Hammer Black Pearl Urethane Bowling Ball
$229.95 Original price was: $229.95.$149.95Current price is: $149.95.
SKU: HAM-BLKPRLTHN
Categories: Bowling Balls, Bowling Brand, Hammer, Hammer Bowling Balls, Mid-Performance Bowling Balls, MRP/MAP, Symmetrical Core Bowling Balls, Urethane Bowling Balls
Tags: .015 Diff, 2.65 RG, Bowling Ball, Hammer, Urethane Pearl
Brand: Hammer
What should I know about the Black Pearl Urethane?
High-RG, low-differential symmetric LED Core for minimal flare
Harder Urethane Pearl 78D cover for predictable, controllable motion
Urethane control for dry, short, and broken-down lanes
Customers Also Bought

Hammer Purple Pearl Urethane Bowling Ball

Hammer Arctic Vibe Bowling Ball

Max Tack Bowling Ball Coverstock Cleaner 8 oz.

Hammer Rotating Ball Cup

Hammer Urethane Magic Bowling Ball Cleaner 7 oz

Storm Phaze 2 Bowling Ball
Description
Controlled, Predictable Urethane Motion
About the Black Pearl Urethane
The Hammer Black Pearl Urethane is a control specialist built on Hammer’s harder 78D urethane. It pairs the symmetric LED Core with the Urethane Pearl 78D coverstock, delivering a smooth, predictable, low-flare motion for dry to medium oil and short patterns. It is the ball you reach for when control matters more than hook.
The Black Pearl Urethane reads the lane gently and predictably. The urethane cover generates less friction and stores less energy than reactive resin, so the ball holds a controlled line where a strong reactive ball would over-hook. The 78D urethane is a harder, more controllable formulation, ideal for short patterns, broken-down lanes, and precise spare and control shots.
Understanding the Hammer LED Core and Hammer Urethane Pearl 78D
Hammer built the Black Pearl Urethane for controlled, predictable urethane motion on dry to medium oil. Specifically, the symmetric LED Core posts a 2.650 RG and a low .015 differential, numbers that produce minimal flare and a smooth, on-line motion, while the harder Urethane Pearl 78D cover at a 500 Siaair Micro Pad finish reads the lane gently rather than snapping. As a result, it delivers a controlled, repeatable shape on short and worn conditions. The per-weight specifications are listed below.
A High-RG, Low-Differential Symmetric Core for Minimal Flare
At the heart of the Black Pearl Urethane is the symmetric LED Core. At 15 lb it measures a high 2.650 RG and a low .015 differential, numbers that produce minimal track flare and a smooth, controlled motion. The high RG and low differential keep the reaction even and predictable, exactly what a control ball needs.
That low-flare, on-line behavior is what gives the Black Pearl Urethane its controlled feel. As a symmetric core, it reads the lane the same way shot after shot, so the ball holds its line through dry and short patterns rather than over-reacting at the breakpoint.
A Harder 78D Urethane Cover for Predictable Control
The Black Pearl Urethane wraps that core in Hammer’s Urethane Pearl 78D coverstock at a 500 Siaair Micro Pad finish. Urethane generates less friction than reactive resin, so the ball reads the lane gently and holds a controlled line instead of snapping hard at the breakpoint. The harder 78D formulation adds even more control and length.
That smooth, even reaction is exactly what makes the Black Pearl Urethane a control weapon. On short patterns and broken-down lanes, it gets a predictable read where a strong reactive ball would jump. Take the surface down for a touch more grip, or smooth it up for a bit more length, with surface changes done at your pro shop.
Black Pearl Urethane Specs
| Weight | Radius of Gyration (RG) | Differential |
|---|---|---|
| 16 lbs | 2.610 | .030 |
| 15 lbs | 2.650 | .015 |
| 14 lbs | 2.680 | .013 |
| 13 lbs | 2.631 | .020 |
| 12 lbs | 2.628 | .026 |
RG and differential vary by weight. Specifications provided by the manufacturer.
Who This Ball Is Right For
✓Control Players: A smooth, on-line urethane reaction for dry, short, and broken-down lanes
✓Short-Pattern Bowlers: Minimal flare and a predictable read for short patterns where a reactive ball over-reacts
✓Urethane Users: A harder 78D urethane that holds its line on demanding conditions but stays tunable
✓Arsenal Builders: A specialty control piece for the driest and shortest conditions, when angle is the enemy
Good to Know Before You Buy
·Control over raw hook: The lower differential means moderate total hook. For maximum board coverage on heavy oil, step up to stronger equipment.
·Ships sanded for traction: The 500 Siaair Micro Pad finish is built to grip in oil. Polish it for more length when the volume drops.
·Sold undrilled: Ships without finger holes, so it can be fitted to your hand and span.
BowlersMart Tips: Where the Black Pearl Urethane Fits in Your Hammer Arsenal
Where It Fits in Your Arsenal
In the Hammer lineup, the Black Pearl Urethane is a specialty control piece for dry, short, and broken-down lanes. Where your reactive balls hook sharply, the 78D urethane reads smoothly and holds its line, so it shines when the pattern is short or the lanes have given out. It is the ball you reach for when control matters more than hook.
Surface Adjustments
The 500 Siaair finish gives the Black Pearl Urethane its controlled, urethane read. Take it lower for a touch more grip on the driest lanes, or smooth it up for a bit more length. Have surface changes done at your pro shop for an even, consistent finish.
Coverstock Care
Wipe the urethane cover with an approved ball cleaner after every session. Keeping the cover fresh preserves the smooth, predictable read that makes the Black Pearl Urethane such a dependable control piece.
Earn points on every Hammer purchase through the Striking Rewards loyalty program. Every ball you add to your arsenal builds toward your next reward.
Shop With Confidence at BowlersMart
The Hammer Black Pearl Urethane Bowling Ball ships free with no minimum purchase and is backed by our 60-day return policy. As an authorized Hammer dealer, every ball is genuine and covered by the full one-year Hammer warranty. Place your order before 2 PM EST and it ships the same day.
Additional information
| Weight | 15 lbs |
|---|---|
| Dimensions | 10 × 10 × 10 in |
| Brand | |
| Bowling Ball Coverstock Type | |
| Bowling Ball Cover Name | |
| Bowling Ball Core Shape | |
| Bowling Ball Core Name | |
| Radius of Gyration: RG (15LB) | |
| Differential: Diff (15LB) | |
| Mass Bias Strength | |
| Flare Potential | |
| Surface Finish | |
| Preferred Lane Conditions | |
| Ball Weight | |
| Bowling Ball Color | |
| Ball Performance Level | |
| Scent | |
| Release Date |
Reviews
Reviews
Q&A
Everyday Free Shipping

Place your order before 2PM EST Monday - Friday (excluding holidays) and your order will ship out same day for in stock and available products. In stock items will ship out the following weekday if purchased after 2PM EST.
In stock Items may take 3-5 business days to arrive depending on your location. (2-10 days in AK, HI, PR, GU, APO, FPO).
We use USPS Priority Mail, Parcel Post, UPS and FedEx as our methods of shipping. Ground Shipping is ALWAYS free in the USA (except Alaska, Hawaii, Puerto Rico, Guam, and APO / FPO addresses), no matter how many items you order, no matter the weight, no matter the distance!
International Shipping - Duties, & Taxes & Return Information
Duties & Taxes - If shipping international, duties and taxes will need to be paid locally. BowlersMart.com is not responsible for any local duties or tax fees.Returns - We gladly ship worldwide, but please note that international customers are responsible for all return shipping and handling costs. If you wish to return your order, you must cover all shipping fees, duties, and any additional charges incurred. We recommend using a trackable shipping method to ensure your return reaches us safely. For more details, please review our full return policy or contact our customer support team.
⚠️
WARNING:
This product can expose you to chemicals including Lead, Phthalates, and/or other chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.








