and Bearing System

A typical YG Hook Block includes:

Multiple moving sheaves
Sheave shafts
Roller bearings
Bearing seals
Lubrication channels
Side plates
Rope guards
Shaft retainers
Spacer components

The sheave system must support:

Drilling-line load
Repeated rotation
Bending fatigue of the wire rope
Dynamic block movement
Unequal reeving forces
Environmental contamination

The model datasheet should define:

Sheave outside diameter
Pitch diameter
Groove diameter
Groove profile
Bearing type
Shaft diameter
Lubrication method
Maximum allowable groove wear

Sheave Groove Hardening

Goldenman states that the sheave grooves are quenched to extend service life.

The final manufacturing documentation should define:

Sheave material
Heat-treatment process
Surface hardness
Effective hardened depth
Groove profile
Final machining process
Hardness inspection method

Excessive hardness can increase cracking risk, while insufficient hardness can accelerate groove wear.

A generic “quenched groove” claim should therefore be supported by model-specific records.

Rope Guards

Rope guards help keep the drilling line within the sheave grooves.

Inspect the guards for:

Correct clearance
Deformation
Cracking
Loose fasteners
Contact with the wire rope
Missing sections
Interference during reeving

Rope guards do not compensate for incorrect reeving, misaligned sheaves or unsuitable drilling-line diameter.

Main Hook Safety Device

The main hook includes a retaining device intended to reduce the risk of accidental release of the swivel bail or connected equipment.

Before operation, inspect:

Safety latch
Latch pin
Return spring
Locking surface
Main hook throat
Bail seating
Closing clearance
Mechanical damage
Unauthorized modification

Do not load the Hook Block when the safety device:

Cannot close completely
Is bent or cracked
Has missing parts
Interferes with the swivel bail
Has been tied open
Has an unapproved repair

Hook Rotation and Position Lock

The integrated drilling hook may rotate to align suspended equipment.

The system should provide:

Controlled free rotation
Positive position locking
Clear operating positions
Reliable lock engagement
Accessible inspection
Lubrication access

The rotation lock must not be used to absorb uncontrolled Power Tong or Casing Tong reaction torque.

Connection reaction torque must be controlled by an approved backup tong or separate reaction system.

Spring Travel

The published spring-travel values range from 115 to 200 mm.

Depending on the model design, the spring or cushioning arrangement can help:

Reduce impact during load transfer
Protect drill pipe connections
Control limited hook movement
Improve swivel and kelly handling

Spring travel is not additional block travel and does not permit shock loading.

The factory datasheet should define:

Spring type
Spring quantity
Initial preload
Working travel
Maximum travel
Inspection criteria
Replacement limits
Hydraulic buffer details where fitted

PSL 1 and PSL 2

The purchaser should state the required API 8C Product Specification Level.

PSL selection can affect:

Design documentation
Material control
Heat-to-product traceability
Mechanical testing
Impact testing
Heat-treatment records
NDE
Proof-load testing
Product marking
Documentation

The quotation, product nameplate and Certificate of Conformity should identify the applicable PSL.

Material Definition

The current page describes the complete equipment as both “High Manganese Steel” and “Forging.”

This is not technically adequate for an integrated Hook Block.

Different components may require different materials and manufacturing routes:

Main hook body
Hook bail
Side plates
Sheaves
Sheave shafts
Pins
Bearing supports
Rope guards
Retaining components

The final datasheet should state the approved material and manufacturing route for each critical load-bearing part.

Inspection Before Each Use

Inspect:

Side plates
Sheaves
Sheave grooves
Sheave shafts
Bearings
Rope guards
Main hook body
Main hook opening
Safety latch
Hook bail and support
Elevator Link interfaces
Rotation lock
Spring or cushioning system
Fasteners
Lubrication lines
Product identification
Rated-load marking

Remove the equipment from service when there is evidence of:

Cracking
Permanent deformation
Excessive groove wear
Bearing seizure
Shaft movement
Damaged rope guards
Hook-throat deformation
Failed safety latch
Unauthorized welding
Severe corrosion
Missing or illegible identification

Replacement Compatibility

A replacement Hook Block should not be ordered using only the YG model.

Provide:

Existing manufacturer
Existing model
Serial number
Maximum hook load
Number of sheaves
Sheave outside diameter
Sheave groove profile
Drilling-line diameter
Reeving arrangement
Main hook opening
Spring travel
Swivel-bail dimensions
Elevator Link model
Overall dimensions
Product weight
Crown Block model
Drawworks model
Existing drawings
Installation photographs

Two YG225 Hook Blocks may use different sheave, bearing, line and hook-interface arrangements.

Direct interchangeability must be confirmed from drawings.

Manufacturing and Quality Control

Goldenman manufacturing and inspection controls can include:

Raw-material certificate verification
Heat-number traceability
Casting, forging and plate-material inspection
Heat-treatment verification
Mechanical-property testing
Impact testing where required
Side-plate dimensional inspection
Main-hook dimensional inspection
Sheave dimensional inspection
Groove-profile inspection
Groove-hardness testing
Sheave-shaft inspection
Bearing-seat inspection
Ultrasonic examination
Magnetic-particle examination
Safety-device inspection
Hook rotation and locking test
Spring-travel verification
Sheave rotation test
Bearing-clearance inspection
Proof-load testing
Post-load dimensional inspection
Post-test NDE where required
Product marking inspection
Final documentation review

Factory Acceptance Test

The agreed FAT can include:

Approved datasheet review
General arrangement drawing verification
Material traceability review
Overall dimensional inspection
Product-weight verification
Sheave-quantity verification
Sheave-diameter inspection
Groove-profile inspection
Drilling-line fit verification
Sheave rotation test
Bearing-temperature monitoring
Main-hook opening measurement
Safety-device test
Hook rotation and locking test
Spring-travel test
Proof-load test
Post-load dimensional inspection
Post-load NDE
Product marking verification
Documentation review

Available Documentation

The project documentation package can include:

API 8C certificate according to Goldenman’s licensed scope
Certificate of Conformity
Model-specific datasheet
General assembly drawing
Reeving diagram
Crown Block matching data
Sheave and drilling-line chart
Swivel-bail interface drawing
Elevator Link interface drawing
Material certificates
Heat-treatment records
Mechanical-property reports
Impact-test reports where required
Hardness report
NDE reports
Dimensional inspection report
Sheave and groove inspection report
Functional-test report
Proof-load test report
Post-test inspection report
Product traceability record
Operation and maintenance manual
Recommended spare-parts list
Third-party inspection report

Recommended Spare Parts

A model-specific spare package can include:

Sheaves
Sheave bearings
Bearing seals
Sheave shafts
Shaft retainers
Rope guards
Main-hook safety latch
Latch pins
Latch springs
Rotation-lock components
Spring components
Cushioning-system seals
Lubrication fittings
Grease lines
Approved fasteners

Load-bearing replacement parts must match the approved model drawing and material specification.

Frequently Asked Questions

Is this a Traveling Block or a Hook Block?

It is an integrated Hook Block.

It combines a Traveling Block sheave assembly and a complete Drilling Hook in one load-bearing unit.

Does this page include YC315?

No.

YC315 is a standalone Traveling Block model and should be included on the separate YC Series Traveling Blocks page.

Is YG110 a four-sheave Hook Block?

The current source table shows “3,4” for YG110.

Goldenman must confirm whether it is available in both three- and four-sheave configurations or whether the table formatting is incorrect.

Does YG350 mean a 350 kN load rating?

No.

The current page lists the YG350 at 3,170 kN, approximately 350 short tons.

Can a YG450 be used with any 500-ton Crown Block?

Not automatically.

The sheave quantity, diameter, groove profile, drilling-line diameter, spacing and reeving arrangement must all match.

Can the same Hook Block use different drilling-line diameters?

Only when the sheave groove design and approved model documentation support those line sizes.

The line must also match the Crown Block, Drawworks drum and Deadline Anchor.

Why are the overall dimensions and weights not included in the main table?

The current webpage contains ten dimension and weight entries for only eight YG models.

The original factory table must be recovered before these values can be assigned reliably.

Can the sheaves be interchanged with Crown Block sheaves?

Only when the part numbers, bearing arrangements, shaft dimensions, groove profiles and engineering drawings confirm interchangeability.

What causes premature drilling-line wear?

Common causes include:

Incorrect groove profile
Worn sheave grooves
Wrong line diameter
Sheave misalignment
Bearing seizure
Incorrect reeving
Excessive line tension
Inadequate lubrication
Damaged rope guards

Can the main hook be repaired by field welding?

Not without an approved engineering and repair procedure.

Unauthorized welding can change the material properties and invalidate the load-bearing qualification.

Information Required for Quotation

Please provide:

Required YG model
Maximum operating hook load
Drilling or workover rig model
Derrick or mast model
Crown Block manufacturer and model
Crown Block rated load
Number of moving sheaves
Number of Crown Block sheaves
Sheave diameter
Drilling-line diameter
Wire-rope construction
Reeving arrangement
Drawworks model
Main hook opening
Drilling swivel or power-swivel model
Swivel-bail dimensions
Elevator Link model and dimensions
Required spring travel
Available mast clearance
Top Drive model where applicable
Required PSL 1 or PSL 2
Minimum operating temperature
Land or offshore application
API Monogram requirement
NDE requirements
Proof-load witness requirement
Third-party inspection requirement
Spare-parts requirements
Quantity
Destination country
Delivery schedule

For replacement projects, also provide the existing nameplate, serial number, reeving drawing, general assembly drawing and installation photographs.

Request a Technical Quotation

Goldenman supplies API 8C YG Series Hook Blocks for drilling, workover and rig-refurbishment projects.

Available models include YG60, YG90, YG110, YG135, YG170, YG225, YG350 and YG450, with published maximum hook loads from 600 to 4,500 kN.

Send your hook-load, Crown Block, drilling-line, reeving, swivel-bail, Elevator Link and mast-clearance information to:

Email: info@goldenman.com

Goldenman will review the complete hoisting-system interface and prepare the recommended Hook Block model, technical drawing, reeving data, inspection plan and commercial quotation.

Integrated Traveling Blocks and Drilling Hooks for Rig Hoisting